/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c

Bug Summary

File:	ksp/pc/impls/gasm/gasm.c
Warning:	line 962, column 27 Array access (via field 'iis') results in a null pointer dereference

Annotated Source Code

[?] Use j/k keys for keyboard navigation

This file defines an "generalized" additive Schwarz preconditioner for any Mat implementation.

In this version each processor may intersect multiple subdomains and any subdomain may

intersect multiple processors. Intersections of subdomains with processors are called *local

subdomains*.

N - total number of distinct global subdomains (set explicitly in PCGASMSetTotalSubdomains() or implicitly PCGASMSetSubdomains() and then calculated in PCSetUp_GASM())

n - actual number of local subdomains on this processor (set in PCGASMSetSubdomains() or calculated in PCGASMSetTotalSubdomains())

nmax - maximum number of local subdomains per processor (calculated in PCSetUp_GASM())

#include <petsc/private/pcimpl.h> /*I "petscpc.h" I*/

#include <petscdm.h>

typedef struct {

PetscInt N,n,nmax;

PetscInt overlap; /* overlap requested by user */

PCGASMType type; /* use reduced interpolation, restriction or both */

PetscBool type_set; /* if user set this value (so won't change it for symmetric problems) */

PetscBool same_subdomain_solvers; /* flag indicating whether all local solvers are same */

PetscBool sort_indices; /* flag to sort subdomain indices */

PetscBool user_subdomains; /* whether the user set explicit subdomain index sets -- keep them on PCReset() */

PetscBool dm_subdomains; /* whether DM is allowed to define subdomains */

PetscBool hierarchicalpartitioning;

IS *ois; /* index sets that define the outer (conceptually, overlapping) subdomains */

IS *iis; /* index sets that define the inner (conceptually, nonoverlapping) subdomains */

KSP *ksp; /* linear solvers for each subdomain */

Mat *pmat; /* subdomain block matrices */

Vec gx,gy; /* Merged work vectors */

Vec *x,*y; /* Split work vectors; storage aliases pieces of storage of the above merged vectors. */

VecScatter gorestriction; /* merged restriction to disjoint union of outer subdomains */

VecScatter girestriction; /* merged restriction to disjoint union of inner subdomains */

VecScatter pctoouter;

IS permutationIS;

Mat permutationP;

Mat pcmat;

Vec pcx,pcy;

} PC_GASM;

static PetscErrorCode PCGASMComputeGlobalSubdomainNumbering_Private(PC pc,PetscInt **numbering,PetscInt **permutation)

{

PC_GASM *osm = (PC_GASM*)pc->data;

PetscInt i;

PetscErrorCode ierr;

PetscFunctionBegindo { do { ; if (petscstack && (petscstack->currentsize
< 64)) { petscstack->function[petscstack->currentsize
] = __func__; petscstack->file[petscstack->currentsize]
= "/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
; petscstack->line[petscstack->currentsize] = 45; petscstack
->petscroutine[petscstack->currentsize] = PETSC_TRUE; petscstack
->currentsize++; } if (petscstack) { petscstack->hotdepth
+= (PETSC_FALSE || petscstack->hotdepth); } ; } while (0)
; ; } while (0);

/* Determine the number of globally-distinct subdomains and compute a global numbering for them. */

ierr = PetscMalloc2(osm->n,numbering,osm->n,permutation)PetscMallocA(2,PETSC_FALSE,47,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,(size_t)(osm->n)*sizeof(**(numbering)),(numbering),(size_t
)(osm->n)*sizeof(**(permutation)),(permutation));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),47,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

ierr = PetscObjectsListGetGlobalNumbering(PetscObjectComm((PetscObject)pc),osm->n,(PetscObject*)osm->iis,NULL((void*)0),*numbering);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),48,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

for (i = 0; i < osm->n; ++i) (*permutation)[i] = i;

ierr = PetscSortIntWithPermutation(osm->n,*numbering,*permutation);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),50,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

PetscFunctionReturn(0)do { do { ; if (petscstack && petscstack->currentsize
> 0) { petscstack->currentsize--; petscstack->function
[petscstack->currentsize] = 0; petscstack->file[petscstack
->currentsize] = 0; petscstack->line[petscstack->currentsize
] = 0; petscstack->petscroutine[petscstack->currentsize
] = PETSC_FALSE; } if (petscstack) { petscstack->hotdepth =
(((petscstack->hotdepth-1)<(0)) ? (0) : (petscstack->
hotdepth-1)); } ; } while (0); return(0);} while (0);

}

static PetscErrorCode PCGASMSubdomainView_Private(PC pc, PetscInt i, PetscViewer viewer)

{

PC_GASM *osm = (PC_GASM*)pc->data;

PetscInt j,nidx;

const PetscInt *idx;

PetscViewer sviewer;

char *cidx;

PetscErrorCode ierr;

PetscFunctionBegindo { do { ; if (petscstack && (petscstack->currentsize
< 64)) { petscstack->function[petscstack->currentsize
] = __func__; petscstack->file[petscstack->currentsize]
= "/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
; petscstack->line[petscstack->currentsize] = 63; petscstack
->petscroutine[petscstack->currentsize] = PETSC_TRUE; petscstack
->currentsize++; } if (petscstack) { petscstack->hotdepth
+= (PETSC_FALSE || petscstack->hotdepth); } ; } while (0)
; ; } while (0);

if (i < 0 || i > osm->n) SETERRQ2(PetscObjectComm((PetscObject)viewer), PETSC_ERR_ARG_WRONG, "Invalid subdomain %D: must nonnegative and less than %D", i, osm->n)return PetscError(PetscObjectComm((PetscObject)viewer),64,__func__
,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c",62
,PETSC_ERROR_INITIAL,"Invalid subdomain %D: must nonnegative and less than %D"
,i,osm->n);

/* Inner subdomains. */

ierr = ISGetLocalSize(osm->iis[i], &nidx);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),66,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

No more than 15 characters per index plus a space.

PetscViewerStringSPrintf requires a string of size at least 2, so use (nidx+1) instead of nidx,

in case nidx == 0. That will take care of the space for the trailing '\0' as well.

For nidx == 0, the whole string 16 '\0'.

#define len 16*(nidx+1)+1

ierr = PetscMalloc1(len, &cidx)PetscMallocA(1,PETSC_FALSE,74,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,(size_t)(len)*sizeof(**(&cidx)),(&cidx));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),74,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

ierr = PetscViewerStringOpen(PETSC_COMM_SELF((MPI_Comm)0x44000001), cidx, len, &sviewer);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),75,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

#undef len

ierr = ISGetIndices(osm->iis[i], &idx);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),77,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

for (j = 0; j < nidx; ++j) {

ierr = PetscViewerStringSPrintf(sviewer, "%D ", idx[j]);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),79,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

}

ierr = ISRestoreIndices(osm->iis[i],&idx);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),81,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

ierr = PetscViewerDestroy(&sviewer);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),82,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

ierr = PetscViewerASCIIPrintf(viewer, "Inner subdomain:\n");CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),83,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

ierr = PetscViewerFlush(viewer);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),84,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

ierr = PetscViewerASCIIPushSynchronized(viewer);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),85,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

ierr = PetscViewerASCIISynchronizedPrintf(viewer, "%s", cidx);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),86,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

ierr = PetscViewerFlush(viewer);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),87,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

ierr = PetscViewerASCIIPopSynchronized(viewer);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),88,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

ierr = PetscViewerASCIIPrintf(viewer, "\n");CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),89,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

ierr = PetscViewerFlush(viewer);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),90,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

ierr = PetscFree(cidx)((*PetscTrFree)((void*)(cidx),91,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
) || ((cidx) = 0,0));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),91,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

/* Outer subdomains. */

ierr = ISGetLocalSize(osm->ois[i], &nidx);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),93,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

No more than 15 characters per index plus a space.

PetscViewerStringSPrintf requires a string of size at least 2, so use (nidx+1) instead of nidx,

in case nidx == 0. That will take care of the space for the trailing '\0' as well.

For nidx == 0, the whole string 16 '\0'.

100

#define len 16*(nidx+1)+1

101

ierr = PetscMalloc1(len, &cidx)PetscMallocA(1,PETSC_FALSE,101,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,(size_t)(len)*sizeof(**(&cidx)),(&cidx));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),101,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

102

ierr = PetscViewerStringOpen(PETSC_COMM_SELF((MPI_Comm)0x44000001), cidx, len, &sviewer);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),102,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

103

#undef len

104

ierr = ISGetIndices(osm->ois[i], &idx);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),104,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

105

for (j = 0; j < nidx; ++j) {

106

ierr = PetscViewerStringSPrintf(sviewer,"%D ", idx[j]);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),106,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

107

}

108

ierr = PetscViewerDestroy(&sviewer);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),108,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

109

ierr = ISRestoreIndices(osm->ois[i],&idx);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),109,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

110

ierr = PetscViewerASCIIPrintf(viewer, "Outer subdomain:\n");CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),110,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

111

ierr = PetscViewerFlush(viewer);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),111,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

112

ierr = PetscViewerASCIIPushSynchronized(viewer);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),112,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

113

ierr = PetscViewerASCIISynchronizedPrintf(viewer, "%s", cidx);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),113,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

114

ierr = PetscViewerFlush(viewer);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),114,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

115

ierr = PetscViewerASCIIPopSynchronized(viewer);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),115,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

116

ierr = PetscViewerASCIIPrintf(viewer, "\n");CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),116,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

117

ierr = PetscViewerFlush(viewer);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),117,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

118

ierr = PetscFree(cidx)((*PetscTrFree)((void*)(cidx),118,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
) || ((cidx) = 0,0));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),118,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

119

120

}

121

122

static PetscErrorCode PCGASMPrintSubdomains(PC pc)

123

{

124

PC_GASM *osm = (PC_GASM*)pc->data;

125

const char *prefix;

126

char fname[PETSC_MAX_PATH_LEN4096+1];

127

PetscInt l, d, count;

128

PetscBool doprint,found;

129

PetscViewer viewer, sviewer = NULL((void*)0);

130

PetscInt *numbering,*permutation;/* global numbering of locally-supported subdomains and the permutation from the local ordering */

131

PetscErrorCode ierr;

132

133

PetscFunctionBegindo { do { ; if (petscstack && (petscstack->currentsize
< 64)) { petscstack->function[petscstack->currentsize
] = __func__; petscstack->file[petscstack->currentsize]
= "/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
; petscstack->line[petscstack->currentsize] = 133; petscstack
->petscroutine[petscstack->currentsize] = PETSC_TRUE; petscstack
->currentsize++; } if (petscstack) { petscstack->hotdepth
+= (PETSC_FALSE || petscstack->hotdepth); } ; } while (0)
; ; } while (0);

134

ierr = PCGetOptionsPrefix(pc,&prefix);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),134,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

135

doprint = PETSC_FALSE;

136

ierr = PetscOptionsGetBool(NULL((void*)0),prefix,"-pc_gasm_print_subdomains",&doprint,NULL((void*)0));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),136,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

137

if (!doprint) PetscFunctionReturn(0)do { do { ; if (petscstack && petscstack->currentsize
> 0) { petscstack->currentsize--; petscstack->function
[petscstack->currentsize] = 0; petscstack->file[petscstack
->currentsize] = 0; petscstack->line[petscstack->currentsize
] = 0; petscstack->petscroutine[petscstack->currentsize
] = PETSC_FALSE; } if (petscstack) { petscstack->hotdepth =
(((petscstack->hotdepth-1)<(0)) ? (0) : (petscstack->
hotdepth-1)); } ; } while (0); return(0);} while (0);

138

ierr = PetscOptionsGetString(NULL((void*)0),prefix,"-pc_gasm_print_subdomains",fname,PETSC_MAX_PATH_LEN4096,&found);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),138,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

139

if (!found) { ierr = PetscStrcpy(fname,"stdout");CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),139,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0); };

140

ierr = PetscViewerASCIIOpen(PetscObjectComm((PetscObject)pc),fname,&viewer);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),140,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

141

142

Make sure the viewer has a name. Otherwise this may cause a deadlock or other weird errors when creating a subcomm viewer:

143

the subcomm viewer will attempt to inherit the viewer's name, which, if not set, will be constructed collectively on the comm.

144

145

ierr = PetscObjectName((PetscObject)viewer);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),145,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

146

l = 0;

147

ierr = PCGASMComputeGlobalSubdomainNumbering_Private(pc,&numbering,&permutation);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),147,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

148

for (count = 0; count < osm->N; ++count) {

149

/* Now let subdomains go one at a time in the global numbering order and print their subdomain/solver info. */

150

if (l<osm->n) {

151

d = permutation[l]; /* d is the local number of the l-th smallest (in the global ordering) among the locally supported subdomains */

152

if (numbering[d] == count) {

153

ierr = PetscViewerGetSubViewer(viewer,((PetscObject)osm->ois[d])->comm, &sviewer);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),153,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

154

ierr = PCGASMSubdomainView_Private(pc,d,sviewer);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),154,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

155

ierr = PetscViewerRestoreSubViewer(viewer,((PetscObject)osm->ois[d])->comm, &sviewer);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),155,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

156

++l;

157

}

158

}

159

ierr = MPI_Barrier(PetscObjectComm((PetscObject)pc));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),159,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

160

}

161

ierr = PetscFree2(numbering,permutation)PetscFreeA(2,161,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,&(numbering),&(permutation));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),161,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

162

ierr = PetscViewerDestroy(&viewer);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),162,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

163

164

}

165

166

167

static PetscErrorCode PCView_GASM(PC pc,PetscViewer viewer)

168

{

169

PC_GASM *osm = (PC_GASM*)pc->data;

170

const char *prefix;

171

PetscErrorCode ierr;

172

PetscMPIInt rank, size;

173

PetscInt bsz;

174

PetscBool iascii,view_subdomains=PETSC_FALSE;

175

PetscViewer sviewer;

176

PetscInt count, l;

177

char overlap[256] = "user-defined overlap";

178

char gsubdomains[256] = "unknown total number of subdomains";

179

char msubdomains[256] = "unknown max number of local subdomains";

180

PetscInt *numbering,*permutation;/* global numbering of locally-supported subdomains and the permutation from the local ordering */

181

182

PetscFunctionBegindo { do { ; if (petscstack && (petscstack->currentsize
< 64)) { petscstack->function[petscstack->currentsize
] = __func__; petscstack->file[petscstack->currentsize]
= "/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
; petscstack->line[petscstack->currentsize] = 182; petscstack
->petscroutine[petscstack->currentsize] = PETSC_TRUE; petscstack
->currentsize++; } if (petscstack) { petscstack->hotdepth
+= (PETSC_FALSE || petscstack->hotdepth); } ; } while (0)
; ; } while (0);

183

ierr = MPI_Comm_size(PetscObjectComm((PetscObject)pc), &size);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),183,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

184

ierr = MPI_Comm_rank(PetscObjectComm((PetscObject)pc), &rank);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),184,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

185

186

if (osm->overlap >= 0) {

187

ierr = PetscSNPrintf(overlap,sizeof(overlap),"requested amount of overlap = %D",osm->overlap);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),187,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

188

}

189

if (osm->N != PETSC_DETERMINE-1) {

190

ierr = PetscSNPrintf(gsubdomains, sizeof(gsubdomains), "total number of subdomains = %D",osm->N);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),190,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

191

}

192

if (osm->nmax != PETSC_DETERMINE-1) {

193

ierr = PetscSNPrintf(msubdomains,sizeof(msubdomains),"max number of local subdomains = %D",osm->nmax);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),193,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

194

}

195

196

ierr = PCGetOptionsPrefix(pc,&prefix);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),196,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

197

ierr = PetscOptionsGetBool(NULL((void*)0),prefix,"-pc_gasm_view_subdomains",&view_subdomains,NULL((void*)0));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),197,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

198

199

ierr = PetscObjectTypeCompare((PetscObject)viewer,PETSCVIEWERASCII"ascii",&iascii);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),199,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

200

if (iascii) {

201

202

Make sure the viewer has a name. Otherwise this may cause a deadlock when creating a subcomm viewer:

203

the subcomm viewer will attempt to inherit the viewer's name, which, if not set, will be constructed

204

collectively on the comm.

205

206

ierr = PetscObjectName((PetscObject)viewer);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),206,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

207

ierr = PetscViewerASCIIPrintf(viewer," Restriction/interpolation type: %s\n",PCGASMTypes[osm->type]);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),207,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

208

ierr = PetscViewerASCIIPrintf(viewer," %s\n",overlap);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),208,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

209

ierr = PetscViewerASCIIPrintf(viewer," %s\n",gsubdomains);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),209,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

210

ierr = PetscViewerASCIIPrintf(viewer," %s\n",msubdomains);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),210,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

211

ierr = PetscViewerASCIIPushSynchronized(viewer);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),211,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

212

ierr = PetscViewerASCIISynchronizedPrintf(viewer," [%d|%d] number of locally-supported subdomains = %D\n",rank,size,osm->n);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),212,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

213

ierr = PetscViewerFlush(viewer);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),213,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

214

ierr = PetscViewerASCIIPopSynchronized(viewer);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),214,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

215

/* Cannot take advantage of osm->same_subdomain_solvers without a global numbering of subdomains. */

216

ierr = PetscViewerASCIIPrintf(viewer," Subdomain solver info is as follows:\n");CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),216,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

217

ierr = PetscViewerASCIIPushTab(viewer);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),217,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

218

ierr = PetscViewerASCIIPrintf(viewer," - - - - - - - - - - - - - - - - - -\n");CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),218,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

219

/* Make sure that everybody waits for the banner to be printed. */

220

ierr = MPI_Barrier(PetscObjectComm((PetscObject)viewer));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),220,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

221

/* Now let subdomains go one at a time in the global numbering order and print their subdomain/solver info. */

222

ierr = PCGASMComputeGlobalSubdomainNumbering_Private(pc,&numbering,&permutation);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),222,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

223

l = 0;

224

for (count = 0; count < osm->N; ++count) {

225

PetscMPIInt srank, ssize;

226

if (l<osm->n) {

227

PetscInt d = permutation[l]; /* d is the local number of the l-th smallest (in the global ordering) among the locally supported subdomains */

228

if (numbering[d] == count) {

229

ierr = MPI_Comm_size(((PetscObject)osm->ois[d])->comm, &ssize);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),229,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

230

ierr = MPI_Comm_rank(((PetscObject)osm->ois[d])->comm, &srank);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),230,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

231

ierr = PetscViewerGetSubViewer(viewer,((PetscObject)osm->ois[d])->comm, &sviewer);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),231,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

232

ierr = ISGetLocalSize(osm->ois[d],&bsz);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),232,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

233

ierr = PetscViewerASCIISynchronizedPrintf(sviewer," [%d|%d] (subcomm [%d|%d]) local subdomain number %D, local size = %D\n",rank,size,srank,ssize,d,bsz);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),233,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

234

ierr = PetscViewerFlush(sviewer);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),234,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

235

if (view_subdomains) {

236

ierr = PCGASMSubdomainView_Private(pc,d,sviewer);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),236,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

237

}

238

if (!pc->setupcalled) {

239

ierr = PetscViewerASCIIPrintf(sviewer, " Solver not set up yet: PCSetUp() not yet called\n");CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),239,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

240

} else {

241

ierr = KSPView(osm->ksp[d],sviewer);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),241,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

242

}

243

ierr = PetscViewerASCIIPrintf(sviewer," - - - - - - - - - - - - - - - - - -\n");CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),243,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

244

ierr = PetscViewerFlush(sviewer);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),244,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

245

ierr = PetscViewerRestoreSubViewer(viewer,((PetscObject)osm->ois[d])->comm, &sviewer);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),245,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

246

++l;

247

}

248

}

249

ierr = MPI_Barrier(PetscObjectComm((PetscObject)pc));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),249,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

250

}

251

ierr = PetscFree2(numbering,permutation)PetscFreeA(2,251,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,&(numbering),&(permutation));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),251,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

252

ierr = PetscViewerASCIIPopTab(viewer);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),252,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

253

}

254

ierr = PetscViewerFlush(viewer);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),254,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

255

ierr = PetscViewerASCIIPopSynchronized(viewer);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),255,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

256

257

}

258

259

PETSC_INTERNextern __attribute__((visibility ("hidden"))) PetscErrorCode PCGASMCreateLocalSubdomains(Mat A, PetscInt nloc, IS *iis[]);

260

261

262

263

PetscErrorCode PCGASMSetHierarchicalPartitioning(PC pc)

264

{

265

PC_GASM *osm = (PC_GASM*)pc->data;

266

MatPartitioning part;

267

MPI_Comm comm;

268

PetscMPIInt size;

269

PetscInt nlocalsubdomains,fromrows_localsize;

270

IS partitioning,fromrows,isn;

271

Vec outervec;

272

PetscErrorCode ierr;

273

274

PetscFunctionBegindo { do { ; if (petscstack && (petscstack->currentsize
< 64)) { petscstack->function[petscstack->currentsize
] = __func__; petscstack->file[petscstack->currentsize]
= "/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
; petscstack->line[petscstack->currentsize] = 274; petscstack
->petscroutine[petscstack->currentsize] = PETSC_TRUE; petscstack
->currentsize++; } if (petscstack) { petscstack->hotdepth
+= (PETSC_FALSE || petscstack->hotdepth); } ; } while (0)
; ; } while (0);

275

ierr = PetscObjectGetComm((PetscObject)pc,&comm);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),275,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

276

ierr = MPI_Comm_size(comm,&size);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),276,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

277

/* we do not need a hierarchical partitioning when

278

* the total number of subdomains is consistent with

279

* the number of MPI tasks.

280

* For the following cases, we do not need to use HP

281

* */

282

if(osm->N==PETSC_DETERMINE-1 || osm->N>=size || osm->N==1) PetscFunctionReturn(0)do { do { ; if (petscstack && petscstack->currentsize
> 0) { petscstack->currentsize--; petscstack->function
[petscstack->currentsize] = 0; petscstack->file[petscstack
->currentsize] = 0; petscstack->line[petscstack->currentsize
] = 0; petscstack->petscroutine[petscstack->currentsize
] = PETSC_FALSE; } if (petscstack) { petscstack->hotdepth =
(((petscstack->hotdepth-1)<(0)) ? (0) : (petscstack->
hotdepth-1)); } ; } while (0); return(0);} while (0);

283

if(size%osm->N != 0) SETERRQ2(PETSC_COMM_WORLD,PETSC_ERR_ARG_INCOMP,"have to specify the total number of subdomains %D to be a factor of the number of processors %d \n",osm->N,size)return PetscError(PETSC_COMM_WORLD,283,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,75,PETSC_ERROR_INITIAL,"have to specify the total number of subdomains %D to be a factor of the number of processors %d \n"
,osm->N,size);

284

nlocalsubdomains = size/osm->N;

285

osm->n = 1;

286

ierr = MatPartitioningCreate(comm,&part);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),286,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

287

ierr = MatPartitioningSetAdjacency(part,pc->pmat);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),287,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

288

ierr = MatPartitioningSetType(part,MATPARTITIONINGHIERARCH"hierarch");CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),288,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

289

ierr = MatPartitioningHierarchicalSetNcoarseparts(part,osm->N);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),289,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

290

ierr = MatPartitioningHierarchicalSetNfineparts(part,nlocalsubdomains);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),290,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

291

ierr = MatPartitioningSetFromOptions(part);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),291,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

292

/* get new processor owner number of each vertex */

293

ierr = MatPartitioningApply(part,&partitioning);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),293,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

294

ierr = ISBuildTwoSided(partitioning,NULL((void*)0),&fromrows);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),294,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

295

ierr = ISPartitioningToNumbering(partitioning,&isn);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),295,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

296

ierr = ISDestroy(&isn);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),296,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

297

ierr = ISGetLocalSize(fromrows,&fromrows_localsize);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),297,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

298

ierr = MatPartitioningDestroy(&part);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),298,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

299

ierr = MatCreateVecs(pc->pmat,&outervec,NULL((void*)0));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),299,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

300

ierr = VecCreateMPI(comm,fromrows_localsize,PETSC_DETERMINE-1,&(osm->pcx));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),300,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

301

ierr = VecDuplicate(osm->pcx,&(osm->pcy));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),301,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

302

ierr = VecScatterCreate(osm->pcx,NULL((void*)0),outervec,fromrows,&(osm->pctoouter));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),302,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

303

ierr = MatCreateSubMatrix(pc->pmat,fromrows,fromrows,MAT_INITIAL_MATRIX,&(osm->permutationP));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),303,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

304

ierr = PetscObjectReference((PetscObject)fromrows);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),304,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

305

osm->permutationIS = fromrows;

306

osm->pcmat = pc->pmat;

307

ierr = PetscObjectReference((PetscObject)osm->permutationP);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),307,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

308

pc->pmat = osm->permutationP;

309

ierr = VecDestroy(&outervec);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),309,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

310

ierr = ISDestroy(&fromrows);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),310,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

311

ierr = ISDestroy(&partitioning);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),311,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

312

osm->n = PETSC_DETERMINE-1;

313

314

}

315

316

317

318

static PetscErrorCode PCSetUp_GASM(PC pc)

319

{

320

PC_GASM *osm = (PC_GASM*)pc->data;

321

PetscErrorCode ierr;

322

PetscBool symset,flg;

323

PetscInt i,nInnerIndices,nTotalInnerIndices;

324

PetscMPIInt rank, size;

325

MatReuse scall = MAT_REUSE_MATRIX;

326

KSP ksp;

327

PC subpc;

328

const char *prefix,*pprefix;

329

Vec x,y;

330

PetscInt oni; /* Number of indices in the i-th local outer subdomain. */

331

const PetscInt *oidxi; /* Indices from the i-th subdomain local outer subdomain. */

332

PetscInt on; /* Number of indices in the disjoint union of local outer subdomains. */

333

PetscInt *oidx; /* Indices in the disjoint union of local outer subdomains. */

334

IS gois; /* Disjoint union the global indices of outer subdomains. */

335

IS goid; /* Identity IS of the size of the disjoint union of outer subdomains. */

336

PetscScalar *gxarray, *gyarray;

337

PetscInt gostart; /* Start of locally-owned indices in the vectors -- osm->gx,osm->gy -- over the disjoint union of outer subdomains. */

338

PetscInt num_subdomains = 0;

339

DM *subdomain_dm = NULL((void*)0);

340

char **subdomain_names = NULL((void*)0);

341

PetscInt *numbering;

342

343

344

PetscFunctionBegindo { do { ; if (petscstack && (petscstack->currentsize
< 64)) { petscstack->function[petscstack->currentsize
] = __func__; petscstack->file[petscstack->currentsize]
= "/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
; petscstack->line[petscstack->currentsize] = 344; petscstack
->petscroutine[petscstack->currentsize] = PETSC_TRUE; petscstack
->currentsize++; } if (petscstack) { petscstack->hotdepth
+= (PETSC_FALSE || petscstack->hotdepth); } ; } while (0)
; ; } while (0);

345

ierr = MPI_Comm_size(PetscObjectComm((PetscObject)pc),&size);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),345,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

346

ierr = MPI_Comm_rank(PetscObjectComm((PetscObject)pc),&rank);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),346,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

347

if (!pc->setupcalled) {

348

/* use a hierarchical partitioning */

349

if(osm->hierarchicalpartitioning){

350

ierr = PCGASMSetHierarchicalPartitioning(pc);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),350,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

351

}

352

if (!osm->type_set) {

353

ierr = MatIsSymmetricKnown(pc->pmat,&symset,&flg);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),353,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

354

if (symset && flg) osm->type = PC_GASM_BASIC;

355

}

356

357

if (osm->n == PETSC_DETERMINE-1) {

358

if (osm->N != PETSC_DETERMINE-1) {

359

/* No local subdomains given, but the desired number of total subdomains is known, so construct them accordingly. */

360

ierr = PCGASMCreateSubdomains(pc->pmat,osm->N,&osm->n,&osm->iis);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),360,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

361

} else if (osm->dm_subdomains && pc->dm) {

362

/* try pc->dm next, if allowed */

363

PetscInt d;

364

IS *inner_subdomain_is, *outer_subdomain_is;

365

ierr = DMCreateDomainDecomposition(pc->dm, &num_subdomains, &subdomain_names, &inner_subdomain_is, &outer_subdomain_is, &subdomain_dm);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),365,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

366

if (num_subdomains) {

367

ierr = PCGASMSetSubdomains(pc, num_subdomains, inner_subdomain_is, outer_subdomain_is);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),367,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

368

}

369

for (d = 0; d < num_subdomains; ++d) {

370

if (inner_subdomain_is) {ierr = ISDestroy(&inner_subdomain_is[d]);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),370,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);}

371

if (outer_subdomain_is) {ierr = ISDestroy(&outer_subdomain_is[d]);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),371,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);}

372

}

373

ierr = PetscFree(inner_subdomain_is)((*PetscTrFree)((void*)(inner_subdomain_is),373,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
) || ((inner_subdomain_is) = 0,0));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),373,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

374

ierr = PetscFree(outer_subdomain_is)((*PetscTrFree)((void*)(outer_subdomain_is),374,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
) || ((outer_subdomain_is) = 0,0));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),374,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

375

} else {

376

/* still no subdomains; use one per processor */

377

osm->nmax = osm->n = 1;

378

ierr = MPI_Comm_size(PetscObjectComm((PetscObject)pc),&size);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),378,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

379

osm->N = size;

380

ierr = PCGASMCreateLocalSubdomains(pc->pmat,osm->n,&osm->iis);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),380,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

381

}

382

}

383

if (!osm->iis) {

384

385

osm->n was set in PCGASMSetSubdomains(), but the actual subdomains have not been supplied.

386

We create the requisite number of local inner subdomains and then expand them into

387

out subdomains, if necessary.

388

389

ierr = PCGASMCreateLocalSubdomains(pc->pmat,osm->n,&osm->iis);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),389,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

390

}

391

if (!osm->ois) {

392

393

Initially make outer subdomains the same as inner subdomains. If nonzero additional overlap

394

has been requested, copy the inner subdomains over so they can be modified.

395

396

ierr = PetscMalloc1(osm->n,&osm->ois)PetscMallocA(1,PETSC_FALSE,396,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,(size_t)(osm->n)*sizeof(**(&osm->ois)),(&osm->
ois));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),396,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

397

for (i=0; i<osm->n; ++i) {

398

if (osm->overlap > 0 && osm->N>1) { /* With positive overlap, osm->iis[i] will be modified */

399

ierr = ISDuplicate(osm->iis[i],(osm->ois)+i);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),399,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

400

ierr = ISCopy(osm->iis[i],osm->ois[i]);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),400,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

401

} else {

402

ierr = PetscObjectReference((PetscObject)((osm->iis)[i]));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),402,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

403

osm->ois[i] = osm->iis[i];

404

}

405

}

406

if (osm->overlap>0 && osm->N>1) {

407

/* Extend the "overlapping" regions by a number of steps */

408

ierr = MatIncreaseOverlapSplit(pc->pmat,osm->n,osm->ois,osm->overlap);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),408,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

409

}

410

}

411

412

/* Now the subdomains are defined. Determine their global and max local numbers, if necessary. */

413

if (osm->nmax == PETSC_DETERMINE-1) {

414

PetscMPIInt inwork,outwork;

415

/* determine global number of subdomains and the max number of local subdomains */

416

inwork = osm->n;

417

ierr = MPIU_Allreduce(&inwork,&outwork,1,MPI_INT,MPI_MAX,PetscObjectComm((PetscObject)pc))(PetscAllreduceBarrierCheck(PetscObjectComm((PetscObject)pc),
1,417,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
) || ((petsc_allreduce_ct += PetscMPIParallelComm((PetscObjectComm
((PetscObject)pc))),0) || MPI_Allreduce((&inwork),(&outwork
),(1),(((MPI_Datatype)0x4c000405)),((MPI_Op)(0x58000001)),(PetscObjectComm
((PetscObject)pc)))));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),417,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

418

osm->nmax = outwork;

419

}

420

if (osm->N == PETSC_DETERMINE-1) {

421

/* Determine the number of globally-distinct subdomains and compute a global numbering for them. */

422

ierr = PetscObjectsListGetGlobalNumbering(PetscObjectComm((PetscObject)pc),osm->n,(PetscObject*)osm->ois,&osm->N,NULL((void*)0));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),422,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

423

}

424

425

426

if (osm->sort_indices) {

427

for (i=0; i<osm->n; i++) {

428

ierr = ISSort(osm->ois[i]);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),428,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

429

ierr = ISSort(osm->iis[i]);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),429,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

430

}

431

}

432

ierr = PCGetOptionsPrefix(pc,&prefix);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),432,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

433

ierr = PCGASMPrintSubdomains(pc);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),433,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

434

435

436

Merge the ISs, create merged vectors and restrictions.

437

438

/* Merge outer subdomain ISs and construct a restriction onto the disjoint union of local outer subdomains. */

439

on = 0;

440

for (i=0; i<osm->n; i++) {

441

ierr = ISGetLocalSize(osm->ois[i],&oni);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),441,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

442

on += oni;

443

}

444

ierr = PetscMalloc1(on, &oidx)PetscMallocA(1,PETSC_FALSE,444,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,(size_t)(on)*sizeof(**(&oidx)),(&oidx));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),444,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

445

on = 0;

446

/* Merge local indices together */

447

for (i=0; i<osm->n; i++) {

448

ierr = ISGetLocalSize(osm->ois[i],&oni);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),448,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

449

ierr = ISGetIndices(osm->ois[i],&oidxi);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),449,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

450

ierr = PetscArraycpy(oidx+on,oidxi,oni)((sizeof(*(oidx+on)) != sizeof(*(oidxi))) || PetscMemcpy(oidx
+on,oidxi,(oni)*sizeof(*(oidx+on))));;CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),450,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

451

ierr = ISRestoreIndices(osm->ois[i],&oidxi);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),451,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

452

on += oni;

453

}

454

ierr = ISCreateGeneral(((PetscObject)(pc))->comm,on,oidx,PETSC_OWN_POINTER,&gois);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),454,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

455

nTotalInnerIndices = 0;

456

for(i=0; i<osm->n; i++){

457

ierr = ISGetLocalSize(osm->iis[i],&nInnerIndices);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),457,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

458

nTotalInnerIndices += nInnerIndices;

459

}

460

ierr = VecCreateMPI(((PetscObject)(pc))->comm,nTotalInnerIndices,PETSC_DETERMINE-1,&x);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),460,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

461

ierr = VecDuplicate(x,&y);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),461,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

462

463

ierr = VecCreateMPI(PetscObjectComm((PetscObject)pc),on,PETSC_DECIDE-1,&osm->gx);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),463,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

464

ierr = VecDuplicate(osm->gx,&osm->gy);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),464,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

465

ierr = VecGetOwnershipRange(osm->gx, &gostart, NULL((void*)0));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),465,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

466

ierr = ISCreateStride(PetscObjectComm((PetscObject)pc),on,gostart,1, &goid);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),466,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

467

/* gois might indices not on local */

468

ierr = VecScatterCreate(x,gois,osm->gx,goid, &(osm->gorestriction));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),468,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

469

ierr = PetscMalloc1(osm->n,&numbering)PetscMallocA(1,PETSC_FALSE,469,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,(size_t)(osm->n)*sizeof(**(&numbering)),(&numbering
));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),469,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

470

ierr = PetscObjectsListGetGlobalNumbering(PetscObjectComm((PetscObject)pc),osm->n,(PetscObject*)osm->ois,NULL((void*)0),numbering);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),470,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

471

ierr = VecDestroy(&x);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),471,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

472

ierr = ISDestroy(&gois);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),472,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

473

474

/* Merge inner subdomain ISs and construct a restriction onto the disjoint union of local inner subdomains. */

475

{

476

PetscInt ini; /* Number of indices the i-th a local inner subdomain. */

477

PetscInt in; /* Number of indices in the disjoint uniont of local inner subdomains. */

478

PetscInt *iidx; /* Global indices in the merged local inner subdomain. */

479

PetscInt *ioidx; /* Global indices of the disjoint union of inner subdomains within the disjoint union of outer subdomains. */

480

IS giis; /* IS for the disjoint union of inner subdomains. */

481

IS giois; /* IS for the disjoint union of inner subdomains within the disjoint union of outer subdomains. */

482

PetscScalar *array;

483

const PetscInt *indices;

484

PetscInt k;

485

on = 0;

486

for (i=0; i<osm->n; i++) {

487

ierr = ISGetLocalSize(osm->ois[i],&oni);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),487,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

488

on += oni;

489

}

490

ierr = PetscMalloc1(on, &iidx)PetscMallocA(1,PETSC_FALSE,490,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,(size_t)(on)*sizeof(**(&iidx)),(&iidx));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),490,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

491

ierr = PetscMalloc1(on, &ioidx)PetscMallocA(1,PETSC_FALSE,491,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,(size_t)(on)*sizeof(**(&ioidx)),(&ioidx));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),491,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

492

ierr = VecGetArray(y,&array);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),492,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

493

/* set communicator id to determine where overlap is */

494

in = 0;

495

for (i=0; i<osm->n; i++) {

496

ierr = ISGetLocalSize(osm->iis[i],&ini);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),496,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

497

for (k = 0; k < ini; ++k){

498

array[in+k] = numbering[i];

499

}

500

in += ini;

501

}

502

ierr = VecRestoreArray(y,&array);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),502,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

503

ierr = VecScatterBegin(osm->gorestriction,y,osm->gy,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),503,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

504

ierr = VecScatterEnd(osm->gorestriction,y,osm->gy,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),504,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

505

ierr = VecGetOwnershipRange(osm->gy,&gostart, NULL((void*)0));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),505,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

506

ierr = VecGetArray(osm->gy,&array);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),506,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

507

on = 0;

508

in = 0;

509

for (i=0; i<osm->n; i++) {

510

ierr = ISGetLocalSize(osm->ois[i],&oni);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),510,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

511

ierr = ISGetIndices(osm->ois[i],&indices);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),511,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

512

for (k=0; k<oni; k++) {

513

/* skip overlapping indices to get inner domain */

514

if(PetscRealPart(array[on+k])(array[on+k]) != numbering[i]) continue;

515

iidx[in] = indices[k];

516

ioidx[in++] = gostart+on+k;

517

}

518

ierr = ISRestoreIndices(osm->ois[i], &indices);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),518,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

519

on += oni;

520

}

521

ierr = VecRestoreArray(osm->gy,&array);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),521,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

522

ierr = ISCreateGeneral(PetscObjectComm((PetscObject)pc),in,iidx,PETSC_OWN_POINTER,&giis);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),522,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

523

ierr = ISCreateGeneral(PetscObjectComm((PetscObject)pc),in,ioidx,PETSC_OWN_POINTER,&giois);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),523,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

524

ierr = VecScatterCreate(y,giis,osm->gy,giois,&osm->girestriction);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),524,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

525

ierr = VecDestroy(&y);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),525,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

526

ierr = ISDestroy(&giis);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),526,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

527

ierr = ISDestroy(&giois);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),527,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

528

}

529

ierr = ISDestroy(&goid);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),529,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

530

ierr = PetscFree(numbering)((*PetscTrFree)((void*)(numbering),530,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
) || ((numbering) = 0,0));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),530,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

531

532

/* Create the subdomain work vectors. */

533

ierr = PetscMalloc1(osm->n,&osm->x)PetscMallocA(1,PETSC_FALSE,533,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,(size_t)(osm->n)*sizeof(**(&osm->x)),(&osm->
x));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),533,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

534

ierr = PetscMalloc1(osm->n,&osm->y)PetscMallocA(1,PETSC_FALSE,534,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,(size_t)(osm->n)*sizeof(**(&osm->y)),(&osm->
y));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),534,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

535

ierr = VecGetArray(osm->gx, &gxarray);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),535,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

536

ierr = VecGetArray(osm->gy, &gyarray);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),536,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

537

for (i=0, on=0; i<osm->n; ++i, on += oni) {

538

PetscInt oNi;

539

ierr = ISGetLocalSize(osm->ois[i],&oni);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),539,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

540

/* on a sub communicator */

541

ierr = ISGetSize(osm->ois[i],&oNi);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),541,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

542

ierr = VecCreateMPIWithArray(((PetscObject)(osm->ois[i]))->comm,1,oni,oNi,gxarray+on,&osm->x[i]);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),542,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

543

ierr = VecCreateMPIWithArray(((PetscObject)(osm->ois[i]))->comm,1,oni,oNi,gyarray+on,&osm->y[i]);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),543,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

544

}

545

ierr = VecRestoreArray(osm->gx, &gxarray);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),545,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

546

ierr = VecRestoreArray(osm->gy, &gyarray);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),546,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

547

/* Create the subdomain solvers */

548

ierr = PetscMalloc1(osm->n,&osm->ksp)PetscMallocA(1,PETSC_FALSE,548,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,(size_t)(osm->n)*sizeof(**(&osm->ksp)),(&osm->
ksp));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),548,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

549

for (i=0; i<osm->n; i++) {

550

char subprefix[PETSC_MAX_PATH_LEN4096+1];

551

ierr = KSPCreate(((PetscObject)(osm->ois[i]))->comm,&ksp);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),551,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

552

ierr = KSPSetErrorIfNotConverged(ksp,pc->erroriffailure);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),552,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

553

ierr = PetscLogObjectParent((PetscObject)pc,(PetscObject)ksp);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),553,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

554

ierr = PetscObjectIncrementTabLevel((PetscObject)ksp,(PetscObject)pc,1);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),554,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

555

ierr = KSPSetType(ksp,KSPPREONLY"preonly");CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),555,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

556

ierr = KSPGetPC(ksp,&subpc);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),556,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0); /* Why do we need this here? */

557

if (subdomain_dm) {

558

ierr = KSPSetDM(ksp,subdomain_dm[i]);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),558,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

559

ierr = DMDestroy(subdomain_dm+i);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),559,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

560

}

561

ierr = PCGetOptionsPrefix(pc,&prefix);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),561,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

562

ierr = KSPSetOptionsPrefix(ksp,prefix);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),562,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

563

if (subdomain_names && subdomain_names[i]) {

564

ierr = PetscSNPrintf(subprefix,PETSC_MAX_PATH_LEN4096,"sub_%s_",subdomain_names[i]);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),564,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

565

ierr = KSPAppendOptionsPrefix(ksp,subprefix);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),565,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

566

ierr = PetscFree(subdomain_names[i])((*PetscTrFree)((void*)(subdomain_names[i]),566,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
) || ((subdomain_names[i]) = 0,0));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),566,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

567

}

568

ierr = KSPAppendOptionsPrefix(ksp,"sub_");CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),568,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

569

osm->ksp[i] = ksp;

570

}

571

ierr = PetscFree(subdomain_dm)((*PetscTrFree)((void*)(subdomain_dm),571,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
) || ((subdomain_dm) = 0,0));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),571,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

572

ierr = PetscFree(subdomain_names)((*PetscTrFree)((void*)(subdomain_names),572,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
) || ((subdomain_names) = 0,0));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),572,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

573

scall = MAT_INITIAL_MATRIX;

574

575

} else { /* if (pc->setupcalled) */

576

577

Destroy the submatrices from the previous iteration

578

579

if (pc->flag == DIFFERENT_NONZERO_PATTERN) {

580

ierr = MatDestroyMatrices(osm->n,&osm->pmat);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),580,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

581

scall = MAT_INITIAL_MATRIX;

582

}

583

if(osm->permutationIS){

584

ierr = MatCreateSubMatrix(pc->pmat,osm->permutationIS,osm->permutationIS,scall,&osm->permutationP);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),584,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

585

ierr = PetscObjectReference((PetscObject)osm->permutationP);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),585,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

586

osm->pcmat = pc->pmat;

587

pc->pmat = osm->permutationP;

588

}

589

590

}

591

592

593

594

Extract out the submatrices.

595

596

if (size > 1) {

597

ierr = MatCreateSubMatricesMPI(pc->pmat,osm->n,osm->ois,osm->ois,scall,&osm->pmat);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),597,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

598

} else {

599

ierr = MatCreateSubMatrices(pc->pmat,osm->n,osm->ois,osm->ois,scall,&osm->pmat);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),599,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

600

}

601

if (scall == MAT_INITIAL_MATRIX) {

602

ierr = PetscObjectGetOptionsPrefix((PetscObject)pc->pmat,&pprefix);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),602,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

603

for (i=0; i<osm->n; i++) {

604

ierr = PetscLogObjectParent((PetscObject)pc,(PetscObject)osm->pmat[i]);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),604,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

605

ierr = PetscObjectSetOptionsPrefix((PetscObject)osm->pmat[i],pprefix);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),605,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

606

}

607

}

608

609

/* Return control to the user so that the submatrices can be modified (e.g., to apply

610

different boundary conditions for the submatrices than for the global problem) */

611

ierr = PCModifySubMatrices(pc,osm->n,osm->ois,osm->ois,osm->pmat,pc->modifysubmatricesP);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),611,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

612

613

614

Loop over submatrices putting them into local ksps

615

616

for (i=0; i<osm->n; i++) {

617

ierr = KSPSetOperators(osm->ksp[i],osm->pmat[i],osm->pmat[i]);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),617,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

618

if (!pc->setupcalled) {

619

ierr = KSPSetFromOptions(osm->ksp[i]);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),619,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

620

}

621

}

622

if(osm->pcmat){

623

ierr = MatDestroy(&pc->pmat);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),623,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

624

pc->pmat = osm->pcmat;

625

osm->pcmat = 0;

626

}

627

628

}

629

630

static PetscErrorCode PCSetUpOnBlocks_GASM(PC pc)

631

{

632

PC_GASM *osm = (PC_GASM*)pc->data;

633

PetscErrorCode ierr;

634

PetscInt i;

635

636

PetscFunctionBegindo { do { ; if (petscstack && (petscstack->currentsize
< 64)) { petscstack->function[petscstack->currentsize
] = __func__; petscstack->file[petscstack->currentsize]
= "/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
; petscstack->line[petscstack->currentsize] = 636; petscstack
->petscroutine[petscstack->currentsize] = PETSC_TRUE; petscstack
->currentsize++; } if (petscstack) { petscstack->hotdepth
+= (PETSC_FALSE || petscstack->hotdepth); } ; } while (0)
; ; } while (0);

637

for (i=0; i<osm->n; i++) {

638

ierr = KSPSetUp(osm->ksp[i]);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),638,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

639

}

640

641

}

642

643

static PetscErrorCode PCApply_GASM(PC pc,Vec xin,Vec yout)

644

{

645

PC_GASM *osm = (PC_GASM*)pc->data;

646

PetscErrorCode ierr;

647

PetscInt i;

648

Vec x,y;

649

ScatterMode forward = SCATTER_FORWARD,reverse = SCATTER_REVERSE;

650

651

PetscFunctionBegindo { do { ; if (petscstack && (petscstack->currentsize
< 64)) { petscstack->function[petscstack->currentsize
] = __func__; petscstack->file[petscstack->currentsize]
= "/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
; petscstack->line[petscstack->currentsize] = 651; petscstack
->petscroutine[petscstack->currentsize] = PETSC_TRUE; petscstack
->currentsize++; } if (petscstack) { petscstack->hotdepth
+= (PETSC_FALSE || petscstack->hotdepth); } ; } while (0)
; ; } while (0);

652

if(osm->pctoouter){

653

ierr = VecScatterBegin(osm->pctoouter,xin,osm->pcx,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),653,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

654

ierr = VecScatterEnd(osm->pctoouter,xin,osm->pcx,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),654,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

655

x = osm->pcx;

656

y = osm->pcy;

657

}else{

658

x = xin;

659

y = yout;

660

}

661

662

Support for limiting the restriction or interpolation only to the inner

663

subdomain values (leaving the other values 0).

664

665

if (!(osm->type & PC_GASM_RESTRICT)) {

666

/* have to zero the work RHS since scatter may leave some slots empty */

667

ierr = VecZeroEntries(osm->gx);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),667,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

668

ierr = VecScatterBegin(osm->girestriction,x,osm->gx,INSERT_VALUES,forward);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),668,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

669

} else {

670

ierr = VecScatterBegin(osm->gorestriction,x,osm->gx,INSERT_VALUES,forward);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),670,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

671

}

672

ierr = VecZeroEntries(osm->gy);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),672,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

673

if (!(osm->type & PC_GASM_RESTRICT)) {

674

ierr = VecScatterEnd(osm->girestriction,x,osm->gx,INSERT_VALUES,forward);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),674,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

675

} else {

676

ierr = VecScatterEnd(osm->gorestriction,x,osm->gx,INSERT_VALUES,forward);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),676,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

677

}

678

/* do the subdomain solves */

679

for (i=0; i<osm->n; ++i) {

680

ierr = KSPSolve(osm->ksp[i],osm->x[i],osm->y[i]);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),680,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

681

ierr = KSPCheckSolve(osm->ksp[i],pc,osm->y[i]);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),681,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

682

}

683

/* Do we need to zero y ?? */

684

ierr = VecZeroEntries(y);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),684,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

685

if (!(osm->type & PC_GASM_INTERPOLATE)) {

686

ierr = VecScatterBegin(osm->girestriction,osm->gy,y,ADD_VALUES,reverse);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),686,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

687

ierr = VecScatterEnd(osm->girestriction,osm->gy,y,ADD_VALUES,reverse);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),687,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

688

} else {

689

ierr = VecScatterBegin(osm->gorestriction,osm->gy,y,ADD_VALUES,reverse);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),689,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

690

ierr = VecScatterEnd(osm->gorestriction,osm->gy,y,ADD_VALUES,reverse);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),690,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

691

}

692

if(osm->pctoouter){

693

ierr = VecScatterBegin(osm->pctoouter,y,yout,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),693,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

694

ierr = VecScatterEnd(osm->pctoouter,y,yout,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),694,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

695

}

696

697

}

698

699

static PetscErrorCode PCApplyTranspose_GASM(PC pc,Vec xin,Vec yout)

700

{

701

PC_GASM *osm = (PC_GASM*)pc->data;

702

PetscErrorCode ierr;

703

PetscInt i;

704

Vec x,y;

705

ScatterMode forward = SCATTER_FORWARD,reverse = SCATTER_REVERSE;

706

707

PetscFunctionBegindo { do { ; if (petscstack && (petscstack->currentsize
< 64)) { petscstack->function[petscstack->currentsize
] = __func__; petscstack->file[petscstack->currentsize]
= "/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
; petscstack->line[petscstack->currentsize] = 707; petscstack
->petscroutine[petscstack->currentsize] = PETSC_TRUE; petscstack
->currentsize++; } if (petscstack) { petscstack->hotdepth
+= (PETSC_FALSE || petscstack->hotdepth); } ; } while (0)
; ; } while (0);

708

if(osm->pctoouter){

709

ierr = VecScatterBegin(osm->pctoouter,xin,osm->pcx,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),709,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

710

ierr = VecScatterEnd(osm->pctoouter,xin,osm->pcx,INSERT_VALUES,SCATTER_REVERSE);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),710,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

711

x = osm->pcx;

712

y = osm->pcy;

713

}else{

714

x = xin;

715

y = yout;

716

}

717

718

Support for limiting the restriction or interpolation to only local

719

subdomain values (leaving the other values 0).

720

721

Note: these are reversed from the PCApply_GASM() because we are applying the

722

transpose of the three terms

723

724

if (!(osm->type & PC_GASM_INTERPOLATE)) {

725

/* have to zero the work RHS since scatter may leave some slots empty */

726

ierr = VecZeroEntries(osm->gx);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),726,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

727

ierr = VecScatterBegin(osm->girestriction,x,osm->gx,INSERT_VALUES,forward);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),727,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

728

} else {

729

ierr = VecScatterBegin(osm->gorestriction,x,osm->gx,INSERT_VALUES,forward);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),729,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

730

}

731

ierr = VecZeroEntries(osm->gy);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),731,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

732

if (!(osm->type & PC_GASM_INTERPOLATE)) {

733

ierr = VecScatterEnd(osm->girestriction,x,osm->gx,INSERT_VALUES,forward);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),733,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

734

} else {

735

ierr = VecScatterEnd(osm->gorestriction,x,osm->gx,INSERT_VALUES,forward);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),735,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

736

}

737

/* do the local solves */

738

for (i=0; i<osm->n; ++i) { /* Note that the solves are local, so we can go to osm->n, rather than osm->nmax. */

739

ierr = KSPSolveTranspose(osm->ksp[i],osm->x[i],osm->y[i]);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),739,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

740

ierr = KSPCheckSolve(osm->ksp[i],pc,osm->y[i]);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),740,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

741

}

742

ierr = VecZeroEntries(y);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),742,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

743

if (!(osm->type & PC_GASM_RESTRICT)) {

744

ierr = VecScatterBegin(osm->girestriction,osm->gy,y,ADD_VALUES,reverse);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),744,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

745

ierr = VecScatterEnd(osm->girestriction,osm->gy,y,ADD_VALUES,reverse);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),745,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

746

} else {

747

ierr = VecScatterBegin(osm->gorestriction,osm->gy,y,ADD_VALUES,reverse);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),747,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

748

ierr = VecScatterEnd(osm->gorestriction,osm->gy,y,ADD_VALUES,reverse);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),748,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

749

}

750

if(osm->pctoouter){

751

ierr = VecScatterBegin(osm->pctoouter,y,yout,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),751,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

752

ierr = VecScatterEnd(osm->pctoouter,y,yout,INSERT_VALUES,SCATTER_FORWARD);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),752,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

753

}

754

755

}

756

757

static PetscErrorCode PCReset_GASM(PC pc)

758

{

759

PC_GASM *osm = (PC_GASM*)pc->data;

760

PetscErrorCode ierr;

761

PetscInt i;

762

763

PetscFunctionBegindo { do { ; if (petscstack && (petscstack->currentsize
< 64)) { petscstack->function[petscstack->currentsize
] = __func__; petscstack->file[petscstack->currentsize]
= "/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
; petscstack->line[petscstack->currentsize] = 763; petscstack
->petscroutine[petscstack->currentsize] = PETSC_TRUE; petscstack
->currentsize++; } if (petscstack) { petscstack->hotdepth
+= (PETSC_FALSE || petscstack->hotdepth); } ; } while (0)
; ; } while (0);

764

if (osm->ksp) {

765

for (i=0; i<osm->n; i++) {

766

ierr = KSPReset(osm->ksp[i]);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),766,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

767

}

768

}

769

if (osm->pmat) {

770

if (osm->n > 0) {

771

PetscMPIInt size;

772

ierr = MPI_Comm_size(PetscObjectComm((PetscObject)pc),&size);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),772,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

773

if (size > 1) {

774

/* osm->pmat is created by MatCreateSubMatricesMPI(), cannot use MatDestroySubMatrices() */

775

ierr = MatDestroyMatrices(osm->n,&osm->pmat);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),775,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

776

} else {

777

ierr = MatDestroySubMatrices(osm->n,&osm->pmat);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),777,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

778

}

779

}

780

}

781

if (osm->x) {

782

for (i=0; i<osm->n; i++) {

783

ierr = VecDestroy(&osm->x[i]);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),783,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

784

ierr = VecDestroy(&osm->y[i]);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),784,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

785

}

786

}

787

ierr = VecDestroy(&osm->gx);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),787,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

788

ierr = VecDestroy(&osm->gy);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),788,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

789

790

ierr = VecScatterDestroy(&osm->gorestriction);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),790,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

791

ierr = VecScatterDestroy(&osm->girestriction);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),791,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

792

if (!osm->user_subdomains) {

793

ierr = PCGASMDestroySubdomains(osm->n,&osm->ois,&osm->iis);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),793,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

794

osm->N = PETSC_DETERMINE-1;

795

osm->nmax = PETSC_DETERMINE-1;

796

}

797

if(osm->pctoouter){

798

ierr = VecScatterDestroy(&(osm->pctoouter));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),798,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

799

}

800

if(osm->permutationIS){

801

ierr = ISDestroy(&(osm->permutationIS));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),801,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

802

}

803

if(osm->pcx){

804

ierr = VecDestroy(&(osm->pcx));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),804,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

805

}

806

if(osm->pcy){

807

ierr = VecDestroy(&(osm->pcy));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),807,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

808

}

809

if(osm->permutationP){

810

ierr = MatDestroy(&(osm->permutationP));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),810,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

811

}

812

if(osm->pcmat){

813

ierr = MatDestroy(&osm->pcmat);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),813,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

814

}

815

816

}

817

818

static PetscErrorCode PCDestroy_GASM(PC pc)

819

{

820

PC_GASM *osm = (PC_GASM*)pc->data;

821

PetscErrorCode ierr;

822

PetscInt i;

823

824

PetscFunctionBegindo { do { ; if (petscstack && (petscstack->currentsize
< 64)) { petscstack->function[petscstack->currentsize
] = __func__; petscstack->file[petscstack->currentsize]
= "/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
; petscstack->line[petscstack->currentsize] = 824; petscstack
->petscroutine[petscstack->currentsize] = PETSC_TRUE; petscstack
->currentsize++; } if (petscstack) { petscstack->hotdepth
+= (PETSC_FALSE || petscstack->hotdepth); } ; } while (0)
; ; } while (0);

825

ierr = PCReset_GASM(pc);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),825,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

826

/* PCReset will not destroy subdomains, if user_subdomains is true. */

827

ierr = PCGASMDestroySubdomains(osm->n,&osm->ois,&osm->iis);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),827,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

828

if (osm->ksp) {

829

for (i=0; i<osm->n; i++) {

830

ierr = KSPDestroy(&osm->ksp[i]);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),830,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

831

}

832

ierr = PetscFree(osm->ksp)((*PetscTrFree)((void*)(osm->ksp),832,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
) || ((osm->ksp) = 0,0));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),832,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

833

}

834

ierr = PetscFree(osm->x)((*PetscTrFree)((void*)(osm->x),834,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
) || ((osm->x) = 0,0));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),834,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

835

ierr = PetscFree(osm->y)((*PetscTrFree)((void*)(osm->y),835,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
) || ((osm->y) = 0,0));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),835,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

836

ierr = PetscFree(pc->data)((*PetscTrFree)((void*)(pc->data),836,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
) || ((pc->data) = 0,0));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),836,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

837

838

}

839

840

static PetscErrorCode PCSetFromOptions_GASM(PetscOptionItems *PetscOptionsObject,PC pc)

841

{

842

PC_GASM *osm = (PC_GASM*)pc->data;

843

PetscErrorCode ierr;

844

PetscInt blocks,ovl;

845

PetscBool symset,flg;

846

PCGASMType gasmtype;

847

848

PetscFunctionBegindo { do { ; if (petscstack && (petscstack->currentsize
< 64)) { petscstack->function[petscstack->currentsize
] = __func__; petscstack->file[petscstack->currentsize]
= "/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
; petscstack->line[petscstack->currentsize] = 848; petscstack
->petscroutine[petscstack->currentsize] = PETSC_TRUE; petscstack
->currentsize++; } if (petscstack) { petscstack->hotdepth
+= (PETSC_FALSE || petscstack->hotdepth); } ; } while (0)
; ; } while (0);

849

/* set the type to symmetric if matrix is symmetric */

850

if (!osm->type_set && pc->pmat) {

851

ierr = MatIsSymmetricKnown(pc->pmat,&symset,&flg);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),851,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

852

if (symset && flg) osm->type = PC_GASM_BASIC;

853

}

854

ierr = PetscOptionsHead(PetscOptionsObject,"Generalized additive Schwarz options");CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),854,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

855

ierr = PetscOptionsBool("-pc_gasm_use_dm_subdomains","If subdomains aren't set, use DMCreateDomainDecomposition() to define subdomains.","PCGASMSetUseDMSubdomains",osm->dm_subdomains,&osm->dm_subdomains,&flg)PetscOptionsBool_Private(PetscOptionsObject,"-pc_gasm_use_dm_subdomains"
,"If subdomains aren't set, use DMCreateDomainDecomposition() to define subdomains."
,"PCGASMSetUseDMSubdomains",osm->dm_subdomains,&osm->
dm_subdomains,&flg);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),855,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

856

ierr = PetscOptionsInt("-pc_gasm_total_subdomains","Total number of subdomains across communicator","PCGASMSetTotalSubdomains",osm->N,&blocks,&flg)PetscOptionsInt_Private(PetscOptionsObject,"-pc_gasm_total_subdomains"
,"Total number of subdomains across communicator","PCGASMSetTotalSubdomains"
,osm->N,&blocks,&flg,(-2147483647 - 1),2147483647);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),856,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

857

if (flg) {

858

ierr = PCGASMSetTotalSubdomains(pc,blocks);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),858,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

859

}

860

ierr = PetscOptionsInt("-pc_gasm_overlap","Number of overlapping degrees of freedom","PCGASMSetOverlap",osm->overlap,&ovl,&flg)PetscOptionsInt_Private(PetscOptionsObject,"-pc_gasm_overlap"
,"Number of overlapping degrees of freedom","PCGASMSetOverlap"
,osm->overlap,&ovl,&flg,(-2147483647 - 1),2147483647
);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),860,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

861

if (flg) {

862

ierr = PCGASMSetOverlap(pc,ovl);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),862,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

863

osm->dm_subdomains = PETSC_FALSE;

864

}

865

flg = PETSC_FALSE;

866

ierr = PetscOptionsEnum("-pc_gasm_type","Type of restriction/extension","PCGASMSetType",PCGASMTypes,(PetscEnum)osm->type,(PetscEnum*)&gasmtype,&flg)PetscOptionsEnum_Private(PetscOptionsObject,"-pc_gasm_type","Type of restriction/extension"
,"PCGASMSetType",PCGASMTypes,(PetscEnum)osm->type,(PetscEnum
*)&gasmtype,&flg);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),866,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

867

if (flg) {ierr = PCGASMSetType(pc,gasmtype);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),867,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);}

868

ierr = PetscOptionsBool("-pc_gasm_use_hierachical_partitioning","use hierarchical partitioning",NULL,osm->hierarchicalpartitioning,&osm->hierarchicalpartitioning,&flg)PetscOptionsBool_Private(PetscOptionsObject,"-pc_gasm_use_hierachical_partitioning"
,"use hierarchical partitioning",((void*)0),osm->hierarchicalpartitioning
,&osm->hierarchicalpartitioning,&flg);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),868,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

869

ierr = PetscOptionsTail()0; do {if (PetscOptionsObject->count != 1) do { do { ; if (
petscstack && petscstack->currentsize > 0) { petscstack
->currentsize--; petscstack->function[petscstack->currentsize
] = 0; petscstack->file[petscstack->currentsize] = 0; petscstack
->line[petscstack->currentsize] = 0; petscstack->petscroutine
[petscstack->currentsize] = PETSC_FALSE; } if (petscstack)
{ petscstack->hotdepth = (((petscstack->hotdepth-1)<
(0)) ? (0) : (petscstack->hotdepth-1)); } ; } while (0); return
(0);} while (0);} while(0);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),869,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

870

871

}

872

873

/*------------------------------------------------------------------------------------*/

874

875

/*@

876

PCGASMSetTotalSubdomains - sets the total number of subdomains to use across the

877

communicator.

878

Logically collective on pc

879

880

Input Parameters:

881

+ pc - the preconditioner

882

- N - total number of subdomains

883

884

885

Level: beginner

886

887

.seealso: PCGASMSetSubdomains(), PCGASMSetOverlap()

888

PCGASMCreateSubdomains2D()

889

@*/

890

PetscErrorCode PCGASMSetTotalSubdomains(PC pc,PetscInt N)

891

{

892

PC_GASM *osm = (PC_GASM*)pc->data;

893

PetscMPIInt size,rank;

894

PetscErrorCode ierr;

895

896

PetscFunctionBegindo { do { ; if (petscstack && (petscstack->currentsize
< 64)) { petscstack->function[petscstack->currentsize
] = __func__; petscstack->file[petscstack->currentsize]
= "/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
; petscstack->line[petscstack->currentsize] = 896; petscstack
->petscroutine[petscstack->currentsize] = PETSC_TRUE; petscstack
->currentsize++; } if (petscstack) { petscstack->hotdepth
+= (PETSC_FALSE || petscstack->hotdepth); } ; } while (0)
; ; } while (0);

897

if (N < 1) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_ARG_OUTOFRANGE,"Total number of subdomains must be 1 or more, got N = %D",N)return PetscError(((MPI_Comm)0x44000001),897,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,63,PETSC_ERROR_INITIAL,"Total number of subdomains must be 1 or more, got N = %D"
,N);

898

if (pc->setupcalled) SETERRQ(PetscObjectComm((PetscObject)pc),PETSC_ERR_ARG_WRONGSTATE,"PCGASMSetTotalSubdomains() should be called before calling PCSetUp().")return PetscError(PetscObjectComm((PetscObject)pc),898,__func__
,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c",73
,PETSC_ERROR_INITIAL,"PCGASMSetTotalSubdomains() should be called before calling PCSetUp()."
);

899

900

ierr = PCGASMDestroySubdomains(osm->n,&osm->iis,&osm->ois);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),900,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

901

osm->ois = osm->iis = NULL((void*)0);

902

903

ierr = MPI_Comm_size(PetscObjectComm((PetscObject)pc),&size);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),903,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

904

ierr = MPI_Comm_rank(PetscObjectComm((PetscObject)pc),&rank);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),904,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

905

osm->N = N;

906

osm->n = PETSC_DETERMINE-1;

907

osm->nmax = PETSC_DETERMINE-1;

908

osm->dm_subdomains = PETSC_FALSE;

909

910

}

911

912

913

static PetscErrorCode PCGASMSetSubdomains_GASM(PC pc,PetscInt n,IS iis[],IS ois[])

914

{

915

PC_GASM *osm = (PC_GASM*)pc->data;

916

PetscErrorCode ierr;

917

PetscInt i;

918

919

PetscFunctionBegindo { do { ; if (petscstack && (petscstack->currentsize
< 64)) { petscstack->function[petscstack->currentsize
] = __func__; petscstack->file[petscstack->currentsize]
= "/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
; petscstack->line[petscstack->currentsize] = 919; petscstack
->petscroutine[petscstack->currentsize] = PETSC_TRUE; petscstack
->currentsize++; } if (petscstack) { petscstack->hotdepth
+= (PETSC_FALSE || petscstack->hotdepth); } ; } while (0)
; ; } while (0);

920

if (n < 1) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_ARG_OUTOFRANGE,"Each process must have 1 or more subdomains, got n = %D",n)return PetscError(((MPI_Comm)0x44000001),920,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,63,PETSC_ERROR_INITIAL,"Each process must have 1 or more subdomains, got n = %D"
,n);

Assuming 'n' is >= 1

→

←

Taking false branch

→

921

if (pc->setupcalled) SETERRQ(PetscObjectComm((PetscObject)pc),PETSC_ERR_ARG_WRONGSTATE,"PCGASMSetSubdomains() should be called before calling PCSetUp().")return PetscError(PetscObjectComm((PetscObject)pc),921,__func__
,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c",73
,PETSC_ERROR_INITIAL,"PCGASMSetSubdomains() should be called before calling PCSetUp()."
);

←

Assuming the condition is false

→

←

Taking false branch

→

922

923

ierr = PCGASMDestroySubdomains(osm->n,&osm->iis,&osm->ois);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),923,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

924

osm->iis = osm->ois = NULL((void*)0);

←

Null pointer value stored to field 'iis'

→

925

osm->n = n;

926

osm->N = PETSC_DETERMINE-1;

927

osm->nmax = PETSC_DETERMINE-1;

928

if (ois) {

←

Assuming 'ois' is null

→

←

Taking false branch

→

929

ierr = PetscMalloc1(n,&osm->ois)PetscMallocA(1,PETSC_FALSE,929,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,(size_t)(n)*sizeof(**(&osm->ois)),(&osm->ois));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),929,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

930

for (i=0; i<n; i++) {

931

ierr = PetscObjectReference((PetscObject)ois[i]);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),931,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

932

osm->ois[i] = ois[i];

933

}

934

935

Since the user set the outer subdomains, even if nontrivial overlap was requested via PCGASMSetOverlap(),

936

it will be ignored. To avoid confusion later on (e.g., when viewing the PC), the overlap size is set to -1.

937

938

osm->overlap = -1;

939

/* inner subdomains must be provided */

940

if (!iis) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_ARG_NULL,"inner indices have to be provided \n")return PetscError(((MPI_Comm)0x44000001),940,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,85,PETSC_ERROR_INITIAL,"inner indices have to be provided \n"
);

941

}/* end if */

942

if (iis) {

←

Assuming 'iis' is null

→

←

Taking false branch

→

943

ierr = PetscMalloc1(n,&osm->iis)PetscMallocA(1,PETSC_FALSE,943,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,(size_t)(n)*sizeof(**(&osm->iis)),(&osm->iis));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),943,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

944

for (i=0; i<n; i++) {

945

ierr = PetscObjectReference((PetscObject)iis[i]);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),945,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

946

osm->iis[i] = iis[i];

947

}

948

if (!ois) {

949

osm->ois = NULL((void*)0);

950

/* if user does not provide outer indices, we will create the corresponding outer indices using osm->overlap =1 in PCSetUp_GASM */

951

}

952

}

953

#if defined(PETSC_USE_DEBUG1)

954

{

955

PetscInt j,rstart,rend,*covered,lsize;

956

const PetscInt *indices;

957

/* check if the inner indices cover and only cover the local portion of the preconditioning matrix */

958

ierr = MatGetOwnershipRange(pc->pmat,&rstart,&rend);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),958,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

959

ierr = PetscCalloc1(rend-rstart,&covered)PetscMallocA(1,PETSC_TRUE,959,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,(size_t)(rend-rstart)*sizeof(**(&covered)),(&covered
));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),959,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

960

/* check if the current processor owns indices from others */

961

for (i=0; i<n; i++) {

←

Loop condition is true. Entering loop body

→

962

ierr = ISGetIndices(osm->iis[i],&indices);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),962,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

←

Array access (via field 'iis') results in a null pointer dereference

963

ierr = ISGetLocalSize(osm->iis[i],&lsize);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),963,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

964

for (j=0; j<lsize; j++) {

965

if (indices[j]<rstart || indices[j]>=rend) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_ARG_OUTOFRANGE,"inner subdomains can not own an index %d from other processors", indices[j])return PetscError(((MPI_Comm)0x44000001),965,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,63,PETSC_ERROR_INITIAL,"inner subdomains can not own an index %d from other processors"
,indices[j]);

966

else if (covered[indices[j]-rstart]==1) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_ARG_OUTOFRANGE,"inner subdomains can not have an overlapping index %d ",indices[j])return PetscError(((MPI_Comm)0x44000001),966,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,63,PETSC_ERROR_INITIAL,"inner subdomains can not have an overlapping index %d "
,indices[j]);

967

else covered[indices[j]-rstart] = 1;

968

}

969

ierr = ISRestoreIndices(osm->iis[i],&indices);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),969,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

970

}

971

/* check if we miss any indices */

972

for (i=rstart; i<rend; i++) {

973

if (!covered[i-rstart]) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_ARG_NULL,"local entity %d was not covered by inner subdomains",i)return PetscError(((MPI_Comm)0x44000001),973,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,85,PETSC_ERROR_INITIAL,"local entity %d was not covered by inner subdomains"
,i);

974

}

975

ierr = PetscFree(covered)((*PetscTrFree)((void*)(covered),975,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
) || ((covered) = 0,0));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),975,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

976

}

977

#endif

978

if (iis) osm->user_subdomains = PETSC_TRUE;

979

980

}

981

982

983

static PetscErrorCode PCGASMSetOverlap_GASM(PC pc,PetscInt ovl)

984

{

985

PC_GASM *osm = (PC_GASM*)pc->data;

986

987

PetscFunctionBegindo { do { ; if (petscstack && (petscstack->currentsize
< 64)) { petscstack->function[petscstack->currentsize
] = __func__; petscstack->file[petscstack->currentsize]
= "/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
; petscstack->line[petscstack->currentsize] = 987; petscstack
->petscroutine[petscstack->currentsize] = PETSC_TRUE; petscstack
->currentsize++; } if (petscstack) { petscstack->hotdepth
+= (PETSC_FALSE || petscstack->hotdepth); } ; } while (0)
; ; } while (0);

988

if (ovl < 0) SETERRQ(PetscObjectComm((PetscObject)pc),PETSC_ERR_ARG_OUTOFRANGE,"Negative overlap value requested")return PetscError(PetscObjectComm((PetscObject)pc),988,__func__
,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c",63
,PETSC_ERROR_INITIAL,"Negative overlap value requested");

989

if (pc->setupcalled && ovl != osm->overlap) SETERRQ(PetscObjectComm((PetscObject)pc),PETSC_ERR_ARG_WRONGSTATE,"PCGASMSetOverlap() should be called before PCSetUp().")return PetscError(PetscObjectComm((PetscObject)pc),989,__func__
,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c",73
,PETSC_ERROR_INITIAL,"PCGASMSetOverlap() should be called before PCSetUp()."
);

990

if (!pc->setupcalled) osm->overlap = ovl;

991

992

}

993

994

static PetscErrorCode PCGASMSetType_GASM(PC pc,PCGASMType type)

995

{

996

PC_GASM *osm = (PC_GASM*)pc->data;

997

998

PetscFunctionBegindo { do { ; if (petscstack && (petscstack->currentsize
< 64)) { petscstack->function[petscstack->currentsize
] = __func__; petscstack->file[petscstack->currentsize]
= "/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
; petscstack->line[petscstack->currentsize] = 998; petscstack
->petscroutine[petscstack->currentsize] = PETSC_TRUE; petscstack
->currentsize++; } if (petscstack) { petscstack->hotdepth
+= (PETSC_FALSE || petscstack->hotdepth); } ; } while (0)
; ; } while (0);

999

osm->type = type;

1000

osm->type_set = PETSC_TRUE;

1001

1002

}

1003

1004

static PetscErrorCode PCGASMSetSortIndices_GASM(PC pc,PetscBool doSort)

1005

{

1006

PC_GASM *osm = (PC_GASM*)pc->data;

1007

1008

PetscFunctionBegindo { do { ; if (petscstack && (petscstack->currentsize
< 64)) { petscstack->function[petscstack->currentsize
] = __func__; petscstack->file[petscstack->currentsize]
= "/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
; petscstack->line[petscstack->currentsize] = 1008; petscstack
->petscroutine[petscstack->currentsize] = PETSC_TRUE; petscstack
->currentsize++; } if (petscstack) { petscstack->hotdepth
+= (PETSC_FALSE || petscstack->hotdepth); } ; } while (0)
; ; } while (0);

1009

osm->sort_indices = doSort;

1010

1011

}

1012

1013

1014

FIXME: This routine might need to be modified now that multiple ranks per subdomain are allowed.

1015

In particular, it would upset the global subdomain number calculation.

1016

1017

static PetscErrorCode PCGASMGetSubKSP_GASM(PC pc,PetscInt *n,PetscInt *first,KSP **ksp)

1018

{

1019

PC_GASM *osm = (PC_GASM*)pc->data;

1020

PetscErrorCode ierr;

1021

1022

PetscFunctionBegindo { do { ; if (petscstack && (petscstack->currentsize
< 64)) { petscstack->function[petscstack->currentsize
] = __func__; petscstack->file[petscstack->currentsize]
= "/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
; petscstack->line[petscstack->currentsize] = 1022; petscstack
->petscroutine[petscstack->currentsize] = PETSC_TRUE; petscstack
->currentsize++; } if (petscstack) { petscstack->hotdepth
+= (PETSC_FALSE || petscstack->hotdepth); } ; } while (0)
; ; } while (0);

1023

if (osm->n < 1) SETERRQ(PetscObjectComm((PetscObject)pc),PETSC_ERR_ORDER,"Need to call PCSetUP() on PC (or KSPSetUp() on the outer KSP object) before calling here")return PetscError(PetscObjectComm((PetscObject)pc),1023,__func__
,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c",58
,PETSC_ERROR_INITIAL,"Need to call PCSetUP() on PC (or KSPSetUp() on the outer KSP object) before calling here"
);

1024

1025

if (n) *n = osm->n;

1026

if (first) {

1027

ierr = MPI_Scan(&osm->n,first,1,MPIU_INT((MPI_Datatype)0x4c000405),MPI_SUM(MPI_Op)(0x58000003),PetscObjectComm((PetscObject)pc));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1027,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1028

*first -= osm->n;

1029

}

1030

if (ksp) {

1031

/* Assume that local solves are now different; not necessarily

1032

true, though! This flag is used only for PCView_GASM() */

1033

*ksp = osm->ksp;

1034

osm->same_subdomain_solvers = PETSC_FALSE;

1035

}

1036

1037

} /* PCGASMGetSubKSP_GASM() */

1038

1039

/*@C

1040

PCGASMSetSubdomains - Sets the subdomains for this processor

1041

for the additive Schwarz preconditioner.

1042

1043

Collective on pc

1044

1045

Input Parameters:

1046

+ pc - the preconditioner object

1047

. n - the number of subdomains for this processor

1048

. iis - the index sets that define the inner subdomains (or NULL for PETSc to determine subdomains)

1049

- ois - the index sets that define the outer subdomains (or NULL to use the same as iis, or to construct by expanding iis by the requested overlap)

1050

1051

Notes:

1052

The IS indices use the parallel, global numbering of the vector entries.

1053

Inner subdomains are those where the correction is applied.

1054

Outer subdomains are those where the residual necessary to obtain the

1055

corrections is obtained (see PCGASMType for the use of inner/outer subdomains).

1056

Both inner and outer subdomains can extend over several processors.

1057

This processor's portion of a subdomain is known as a local subdomain.

1058

1059

Inner subdomains can not overlap with each other, do not have any entities from remote processors,

1060

and have to cover the entire local subdomain owned by the current processor. The index sets on each

1061

process should be ordered such that the ith local subdomain is connected to the ith remote subdomain

1062

on another MPI process.

1063

1064

By default the GASM preconditioner uses 1 (local) subdomain per processor.

1065

1066

1067

Level: advanced

1068

1069

.seealso: PCGASMSetNumSubdomains(), PCGASMSetOverlap(), PCGASMGetSubKSP(),

1070

PCGASMCreateSubdomains2D(), PCGASMGetSubdomains()

1071

@*/

1072

PetscErrorCode PCGASMSetSubdomains(PC pc,PetscInt n,IS iis[],IS ois[])

1073

{

1074

PC_GASM *osm = (PC_GASM*)pc->data;

1075

PetscErrorCode ierr;

1076

1077

PetscFunctionBegindo { do { ; if (petscstack && (petscstack->currentsize
< 64)) { petscstack->function[petscstack->currentsize
] = __func__; petscstack->file[petscstack->currentsize]
= "/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
; petscstack->line[petscstack->currentsize] = 1077; petscstack
->petscroutine[petscstack->currentsize] = PETSC_TRUE; petscstack
->currentsize++; } if (petscstack) { petscstack->hotdepth
+= (PETSC_FALSE || petscstack->hotdepth); } ; } while (0)
; ; } while (0);

1078

PetscValidHeaderSpecific(pc,PC_CLASSID,1)do { if (!pc) return PetscError(((MPI_Comm)0x44000001),1078,__func__
,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c",85
,PETSC_ERROR_INITIAL,"Null Object: Parameter # %d",1); if (!PetscCheckPointer
(pc,PETSC_OBJECT)) return PetscError(((MPI_Comm)0x44000001),1078
,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,64,PETSC_ERROR_INITIAL,"Invalid Pointer to Object: Parameter # %d"
,1); if (((PetscObject)(pc))->classid != PC_CLASSID) { if (
((PetscObject)(pc))->classid == -1) return PetscError(((MPI_Comm
)0x44000001),1078,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,64,PETSC_ERROR_INITIAL,"Object already free: Parameter # %d"
,1); else return PetscError(((MPI_Comm)0x44000001),1078,__func__
,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c",62
,PETSC_ERROR_INITIAL,"Wrong type of object: Parameter # %d",1
); } } while (0);

1079

ierr = PetscTryMethod(pc,"PCGASMSetSubdomains_C",(PC,PetscInt,IS[],IS[]),(pc,n,iis,ois))0; do { PetscErrorCode (*f)(PC,PetscInt,IS[],IS[]), __ierr; __ierr
= PetscObjectQueryFunction_Private(((PetscObject)pc),("PCGASMSetSubdomains_C"
),(PetscVoidFunction*)(&f));do {if (__builtin_expect(!!(__ierr
),0)) return PetscError(((MPI_Comm)0x44000001),1079,__func__,
"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c",__ierr
,PETSC_ERROR_REPEAT," ");} while (0); if (f) {__ierr = (*f)(pc
,n,iis,ois);do {if (__builtin_expect(!!(__ierr),0)) return PetscError
(((MPI_Comm)0x44000001),1079,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,__ierr,PETSC_ERROR_REPEAT," ");} while (0);} } while(0);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1079,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1080

osm->dm_subdomains = PETSC_FALSE;

1081

1082

}

1083

1084

1085

/*@

1086

PCGASMSetOverlap - Sets the overlap between a pair of subdomains for the

1087

additive Schwarz preconditioner. Either all or no processors in the

1088

pc communicator must call this routine.

1089

1090

Logically Collective on pc

1091

1092

Input Parameters:

1093

+ pc - the preconditioner context

1094

- ovl - the amount of overlap between subdomains (ovl >= 0, default value = 0)

1095

1096

Options Database Key:

1097

. -pc_gasm_overlap <overlap> - Sets overlap

1098

1099

Notes:

1100

By default the GASM preconditioner uses 1 subdomain per processor. To use

1101

multiple subdomain per perocessor or "straddling" subdomains that intersect

1102

multiple processors use PCGASMSetSubdomains() (or option -pc_gasm_total_subdomains <n>).

1103

1104

The overlap defaults to 0, so if one desires that no additional

1105

overlap be computed beyond what may have been set with a call to

1106

PCGASMSetSubdomains(), then ovl must be set to be 0. In particular, if one does

1107

not explicitly set the subdomains in application code, then all overlap would be computed

1108

internally by PETSc, and using an overlap of 0 would result in an GASM

1109

variant that is equivalent to the block Jacobi preconditioner.

1110

1111

Note that one can define initial index sets with any overlap via

1112

PCGASMSetSubdomains(); the routine PCGASMSetOverlap() merely allows

1113

PETSc to extend that overlap further, if desired.

1114

1115

Level: intermediate

1116

1117

.seealso: PCGASMSetSubdomains(), PCGASMGetSubKSP(),

1118

PCGASMCreateSubdomains2D(), PCGASMGetSubdomains()

1119

@*/

1120

PetscErrorCode PCGASMSetOverlap(PC pc,PetscInt ovl)

1121

{

1122

PetscErrorCode ierr;

1123

PC_GASM *osm = (PC_GASM*)pc->data;

1124

1125

PetscFunctionBegindo { do { ; if (petscstack && (petscstack->currentsize
< 64)) { petscstack->function[petscstack->currentsize
] = __func__; petscstack->file[petscstack->currentsize]
= "/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
; petscstack->line[petscstack->currentsize] = 1125; petscstack
->petscroutine[petscstack->currentsize] = PETSC_TRUE; petscstack
->currentsize++; } if (petscstack) { petscstack->hotdepth
+= (PETSC_FALSE || petscstack->hotdepth); } ; } while (0)
; ; } while (0);

1126

PetscValidHeaderSpecific(pc,PC_CLASSID,1)do { if (!pc) return PetscError(((MPI_Comm)0x44000001),1126,__func__
,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c",85
,PETSC_ERROR_INITIAL,"Null Object: Parameter # %d",1); if (!PetscCheckPointer
(pc,PETSC_OBJECT)) return PetscError(((MPI_Comm)0x44000001),1126
,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,64,PETSC_ERROR_INITIAL,"Invalid Pointer to Object: Parameter # %d"
,1); if (((PetscObject)(pc))->classid != PC_CLASSID) { if (
((PetscObject)(pc))->classid == -1) return PetscError(((MPI_Comm
)0x44000001),1126,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,64,PETSC_ERROR_INITIAL,"Object already free: Parameter # %d"
,1); else return PetscError(((MPI_Comm)0x44000001),1126,__func__
,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c",62
,PETSC_ERROR_INITIAL,"Wrong type of object: Parameter # %d",1
); } } while (0);

1127

PetscValidLogicalCollectiveInt(pc,ovl,2)do { PetscErrorCode _7_ierr; PetscInt b1[2],b2[2]; b1[0] = -ovl
; b1[1] = ovl; _7_ierr = (PetscAllreduceBarrierCheck(PetscObjectComm
((PetscObject)pc),2,1127,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
) || ((petsc_allreduce_ct += PetscMPIParallelComm((PetscObjectComm
((PetscObject)pc))),0) || MPI_Allreduce((b1),(b2),(2),(((MPI_Datatype
)0x4c000405)),((MPI_Op)(0x58000001)),(PetscObjectComm((PetscObject
)pc)))));do {if (__builtin_expect(!!(_7_ierr),0)) return PetscError
(((MPI_Comm)0x44000001),1127,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,_7_ierr,PETSC_ERROR_REPEAT," ");} while (0); if (-b2[0] != b2
[1]) return PetscError(PetscObjectComm((PetscObject)pc),1127,
__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,62,PETSC_ERROR_INITIAL,"Int value must be same on all processes, argument # %d"
,2); } while (0);

1128

ierr = PetscTryMethod(pc,"PCGASMSetOverlap_C",(PC,PetscInt),(pc,ovl))0; do { PetscErrorCode (*f)(PC,PetscInt), __ierr; __ierr = PetscObjectQueryFunction_Private
(((PetscObject)pc),("PCGASMSetOverlap_C"),(PetscVoidFunction*
)(&f));do {if (__builtin_expect(!!(__ierr),0)) return PetscError
(((MPI_Comm)0x44000001),1128,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,__ierr,PETSC_ERROR_REPEAT," ");} while (0); if (f) {__ierr =
(*f)(pc,ovl);do {if (__builtin_expect(!!(__ierr),0)) return PetscError
(((MPI_Comm)0x44000001),1128,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,__ierr,PETSC_ERROR_REPEAT," ");} while (0);} } while(0);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1128,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1129

osm->dm_subdomains = PETSC_FALSE;

1130

1131

}

1132

1133

/*@

1134

PCGASMSetType - Sets the type of restriction and interpolation used

1135

for local problems in the additive Schwarz method.

1136

1137

Logically Collective on PC

1138

1139

Input Parameters:

1140

+ pc - the preconditioner context

1141

- type - variant of GASM, one of

1142

.vb

1143

PC_GASM_BASIC - full interpolation and restriction

1144

PC_GASM_RESTRICT - full restriction, local processor interpolation

1145

PC_GASM_INTERPOLATE - full interpolation, local processor restriction

1146

PC_GASM_NONE - local processor restriction and interpolation

1147

.ve

1148

1149

Options Database Key:

1150

. -pc_gasm_type [basic,restrict,interpolate,none] - Sets GASM type

1151

1152

Level: intermediate

1153

1154

.seealso: PCGASMSetSubdomains(), PCGASMGetSubKSP(),

1155

PCGASMCreateSubdomains2D()

1156

@*/

1157

PetscErrorCode PCGASMSetType(PC pc,PCGASMType type)

1158

{

1159

PetscErrorCode ierr;

1160

1161

PetscFunctionBegindo { do { ; if (petscstack && (petscstack->currentsize
< 64)) { petscstack->function[petscstack->currentsize
] = __func__; petscstack->file[petscstack->currentsize]
= "/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
; petscstack->line[petscstack->currentsize] = 1161; petscstack
->petscroutine[petscstack->currentsize] = PETSC_TRUE; petscstack
->currentsize++; } if (petscstack) { petscstack->hotdepth
+= (PETSC_FALSE || petscstack->hotdepth); } ; } while (0)
; ; } while (0);

1162

PetscValidHeaderSpecific(pc,PC_CLASSID,1)do { if (!pc) return PetscError(((MPI_Comm)0x44000001),1162,__func__
,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c",85
,PETSC_ERROR_INITIAL,"Null Object: Parameter # %d",1); if (!PetscCheckPointer
(pc,PETSC_OBJECT)) return PetscError(((MPI_Comm)0x44000001),1162
,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,64,PETSC_ERROR_INITIAL,"Invalid Pointer to Object: Parameter # %d"
,1); if (((PetscObject)(pc))->classid != PC_CLASSID) { if (
((PetscObject)(pc))->classid == -1) return PetscError(((MPI_Comm
)0x44000001),1162,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,64,PETSC_ERROR_INITIAL,"Object already free: Parameter # %d"
,1); else return PetscError(((MPI_Comm)0x44000001),1162,__func__
,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c",62
,PETSC_ERROR_INITIAL,"Wrong type of object: Parameter # %d",1
); } } while (0);

1163

PetscValidLogicalCollectiveEnum(pc,type,2)do { PetscErrorCode _7_ierr; PetscMPIInt b1[2],b2[2]; b1[0] =
-(PetscMPIInt)type; b1[1] = (PetscMPIInt)type; _7_ierr = (PetscAllreduceBarrierCheck
(PetscObjectComm((PetscObject)pc),2,1163,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
) || ((petsc_allreduce_ct += PetscMPIParallelComm((PetscObjectComm
((PetscObject)pc))),0) || MPI_Allreduce((b1),(b2),(2),(((MPI_Datatype
)0x4c000405)),((MPI_Op)(0x58000001)),(PetscObjectComm((PetscObject
)pc)))));do {if (__builtin_expect(!!(_7_ierr),0)) return PetscError
(((MPI_Comm)0x44000001),1163,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,_7_ierr,PETSC_ERROR_REPEAT," ");} while (0); if (-b2[0] != b2
[1]) return PetscError(PetscObjectComm((PetscObject)pc),1163,
__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,62,PETSC_ERROR_INITIAL,"Enum value must be same on all processes, argument # %d"
,2); } while (0);

1164

ierr = PetscTryMethod(pc,"PCGASMSetType_C",(PC,PCGASMType),(pc,type))0; do { PetscErrorCode (*f)(PC,PCGASMType), __ierr; __ierr = PetscObjectQueryFunction_Private
(((PetscObject)pc),("PCGASMSetType_C"),(PetscVoidFunction*)(&
f));do {if (__builtin_expect(!!(__ierr),0)) return PetscError
(((MPI_Comm)0x44000001),1164,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,__ierr,PETSC_ERROR_REPEAT," ");} while (0); if (f) {__ierr =
(*f)(pc,type);do {if (__builtin_expect(!!(__ierr),0)) return
PetscError(((MPI_Comm)0x44000001),1164,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,__ierr,PETSC_ERROR_REPEAT," ");} while (0);} } while(0);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1164,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1165

1166

}

1167

1168

/*@

1169

PCGASMSetSortIndices - Determines whether subdomain indices are sorted.

1170

1171

Logically Collective on PC

1172

1173

Input Parameters:

1174

+ pc - the preconditioner context

1175

- doSort - sort the subdomain indices

1176

1177

Level: intermediate

1178

1179

.seealso: PCGASMSetSubdomains(), PCGASMGetSubKSP(),

1180

PCGASMCreateSubdomains2D()

1181

@*/

1182

PetscErrorCode PCGASMSetSortIndices(PC pc,PetscBool doSort)

1183

{

1184

PetscErrorCode ierr;

1185

1186

PetscFunctionBegindo { do { ; if (petscstack && (petscstack->currentsize
< 64)) { petscstack->function[petscstack->currentsize
] = __func__; petscstack->file[petscstack->currentsize]
= "/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
; petscstack->line[petscstack->currentsize] = 1186; petscstack
->petscroutine[petscstack->currentsize] = PETSC_TRUE; petscstack
->currentsize++; } if (petscstack) { petscstack->hotdepth
+= (PETSC_FALSE || petscstack->hotdepth); } ; } while (0)
; ; } while (0);

1187

PetscValidHeaderSpecific(pc,PC_CLASSID,1)do { if (!pc) return PetscError(((MPI_Comm)0x44000001),1187,__func__
,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c",85
,PETSC_ERROR_INITIAL,"Null Object: Parameter # %d",1); if (!PetscCheckPointer
(pc,PETSC_OBJECT)) return PetscError(((MPI_Comm)0x44000001),1187
,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,64,PETSC_ERROR_INITIAL,"Invalid Pointer to Object: Parameter # %d"
,1); if (((PetscObject)(pc))->classid != PC_CLASSID) { if (
((PetscObject)(pc))->classid == -1) return PetscError(((MPI_Comm
)0x44000001),1187,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,64,PETSC_ERROR_INITIAL,"Object already free: Parameter # %d"
,1); else return PetscError(((MPI_Comm)0x44000001),1187,__func__
,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c",62
,PETSC_ERROR_INITIAL,"Wrong type of object: Parameter # %d",1
); } } while (0);

1188

PetscValidLogicalCollectiveBool(pc,doSort,2)do { PetscErrorCode _7_ierr; PetscMPIInt b1[2],b2[2]; b1[0] =
-(PetscMPIInt)doSort; b1[1] = (PetscMPIInt)doSort; _7_ierr =
(PetscAllreduceBarrierCheck(PetscObjectComm((PetscObject)pc)
,2,1188,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
) || ((petsc_allreduce_ct += PetscMPIParallelComm((PetscObjectComm
((PetscObject)pc))),0) || MPI_Allreduce((b1),(b2),(2),(((MPI_Datatype
)0x4c000405)),((MPI_Op)(0x58000001)),(PetscObjectComm((PetscObject
)pc)))));do {if (__builtin_expect(!!(_7_ierr),0)) return PetscError
(((MPI_Comm)0x44000001),1188,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,_7_ierr,PETSC_ERROR_REPEAT," ");} while (0); if (-b2[0] != b2
[1]) return PetscError(PetscObjectComm((PetscObject)pc),1188,
__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,62,PETSC_ERROR_INITIAL,"Bool value must be same on all processes, argument # %d"
,2); } while (0);

1189

ierr = PetscTryMethod(pc,"PCGASMSetSortIndices_C",(PC,PetscBool),(pc,doSort))0; do { PetscErrorCode (*f)(PC,PetscBool), __ierr; __ierr = PetscObjectQueryFunction_Private
(((PetscObject)pc),("PCGASMSetSortIndices_C"),(PetscVoidFunction
*)(&f));do {if (__builtin_expect(!!(__ierr),0)) return PetscError
(((MPI_Comm)0x44000001),1189,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,__ierr,PETSC_ERROR_REPEAT," ");} while (0); if (f) {__ierr =
(*f)(pc,doSort);do {if (__builtin_expect(!!(__ierr),0)) return
PetscError(((MPI_Comm)0x44000001),1189,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,__ierr,PETSC_ERROR_REPEAT," ");} while (0);} } while(0);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1189,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1190

1191

}

1192

1193

/*@C

1194

PCGASMGetSubKSP - Gets the local KSP contexts for all blocks on

1195

this processor.

1196

1197

Collective on PC iff first_local is requested

1198

1199

Input Parameter:

1200

. pc - the preconditioner context

1201

1202

Output Parameters:

1203

+ n_local - the number of blocks on this processor or NULL

1204

. first_local - the global number of the first block on this processor or NULL,

1205

all processors must request or all must pass NULL

1206

- ksp - the array of KSP contexts

1207

1208

Note:

1209

After PCGASMGetSubKSP() the array of KSPes is not to be freed

1210

1211

Currently for some matrix implementations only 1 block per processor

1212

is supported.

1213

1214

You must call KSPSetUp() before calling PCGASMGetSubKSP().

1215

1216

Level: advanced

1217

1218

.seealso: PCGASMSetSubdomains(), PCGASMSetOverlap(),

1219

PCGASMCreateSubdomains2D(),

1220

@*/

1221

PetscErrorCode PCGASMGetSubKSP(PC pc,PetscInt *n_local,PetscInt *first_local,KSP *ksp[])

1222

{

1223

PetscErrorCode ierr;

1224

1225

PetscFunctionBegindo { do { ; if (petscstack && (petscstack->currentsize
< 64)) { petscstack->function[petscstack->currentsize
] = __func__; petscstack->file[petscstack->currentsize]
= "/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
; petscstack->line[petscstack->currentsize] = 1225; petscstack
->petscroutine[petscstack->currentsize] = PETSC_TRUE; petscstack
->currentsize++; } if (petscstack) { petscstack->hotdepth
+= (PETSC_FALSE || petscstack->hotdepth); } ; } while (0)
; ; } while (0);

1226

PetscValidHeaderSpecific(pc,PC_CLASSID,1)do { if (!pc) return PetscError(((MPI_Comm)0x44000001),1226,__func__
,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c",85
,PETSC_ERROR_INITIAL,"Null Object: Parameter # %d",1); if (!PetscCheckPointer
(pc,PETSC_OBJECT)) return PetscError(((MPI_Comm)0x44000001),1226
,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,64,PETSC_ERROR_INITIAL,"Invalid Pointer to Object: Parameter # %d"
,1); if (((PetscObject)(pc))->classid != PC_CLASSID) { if (
((PetscObject)(pc))->classid == -1) return PetscError(((MPI_Comm
)0x44000001),1226,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,64,PETSC_ERROR_INITIAL,"Object already free: Parameter # %d"
,1); else return PetscError(((MPI_Comm)0x44000001),1226,__func__
,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c",62
,PETSC_ERROR_INITIAL,"Wrong type of object: Parameter # %d",1
); } } while (0);

1227

ierr = PetscUseMethod(pc,"PCGASMGetSubKSP_C",(PC,PetscInt*,PetscInt*,KSP **),(pc,n_local,first_local,ksp))0; do { PetscErrorCode (*f)(PC,PetscInt*,PetscInt*,KSP **), __ierr
; __ierr = PetscObjectQueryFunction_Private(((PetscObject)pc)
,("PCGASMGetSubKSP_C"),(PetscVoidFunction*)(&f));do {if (
__builtin_expect(!!(__ierr),0)) return PetscError(((MPI_Comm)
0x44000001),1227,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,__ierr,PETSC_ERROR_REPEAT," ");} while (0); if (f) {__ierr =
(*f)(pc,n_local,first_local,ksp);do {if (__builtin_expect(!!
(__ierr),0)) return PetscError(((MPI_Comm)0x44000001),1227,__func__
,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c",__ierr
,PETSC_ERROR_REPEAT," ");} while (0);} else return PetscError
(PetscObjectComm((PetscObject)pc),1227,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,56,PETSC_ERROR_INITIAL,"Cannot locate function %s in object"
,"PCGASMGetSubKSP_C"); } while(0);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1227,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1228

1229

}

1230

1231

/* -------------------------------------------------------------------------------------*/

1232

/*MC

1233

PCGASM - Use the (restricted) additive Schwarz method, each block is (approximately) solved with

1234

its own KSP object.

1235

1236

Options Database Keys:

1237

+ -pc_gasm_total_subdomains <n> - Sets total number of local subdomains to be distributed among processors

1238

. -pc_gasm_view_subdomains - activates the printing of subdomain indices in PCView(), -ksp_view or -snes_view

1239

. -pc_gasm_print_subdomains - activates the printing of subdomain indices in PCSetUp()

1240

. -pc_gasm_overlap <ovl> - Sets overlap by which to (automatically) extend local subdomains

1241

- -pc_gasm_type [basic,restrict,interpolate,none] - Sets GASM type

1242

1243

IMPORTANT: If you run with, for example, 3 blocks on 1 processor or 3 blocks on 3 processors you

1244

will get a different convergence rate due to the default option of -pc_gasm_type restrict. Use

1245

-pc_gasm_type basic to use the standard GASM.

1246

1247

Notes:

1248

Blocks can be shared by multiple processes.

1249

1250

To set options on the solvers for each block append -sub_ to all the KSP, and PC

1251

options database keys. For example, -sub_pc_type ilu -sub_pc_factor_levels 1 -sub_ksp_type preonly

1252

1253

To set the options on the solvers separate for each block call PCGASMGetSubKSP()

1254

and set the options directly on the resulting KSP object (you can access its PC

1255

with KSPGetPC())

1256

1257

1258

Level: beginner

1259

1260

References:

1261

+ 1. - M Dryja, OB Widlund, An additive variant of the Schwarz alternating method for the case of many subregions

1262

Courant Institute, New York University Technical report

1263

- 2. - Barry Smith, Petter Bjorstad, and William Gropp, Domain Decompositions: Parallel Multilevel Methods for Elliptic Partial Differential Equations,

1264

Cambridge University Press.

1265

1266

.seealso: PCCreate(), PCSetType(), PCType (for list of available types), PC,

1267

PCBJACOBI, PCGASMGetSubKSP(), PCGASMSetSubdomains(),

1268

PCSetModifySubmatrices(), PCGASMSetOverlap(), PCGASMSetType()

1269

1270

M*/

1271

1272

PETSC_EXTERNextern __attribute__((visibility ("default"))) PetscErrorCode PCCreate_GASM(PC pc)

1273

{

1274

PetscErrorCode ierr;

1275

PC_GASM *osm;

1276

1277

PetscFunctionBegindo { do { ; if (petscstack && (petscstack->currentsize
< 64)) { petscstack->function[petscstack->currentsize
] = __func__; petscstack->file[petscstack->currentsize]
= "/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
; petscstack->line[petscstack->currentsize] = 1277; petscstack
->petscroutine[petscstack->currentsize] = PETSC_TRUE; petscstack
->currentsize++; } if (petscstack) { petscstack->hotdepth
+= (PETSC_FALSE || petscstack->hotdepth); } ; } while (0)
; ; } while (0);

1278

ierr = PetscNewLog(pc,&osm)(PetscMallocA(1,PETSC_TRUE,1278,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,(size_t)(1)*sizeof(**(((&osm)))),(((&osm)))) || PetscLogObjectMemory
((PetscObject)pc,sizeof(**(&osm))));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1278,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1279

1280

osm->N = PETSC_DETERMINE-1;

1281

osm->n = PETSC_DECIDE-1;

1282

osm->nmax = PETSC_DETERMINE-1;

1283

osm->overlap = 0;

1284

osm->ksp = 0;

1285

osm->gorestriction = 0;

1286

osm->girestriction = 0;

1287

osm->pctoouter = 0;

1288

osm->gx = 0;

1289

osm->gy = 0;

1290

osm->x = 0;

1291

osm->y = 0;

1292

osm->pcx = 0;

1293

osm->pcy = 0;

1294

osm->permutationIS = 0;

1295

osm->permutationP = 0;

1296

osm->pcmat = 0;

1297

osm->ois = 0;

1298

osm->iis = 0;

1299

osm->pmat = 0;

1300

osm->type = PC_GASM_RESTRICT;

1301

osm->same_subdomain_solvers = PETSC_TRUE;

1302

osm->sort_indices = PETSC_TRUE;

1303

osm->dm_subdomains = PETSC_FALSE;

1304

osm->hierarchicalpartitioning = PETSC_FALSE;

1305

1306

pc->data = (void*)osm;

1307

pc->ops->apply = PCApply_GASM;

1308

pc->ops->applytranspose = PCApplyTranspose_GASM;

1309

pc->ops->setup = PCSetUp_GASM;

1310

pc->ops->reset = PCReset_GASM;

1311

pc->ops->destroy = PCDestroy_GASM;

1312

pc->ops->setfromoptions = PCSetFromOptions_GASM;

1313

pc->ops->setuponblocks = PCSetUpOnBlocks_GASM;

1314

pc->ops->view = PCView_GASM;

1315

pc->ops->applyrichardson = 0;

1316

1317

ierr = PetscObjectComposeFunction((PetscObject)pc,"PCGASMSetSubdomains_C",PCGASMSetSubdomains_GASM)PetscObjectComposeFunction_Private((PetscObject)pc,"PCGASMSetSubdomains_C"
,(PetscVoidFunction)(PCGASMSetSubdomains_GASM));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1317,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1318

ierr = PetscObjectComposeFunction((PetscObject)pc,"PCGASMSetOverlap_C",PCGASMSetOverlap_GASM)PetscObjectComposeFunction_Private((PetscObject)pc,"PCGASMSetOverlap_C"
,(PetscVoidFunction)(PCGASMSetOverlap_GASM));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1318,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1319

ierr = PetscObjectComposeFunction((PetscObject)pc,"PCGASMSetType_C",PCGASMSetType_GASM)PetscObjectComposeFunction_Private((PetscObject)pc,"PCGASMSetType_C"
,(PetscVoidFunction)(PCGASMSetType_GASM));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1319,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1320

ierr = PetscObjectComposeFunction((PetscObject)pc,"PCGASMSetSortIndices_C",PCGASMSetSortIndices_GASM)PetscObjectComposeFunction_Private((PetscObject)pc,"PCGASMSetSortIndices_C"
,(PetscVoidFunction)(PCGASMSetSortIndices_GASM));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1320,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1321

ierr = PetscObjectComposeFunction((PetscObject)pc,"PCGASMGetSubKSP_C",PCGASMGetSubKSP_GASM)PetscObjectComposeFunction_Private((PetscObject)pc,"PCGASMGetSubKSP_C"
,(PetscVoidFunction)(PCGASMGetSubKSP_GASM));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1321,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1322

1323

}

1324

1325

1326

PetscErrorCode PCGASMCreateLocalSubdomains(Mat A, PetscInt nloc, IS *iis[])

1327

{

1328

MatPartitioning mpart;

1329

const char *prefix;

1330

PetscInt i,j,rstart,rend,bs;

1331

PetscBool hasop, isbaij = PETSC_FALSE,foundpart = PETSC_FALSE;

1332

Mat Ad = NULL((void*)0), adj;

1333

IS ispart,isnumb,*is;

1334

PetscErrorCode ierr;

1335

1336

PetscFunctionBegindo { do { ; if (petscstack && (petscstack->currentsize
< 64)) { petscstack->function[petscstack->currentsize
] = __func__; petscstack->file[petscstack->currentsize]
= "/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
; petscstack->line[petscstack->currentsize] = 1336; petscstack
->petscroutine[petscstack->currentsize] = PETSC_TRUE; petscstack
->currentsize++; } if (petscstack) { petscstack->hotdepth
+= (PETSC_FALSE || petscstack->hotdepth); } ; } while (0)
; ; } while (0);

1337

if (nloc < 1) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_ARG_WRONG,"number of local subdomains must > 0, got nloc = %D",nloc)return PetscError(((MPI_Comm)0x44000001),1337,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,62,PETSC_ERROR_INITIAL,"number of local subdomains must > 0, got nloc = %D"
,nloc);

1338

1339

/* Get prefix, row distribution, and block size */

1340

ierr = MatGetOptionsPrefix(A,&prefix);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1340,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1341

ierr = MatGetOwnershipRange(A,&rstart,&rend);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1341,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1342

ierr = MatGetBlockSize(A,&bs);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1342,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1343

if (rstart/bs*bs != rstart || rend/bs*bs != rend) SETERRQ3(PETSC_COMM_SELF,PETSC_ERR_ARG_WRONG,"bad row distribution [%D,%D) for matrix block size %D",rstart,rend,bs)return PetscError(((MPI_Comm)0x44000001),1343,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,62,PETSC_ERROR_INITIAL,"bad row distribution [%D,%D) for matrix block size %D"
,rstart,rend,bs);

1344

1345

/* Get diagonal block from matrix if possible */

1346

ierr = MatHasOperation(A,MATOP_GET_DIAGONAL_BLOCK,&hasop);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1346,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1347

if (hasop) {

1348

ierr = MatGetDiagonalBlock(A,&Ad);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1348,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1349

}

1350

if (Ad) {

1351

ierr = PetscObjectTypeCompare((PetscObject)Ad,MATSEQBAIJ"seqbaij",&isbaij);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1351,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1352

if (!isbaij) {ierr = PetscObjectTypeCompare((PetscObject)Ad,MATSEQSBAIJ"seqsbaij",&isbaij);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1352,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);}

1353

}

1354

if (Ad && nloc > 1) {

1355

PetscBool match,done;

1356

/* Try to setup a good matrix partitioning if available */

1357

ierr = MatPartitioningCreate(PETSC_COMM_SELF((MPI_Comm)0x44000001),&mpart);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1357,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1358

ierr = PetscObjectSetOptionsPrefix((PetscObject)mpart,prefix);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1358,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1359

ierr = MatPartitioningSetFromOptions(mpart);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1359,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1360

ierr = PetscObjectTypeCompare((PetscObject)mpart,MATPARTITIONINGCURRENT"current",&match);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1360,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1361

if (!match) {

1362

ierr = PetscObjectTypeCompare((PetscObject)mpart,MATPARTITIONINGSQUARE"square",&match);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1362,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1363

}

1364

if (!match) { /* assume a "good" partitioner is available */

1365

PetscInt na;

1366

const PetscInt *ia,*ja;

1367

ierr = MatGetRowIJ(Ad,0,PETSC_TRUE,isbaij,&na,&ia,&ja,&done);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1367,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1368

if (done) {

1369

/* Build adjacency matrix by hand. Unfortunately a call to

1370

MatConvert(Ad,MATMPIADJ,MAT_INITIAL_MATRIX,&adj) will

1371

remove the block-aij structure and we cannot expect

1372

MatPartitioning to split vertices as we need */

1373

PetscInt i,j,len,nnz,cnt,*iia=0,*jja=0;

1374

const PetscInt *row;

1375

nnz = 0;

1376

for (i=0; i<na; i++) { /* count number of nonzeros */

1377

len = ia[i+1] - ia[i];

1378

row = ja + ia[i];

1379

for (j=0; j<len; j++) {

1380

if (row[j] == i) { /* don't count diagonal */

1381

len--; break;

1382

}

1383

}

1384

nnz += len;

1385

}

1386

ierr = PetscMalloc1(na+1,&iia)PetscMallocA(1,PETSC_FALSE,1386,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,(size_t)(na+1)*sizeof(**(&iia)),(&iia));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1386,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1387

ierr = PetscMalloc1(nnz,&jja)PetscMallocA(1,PETSC_FALSE,1387,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,(size_t)(nnz)*sizeof(**(&jja)),(&jja));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1387,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1388

nnz = 0;

1389

iia[0] = 0;

1390

for (i=0; i<na; i++) { /* fill adjacency */

1391

cnt = 0;

1392

len = ia[i+1] - ia[i];

1393

row = ja + ia[i];

1394

for (j=0; j<len; j++) {

1395

if (row[j] != i) jja[nnz+cnt++] = row[j]; /* if not diagonal */

1396

}

1397

nnz += cnt;

1398

iia[i+1] = nnz;

1399

}

1400

/* Partitioning of the adjacency matrix */

1401

ierr = MatCreateMPIAdj(PETSC_COMM_SELF((MPI_Comm)0x44000001),na,na,iia,jja,NULL((void*)0),&adj);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1401,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1402

ierr = MatPartitioningSetAdjacency(mpart,adj);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1402,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1403

ierr = MatPartitioningSetNParts(mpart,nloc);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1403,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1404

ierr = MatPartitioningApply(mpart,&ispart);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1404,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1405

ierr = ISPartitioningToNumbering(ispart,&isnumb);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1405,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1406

ierr = MatDestroy(&adj);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1406,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1407

foundpart = PETSC_TRUE;

1408

}

1409

ierr = MatRestoreRowIJ(Ad,0,PETSC_TRUE,isbaij,&na,&ia,&ja,&done);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1409,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1410

}

1411

ierr = MatPartitioningDestroy(&mpart);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1411,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1412

}

1413

ierr = PetscMalloc1(nloc,&is)PetscMallocA(1,PETSC_FALSE,1413,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,(size_t)(nloc)*sizeof(**(&is)),(&is));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1413,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1414

if (!foundpart) {

1415

1416

/* Partitioning by contiguous chunks of rows */

1417

1418

PetscInt mbs = (rend-rstart)/bs;

1419

PetscInt start = rstart;

1420

for (i=0; i<nloc; i++) {

1421

PetscInt count = (mbs/nloc + ((mbs % nloc) > i)) * bs;

1422

ierr = ISCreateStride(PETSC_COMM_SELF((MPI_Comm)0x44000001),count,start,1,&is[i]);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1422,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1423

start += count;

1424

}

1425

1426

} else {

1427

1428

/* Partitioning by adjacency of diagonal block */

1429

1430

const PetscInt *numbering;

1431

PetscInt *count,nidx,*indices,*newidx,start=0;

1432

/* Get node count in each partition */

1433

ierr = PetscMalloc1(nloc,&count)PetscMallocA(1,PETSC_FALSE,1433,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,(size_t)(nloc)*sizeof(**(&count)),(&count));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1433,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1434

ierr = ISPartitioningCount(ispart,nloc,count);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1434,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1435

if (isbaij && bs > 1) { /* adjust for the block-aij case */

1436

for (i=0; i<nloc; i++) count[i] *= bs;

1437

}

1438

/* Build indices from node numbering */

1439

ierr = ISGetLocalSize(isnumb,&nidx);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1439,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1440

ierr = PetscMalloc1(nidx,&indices)PetscMallocA(1,PETSC_FALSE,1440,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,(size_t)(nidx)*sizeof(**(&indices)),(&indices));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1440,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1441

for (i=0; i<nidx; i++) indices[i] = i; /* needs to be initialized */

1442

ierr = ISGetIndices(isnumb,&numbering);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1442,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1443

ierr = PetscSortIntWithPermutation(nidx,numbering,indices);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1443,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1444

ierr = ISRestoreIndices(isnumb,&numbering);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1444,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1445

if (isbaij && bs > 1) { /* adjust for the block-aij case */

1446

ierr = PetscMalloc1(nidx*bs,&newidx)PetscMallocA(1,PETSC_FALSE,1446,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,(size_t)(nidx*bs)*sizeof(**(&newidx)),(&newidx));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1446,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1447

for (i=0; i<nidx; i++) {

1448

for (j=0; j<bs; j++) newidx[i*bs+j] = indices[i]*bs + j;

1449

}

1450

ierr = PetscFree(indices)((*PetscTrFree)((void*)(indices),1450,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
) || ((indices) = 0,0));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1450,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1451

nidx *= bs;

1452

indices = newidx;

1453

}

1454

/* Shift to get global indices */

1455

for (i=0; i<nidx; i++) indices[i] += rstart;

1456

1457

/* Build the index sets for each block */

1458

for (i=0; i<nloc; i++) {

1459

ierr = ISCreateGeneral(PETSC_COMM_SELF((MPI_Comm)0x44000001),count[i],&indices[start],PETSC_COPY_VALUES,&is[i]);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1459,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1460

ierr = ISSort(is[i]);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1460,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1461

start += count[i];

1462

}

1463

1464

ierr = PetscFree(count)((*PetscTrFree)((void*)(count),1464,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
) || ((count) = 0,0));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1464,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1465

ierr = PetscFree(indices)((*PetscTrFree)((void*)(indices),1465,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
) || ((indices) = 0,0));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1465,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1466

ierr = ISDestroy(&isnumb);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1466,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1467

ierr = ISDestroy(&ispart);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1467,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1468

}

1469

*iis = is;

1470

1471

}

1472

1473

PETSC_INTERNextern __attribute__((visibility ("hidden"))) PetscErrorCode PCGASMCreateStraddlingSubdomains(Mat A,PetscInt N,PetscInt *n,IS *iis[])

1474

{

1475

PetscErrorCode ierr;

1476

1477

PetscFunctionBegindo { do { ; if (petscstack && (petscstack->currentsize
< 64)) { petscstack->function[petscstack->currentsize
] = __func__; petscstack->file[petscstack->currentsize]
= "/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
; petscstack->line[petscstack->currentsize] = 1477; petscstack
->petscroutine[petscstack->currentsize] = PETSC_TRUE; petscstack
->currentsize++; } if (petscstack) { petscstack->hotdepth
+= (PETSC_FALSE || petscstack->hotdepth); } ; } while (0)
; ; } while (0);

1478

ierr = MatSubdomainsCreateCoalesce(A,N,n,iis);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1478,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1479

1480

}

1481

1482

1483

1484

/*@C

1485

PCGASMCreateSubdomains - Creates n index sets defining n nonoverlapping subdomains for the additive

1486

Schwarz preconditioner for a any problem based on its matrix.

1487

1488

Collective

1489

1490

Input Parameters:

1491

+ A - The global matrix operator

1492

- N - the number of global subdomains requested

1493

1494

Output Parameters:

1495

+ n - the number of subdomains created on this processor

1496

- iis - the array of index sets defining the local inner subdomains (on which the correction is applied)

1497

1498

Level: advanced

1499

1500

Note: When N >= A's communicator size, each subdomain is local -- contained within a single processor.

1501

When N < size, the subdomains are 'straddling' (processor boundaries) and are no longer local.

1502

The resulting subdomains can be use in PCGASMSetSubdomains(pc,n,iss,NULL). The overlapping

1503

outer subdomains will be automatically generated from these according to the requested amount of

1504

overlap; this is currently supported only with local subdomains.

1505

1506

1507

.seealso: PCGASMSetSubdomains(), PCGASMDestroySubdomains()

1508

@*/

1509

PetscErrorCode PCGASMCreateSubdomains(Mat A,PetscInt N,PetscInt *n,IS *iis[])

1510

{

1511

PetscMPIInt size;

1512

PetscErrorCode ierr;

1513

1514

PetscFunctionBegindo { do { ; if (petscstack && (petscstack->currentsize
< 64)) { petscstack->function[petscstack->currentsize
] = __func__; petscstack->file[petscstack->currentsize]
= "/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
; petscstack->line[petscstack->currentsize] = 1514; petscstack
->petscroutine[petscstack->currentsize] = PETSC_TRUE; petscstack
->currentsize++; } if (petscstack) { petscstack->hotdepth
+= (PETSC_FALSE || petscstack->hotdepth); } ; } while (0)
; ; } while (0);

1515

PetscValidHeaderSpecific(A,MAT_CLASSID,1)do { if (!A) return PetscError(((MPI_Comm)0x44000001),1515,__func__
,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c",85
,PETSC_ERROR_INITIAL,"Null Object: Parameter # %d",1); if (!PetscCheckPointer
(A,PETSC_OBJECT)) return PetscError(((MPI_Comm)0x44000001),1515
,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,64,PETSC_ERROR_INITIAL,"Invalid Pointer to Object: Parameter # %d"
,1); if (((PetscObject)(A))->classid != MAT_CLASSID) { if (
((PetscObject)(A))->classid == -1) return PetscError(((MPI_Comm
)0x44000001),1515,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,64,PETSC_ERROR_INITIAL,"Object already free: Parameter # %d"
,1); else return PetscError(((MPI_Comm)0x44000001),1515,__func__
,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c",62
,PETSC_ERROR_INITIAL,"Wrong type of object: Parameter # %d",1
); } } while (0);

1516

PetscValidPointer(iis,4)do { if (!iis) return PetscError(((MPI_Comm)0x44000001),1516,
__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,85,PETSC_ERROR_INITIAL,"Null Pointer: Parameter # %d",4); if
(!PetscCheckPointer(iis,PETSC_CHAR)) return PetscError(((MPI_Comm
)0x44000001),1516,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,68,PETSC_ERROR_INITIAL,"Invalid Pointer: Parameter # %d",4);
} while (0);

1517

1518

if (N < 1) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_ARG_WRONG,"Number of subdomains must be > 0, N = %D",N)return PetscError(((MPI_Comm)0x44000001),1518,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,62,PETSC_ERROR_INITIAL,"Number of subdomains must be > 0, N = %D"
,N);

1519

ierr = MPI_Comm_size(PetscObjectComm((PetscObject)A),&size);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1519,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1520

if (N >= size) {

1521

*n = N/size + (N%size);

1522

ierr = PCGASMCreateLocalSubdomains(A,*n,iis);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1522,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1523

} else {

1524

ierr = PCGASMCreateStraddlingSubdomains(A,N,n,iis);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1524,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1525

}

1526

1527

}

1528

1529

/*@C

1530

PCGASMDestroySubdomains - Destroys the index sets created with

1531

PCGASMCreateSubdomains() or PCGASMCreateSubdomains2D. Should be

1532

called after setting subdomains with PCGASMSetSubdomains().

1533

1534

Collective

1535

1536

Input Parameters:

1537

+ n - the number of index sets

1538

. iis - the array of inner subdomains,

1539

- ois - the array of outer subdomains, can be NULL

1540

1541

Level: intermediate

1542

1543

Notes:

1544

this is merely a convenience subroutine that walks each list,

1545

destroys each IS on the list, and then frees the list. At the end the

1546

list pointers are set to NULL.

1547

1548

.seealso: PCGASMCreateSubdomains(), PCGASMSetSubdomains()

1549

@*/

1550

PetscErrorCode PCGASMDestroySubdomains(PetscInt n,IS **iis,IS **ois)

1551

{

1552

PetscInt i;

1553

PetscErrorCode ierr;

1554

1555

PetscFunctionBegindo { do { ; if (petscstack && (petscstack->currentsize
< 64)) { petscstack->function[petscstack->currentsize
] = __func__; petscstack->file[petscstack->currentsize]
= "/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
; petscstack->line[petscstack->currentsize] = 1555; petscstack
->petscroutine[petscstack->currentsize] = PETSC_TRUE; petscstack
->currentsize++; } if (petscstack) { petscstack->hotdepth
+= (PETSC_FALSE || petscstack->hotdepth); } ; } while (0)
; ; } while (0);

1556

if (n <= 0) PetscFunctionReturn(0)do { do { ; if (petscstack && petscstack->currentsize
> 0) { petscstack->currentsize--; petscstack->function
[petscstack->currentsize] = 0; petscstack->file[petscstack
->currentsize] = 0; petscstack->line[petscstack->currentsize
] = 0; petscstack->petscroutine[petscstack->currentsize
] = PETSC_FALSE; } if (petscstack) { petscstack->hotdepth =
(((petscstack->hotdepth-1)<(0)) ? (0) : (petscstack->
hotdepth-1)); } ; } while (0); return(0);} while (0);

1557

if (ois) {

1558

PetscValidPointer(ois,3)do { if (!ois) return PetscError(((MPI_Comm)0x44000001),1558,
__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,85,PETSC_ERROR_INITIAL,"Null Pointer: Parameter # %d",3); if
(!PetscCheckPointer(ois,PETSC_CHAR)) return PetscError(((MPI_Comm
)0x44000001),1558,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,68,PETSC_ERROR_INITIAL,"Invalid Pointer: Parameter # %d",3);
} while (0);

1559

if (*ois) {

1560

PetscValidPointer(*ois,3)do { if (!*ois) return PetscError(((MPI_Comm)0x44000001),1560
,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,85,PETSC_ERROR_INITIAL,"Null Pointer: Parameter # %d",3); if
(!PetscCheckPointer(*ois,PETSC_CHAR)) return PetscError(((MPI_Comm
)0x44000001),1560,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,68,PETSC_ERROR_INITIAL,"Invalid Pointer: Parameter # %d",3);
} while (0);

1561

for (i=0; i<n; i++) {

1562

ierr = ISDestroy(&(*ois)[i]);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1562,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1563

}

1564

ierr = PetscFree((*ois))((*PetscTrFree)((void*)((*ois)),1564,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
) || (((*ois)) = 0,0));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1564,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1565

}

1566

}

1567

if (iis) {

1568

PetscValidPointer(iis,2)do { if (!iis) return PetscError(((MPI_Comm)0x44000001),1568,
__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,85,PETSC_ERROR_INITIAL,"Null Pointer: Parameter # %d",2); if
(!PetscCheckPointer(iis,PETSC_CHAR)) return PetscError(((MPI_Comm
)0x44000001),1568,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,68,PETSC_ERROR_INITIAL,"Invalid Pointer: Parameter # %d",2);
} while (0);

1569

if (*iis) {

1570

PetscValidPointer(*iis,2)do { if (!*iis) return PetscError(((MPI_Comm)0x44000001),1570
,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,85,PETSC_ERROR_INITIAL,"Null Pointer: Parameter # %d",2); if
(!PetscCheckPointer(*iis,PETSC_CHAR)) return PetscError(((MPI_Comm
)0x44000001),1570,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,68,PETSC_ERROR_INITIAL,"Invalid Pointer: Parameter # %d",2);
} while (0);

1571

for (i=0; i<n; i++) {

1572

ierr = ISDestroy(&(*iis)[i]);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1572,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1573

}

1574

ierr = PetscFree((*iis))((*PetscTrFree)((void*)((*iis)),1574,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
) || (((*iis)) = 0,0));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1574,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1575

}

1576

}

1577

1578

}

1579

1580

1581

#define PCGASMLocalSubdomainBounds2D(M,N,xleft,ylow,xright,yhigh,first,last,xleft_loc,ylow_loc,xright_loc,yhigh_loc,n){ PetscInt first_row = first/M, last_row = last/M+1; *ylow_loc
= (((first_row)<(ylow)) ? (ylow) : (first_row)); *xleft_loc
= *ylow_loc==first_row ? (((first%M)<(xleft)) ? (xleft) :
(first%M)) : xleft; *yhigh_loc = (((last_row)<(yhigh)) ? (
last_row) : (yhigh)); *xright_loc = *yhigh_loc==last_row ? ((
(xright)<(last%M)) ? (xright) : (last%M)) : xright; *n = 0
; if (*ylow_loc < *yhigh_loc) { PetscInt width = xright-xleft
; *n += width*(*yhigh_loc-*ylow_loc-1); *n += ((((((*xright_loc
-xleft)<(0)) ? (0) : (*xright_loc-xleft)))<(width)) ? (
(((*xright_loc-xleft)<(0)) ? (0) : (*xright_loc-xleft))) :
(width)); *n -= ((((((*xleft_loc-xleft)<(0)) ? (0) : (*xleft_loc
-xleft)))<(width)) ? ((((*xleft_loc-xleft)<(0)) ? (0) :
(*xleft_loc-xleft))) : (width)); } } \

1582

{ \

1583

PetscInt first_row = first/M, last_row = last/M+1; \

1584

/* \

1585

Compute ylow_loc and yhigh_loc so that (ylow_loc,xleft) and (yhigh_loc,xright) are the corners \

1586

of the bounding box of the intersection of the subdomain with the local ownership range (local \

1587

subdomain). \

1588

Also compute xleft_loc and xright_loc as the lower and upper bounds on the first and last rows \

1589

of the intersection. \

1590

*/ \

1591

/* ylow_loc is the grid row containing the first element of the local sumbdomain */ \

1592

*ylow_loc = PetscMax(first_row,ylow)(((first_row)<(ylow)) ? (ylow) : (first_row)); \

1593

/* xleft_loc is the offset of first element of the local subdomain within its grid row (might actually be outside the local subdomain) */ \

1594

*xleft_loc = *ylow_loc==first_row ? PetscMax(first%M,xleft)(((first%M)<(xleft)) ? (xleft) : (first%M)) : xleft; \

1595

/* yhigh_loc is the grid row above the last local subdomain element */ \

1596

*yhigh_loc = PetscMin(last_row,yhigh)(((last_row)<(yhigh)) ? (last_row) : (yhigh)); \

1597

/* xright is the offset of the end of the local subdomain within its grid row (might actually be outside the local subdomain) */ \

1598

*xright_loc = *yhigh_loc==last_row ? PetscMin(xright,last%M)(((xright)<(last%M)) ? (xright) : (last%M)) : xright; \

1599

/* Now compute the size of the local subdomain n. */ \

1600

*n = 0; \

1601

if (*ylow_loc < *yhigh_loc) { \

1602

PetscInt width = xright-xleft; \

1603

*n += width*(*yhigh_loc-*ylow_loc-1); \

1604

*n += PetscMin(PetscMax(*xright_loc-xleft,0),width)((((((*xright_loc-xleft)<(0)) ? (0) : (*xright_loc-xleft))
)<(width)) ? ((((*xright_loc-xleft)<(0)) ? (0) : (*xright_loc
-xleft))) : (width)); \

1605

*n -= PetscMin(PetscMax(*xleft_loc-xleft,0), width)((((((*xleft_loc-xleft)<(0)) ? (0) : (*xleft_loc-xleft)))<
(width)) ? ((((*xleft_loc-xleft)<(0)) ? (0) : (*xleft_loc-
xleft))) : (width)); \

1606

} \

1607

}

1608

1609

1610

1611

/*@

1612

PCGASMCreateSubdomains2D - Creates the index sets for the overlapping Schwarz

1613

preconditioner for a two-dimensional problem on a regular grid.

1614

1615

Collective

1616

1617

Input Parameters:

1618

+ M, N - the global number of grid points in the x and y directions

1619

. Mdomains, Ndomains - the global number of subdomains in the x and y directions

1620

. dof - degrees of freedom per node

1621

- overlap - overlap in mesh lines

1622

1623

Output Parameters:

1624

+ Nsub - the number of local subdomains created

1625

. iis - array of index sets defining inner (nonoverlapping) subdomains

1626

- ois - array of index sets defining outer (overlapping, if overlap > 0) subdomains

1627

1628

1629

Level: advanced

1630

1631

.seealso: PCGASMSetSubdomains(), PCGASMGetSubKSP(), PCGASMSetOverlap()

1632

@*/

1633

PetscErrorCode PCGASMCreateSubdomains2D(PC pc,PetscInt M,PetscInt N,PetscInt Mdomains,PetscInt Ndomains,PetscInt dof,PetscInt overlap,PetscInt *nsub,IS **iis,IS **ois)

1634

{

1635

PetscErrorCode ierr;

1636

PetscMPIInt size, rank;

1637

PetscInt i, j;

1638

PetscInt maxheight, maxwidth;

1639

PetscInt xstart, xleft, xright, xleft_loc, xright_loc;

1640

PetscInt ystart, ylow, yhigh, ylow_loc, yhigh_loc;

1641

PetscInt x[2][2], y[2][2], n[2];

1642

PetscInt first, last;

1643

PetscInt nidx, *idx;

1644

PetscInt ii,jj,s,q,d;

1645

PetscInt k,kk;

1646

PetscMPIInt color;

1647

MPI_Comm comm, subcomm;

1648

IS **xis = 0, **is = ois, **is_local = iis;

1649

1650

PetscFunctionBegindo { do { ; if (petscstack && (petscstack->currentsize
< 64)) { petscstack->function[petscstack->currentsize
] = __func__; petscstack->file[petscstack->currentsize]
= "/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
; petscstack->line[petscstack->currentsize] = 1650; petscstack
->petscroutine[petscstack->currentsize] = PETSC_TRUE; petscstack
->currentsize++; } if (petscstack) { petscstack->hotdepth
+= (PETSC_FALSE || petscstack->hotdepth); } ; } while (0)
; ; } while (0);

1651

ierr = PetscObjectGetComm((PetscObject)pc, &comm);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1651,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1652

ierr = MPI_Comm_size(comm, &size);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1652,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1653

ierr = MPI_Comm_rank(comm, &rank);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1653,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1654

ierr = MatGetOwnershipRange(pc->pmat, &first, &last);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1654,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1655

if (first%dof || last%dof) SETERRQ3(PETSC_COMM_SELF, PETSC_ERR_ARG_OUTOFRANGE, "Matrix row partitioning unsuitable for domain decomposition: local row range (%D,%D) "return PetscError(((MPI_Comm)0x44000001),1656,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,63,PETSC_ERROR_INITIAL,"Matrix row partitioning unsuitable for domain decomposition: local row range (%D,%D) "
"does not respect the number of degrees of freedom per grid point %D"
,first,last,dof)

1656

"does not respect the number of degrees of freedom per grid point %D", first, last, dof)return PetscError(((MPI_Comm)0x44000001),1656,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,63,PETSC_ERROR_INITIAL,"Matrix row partitioning unsuitable for domain decomposition: local row range (%D,%D) "
"does not respect the number of degrees of freedom per grid point %D"
,first,last,dof);

1657

1658

/* Determine the number of domains with nonzero intersections with the local ownership range. */

1659

s = 0;

1660

ystart = 0;

1661

for (j=0; j<Ndomains; ++j) {

1662

maxheight = N/Ndomains + ((N % Ndomains) > j); /* Maximal height of subdomain */

1663

if (maxheight < 2) SETERRQ2(PETSC_COMM_SELF,PETSC_ERR_ARG_OUTOFRANGE,"Too many %D subdomains in the vertical directon for mesh height %D", Ndomains, N)return PetscError(((MPI_Comm)0x44000001),1663,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,63,PETSC_ERROR_INITIAL,"Too many %D subdomains in the vertical directon for mesh height %D"
,Ndomains,N);

1664

/* Vertical domain limits with an overlap. */

1665

ylow = PetscMax(ystart - overlap,0)(((ystart - overlap)<(0)) ? (0) : (ystart - overlap));

1666

yhigh = PetscMin(ystart + maxheight + overlap,N)(((ystart + maxheight + overlap)<(N)) ? (ystart + maxheight
+ overlap) : (N));

1667

xstart = 0;

1668

for (i=0; i<Mdomains; ++i) {

1669

maxwidth = M/Mdomains + ((M % Mdomains) > i); /* Maximal width of subdomain */

1670

if (maxwidth < 2) SETERRQ2(PETSC_COMM_SELF,PETSC_ERR_ARG_OUTOFRANGE,"Too many %D subdomains in the horizontal direction for mesh width %D", Mdomains, M)return PetscError(((MPI_Comm)0x44000001),1670,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,63,PETSC_ERROR_INITIAL,"Too many %D subdomains in the horizontal direction for mesh width %D"
,Mdomains,M);

1671

/* Horizontal domain limits with an overlap. */

1672

xleft = PetscMax(xstart - overlap,0)(((xstart - overlap)<(0)) ? (0) : (xstart - overlap));

1673

xright = PetscMin(xstart + maxwidth + overlap,M)(((xstart + maxwidth + overlap)<(M)) ? (xstart + maxwidth +
overlap) : (M));

1674

1675

Determine whether this subdomain intersects this processor's ownership range of pc->pmat.

1676

1677

PCGASMLocalSubdomainBounds2D(M,N,xleft,ylow,xright,yhigh,first,last,(&xleft_loc),(&ylow_loc),(&xright_loc),(&yhigh_loc),(&nidx)){ PetscInt first_row = first/M, last_row = last/M+1; *(&ylow_loc
) = (((first_row)<(ylow)) ? (ylow) : (first_row)); *(&
xleft_loc) = *(&ylow_loc)==first_row ? (((first%M)<(xleft
)) ? (xleft) : (first%M)) : xleft; *(&yhigh_loc) = (((last_row
)<(yhigh)) ? (last_row) : (yhigh)); *(&xright_loc) = *
(&yhigh_loc)==last_row ? (((xright)<(last%M)) ? (xright
) : (last%M)) : xright; *(&nidx) = 0; if (*(&ylow_loc
) < *(&yhigh_loc)) { PetscInt width = xright-xleft; *(
&nidx) += width*(*(&yhigh_loc)-*(&ylow_loc)-1); *
(&nidx) += ((((((*(&xright_loc)-xleft)<(0)) ? (0) :
(*(&xright_loc)-xleft)))<(width)) ? ((((*(&xright_loc
)-xleft)<(0)) ? (0) : (*(&xright_loc)-xleft))) : (width
)); *(&nidx) -= ((((((*(&xleft_loc)-xleft)<(0)) ? (
0) : (*(&xleft_loc)-xleft)))<(width)) ? ((((*(&xleft_loc
)-xleft)<(0)) ? (0) : (*(&xleft_loc)-xleft))) : (width
)); } };

1678

if (nidx) ++s;

1679

xstart += maxwidth;

1680

} /* for (i = 0; i < Mdomains; ++i) */

1681

ystart += maxheight;

1682

} /* for (j = 0; j < Ndomains; ++j) */

1683

1684

/* Now we can allocate the necessary number of ISs. */

1685

*nsub = s;

1686

ierr = PetscMalloc1(*nsub,is)PetscMallocA(1,PETSC_FALSE,1686,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,(size_t)(*nsub)*sizeof(**(is)),(is));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1686,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1687

ierr = PetscMalloc1(*nsub,is_local)PetscMallocA(1,PETSC_FALSE,1687,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,(size_t)(*nsub)*sizeof(**(is_local)),(is_local));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1687,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1688

s = 0;

1689

ystart = 0;

1690

for (j=0; j<Ndomains; ++j) {

1691

maxheight = N/Ndomains + ((N % Ndomains) > j); /* Maximal height of subdomain */

1692

if (maxheight < 2) SETERRQ2(PETSC_COMM_SELF,PETSC_ERR_ARG_OUTOFRANGE,"Too many %D subdomains in the vertical directon for mesh height %D", Ndomains, N)return PetscError(((MPI_Comm)0x44000001),1692,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,63,PETSC_ERROR_INITIAL,"Too many %D subdomains in the vertical directon for mesh height %D"
,Ndomains,N);

1693

/* Vertical domain limits with an overlap. */

1694

y[0][0] = PetscMax(ystart - overlap,0)(((ystart - overlap)<(0)) ? (0) : (ystart - overlap));

1695

y[0][1] = PetscMin(ystart + maxheight + overlap,N)(((ystart + maxheight + overlap)<(N)) ? (ystart + maxheight
+ overlap) : (N));

1696

/* Vertical domain limits without an overlap. */

1697

y[1][0] = ystart;

1698

y[1][1] = PetscMin(ystart + maxheight,N)(((ystart + maxheight)<(N)) ? (ystart + maxheight) : (N));

1699

xstart = 0;

1700

for (i=0; i<Mdomains; ++i) {

1701

maxwidth = M/Mdomains + ((M % Mdomains) > i); /* Maximal width of subdomain */

1702

if (maxwidth < 2) SETERRQ2(PETSC_COMM_SELF,PETSC_ERR_ARG_OUTOFRANGE,"Too many %D subdomains in the horizontal direction for mesh width %D", Mdomains, M)return PetscError(((MPI_Comm)0x44000001),1702,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,63,PETSC_ERROR_INITIAL,"Too many %D subdomains in the horizontal direction for mesh width %D"
,Mdomains,M);

1703

/* Horizontal domain limits with an overlap. */

1704

x[0][0] = PetscMax(xstart - overlap,0)(((xstart - overlap)<(0)) ? (0) : (xstart - overlap));

1705

x[0][1] = PetscMin(xstart + maxwidth + overlap,M)(((xstart + maxwidth + overlap)<(M)) ? (xstart + maxwidth +
overlap) : (M));

1706

/* Horizontal domain limits without an overlap. */

1707

x[1][0] = xstart;

1708

x[1][1] = PetscMin(xstart+maxwidth,M)(((xstart+maxwidth)<(M)) ? (xstart+maxwidth) : (M));

1709

1710

Determine whether this domain intersects this processor's ownership range of pc->pmat.

1711

Do this twice: first for the domains with overlaps, and once without.

1712

During the first pass create the subcommunicators, and use them on the second pass as well.

1713

1714

for (q = 0; q < 2; ++q) {

1715

PetscBool split = PETSC_FALSE;

1716

1717

domain limits, (xleft, xright) and (ylow, yheigh) are adjusted

1718

according to whether the domain with an overlap or without is considered.

1719

1720

xleft = x[q][0]; xright = x[q][1];

1721

ylow = y[q][0]; yhigh = y[q][1];

1722

1723

nidx *= dof;

1724

n[q] = nidx;

1725

1726

Based on the counted number of indices in the local domain *with an overlap*,

1727

construct a subcommunicator of all the processors supporting this domain.

1728

Observe that a domain with an overlap might have nontrivial local support,

1729

while the domain without an overlap might not. Hence, the decision to participate

1730

in the subcommunicator must be based on the domain with an overlap.

1731

1732

if (q == 0) {

1733

if (nidx) color = 1;

1734

else color = MPI_UNDEFINED(-32766);

1735

ierr = MPI_Comm_split(comm, color, rank, &subcomm);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1735,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1736

split = PETSC_TRUE;

1737

}

1738

1739

Proceed only if the number of local indices *with an overlap* is nonzero.

1740

1741

if (n[0]) {

1742

if (q == 0) xis = is;

1743

if (q == 1) {

1744

1745

The IS for the no-overlap subdomain shares a communicator with the overlapping domain.

1746

Moreover, if the overlap is zero, the two ISs are identical.

1747

1748

if (overlap == 0) {

1749

(*is_local)[s] = (*is)[s];

1750

ierr = PetscObjectReference((PetscObject)(*is)[s]);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1750,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1751

continue;

1752

} else {

1753

xis = is_local;

1754

subcomm = ((PetscObject)(*is)[s])->comm;

1755

}

1756

} /* if (q == 1) */

1757

idx = NULL((void*)0);

1758

ierr = PetscMalloc1(nidx,&idx)PetscMallocA(1,PETSC_FALSE,1758,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,(size_t)(nidx)*sizeof(**(&idx)),(&idx));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1758,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1759

if (nidx) {

1760

k = 0;

1761

for (jj=ylow_loc; jj<yhigh_loc; ++jj) {

1762

PetscInt x0 = (jj==ylow_loc) ? xleft_loc : xleft;

1763

PetscInt x1 = (jj==yhigh_loc-1) ? xright_loc : xright;

1764

kk = dof*(M*jj + x0);

1765

for (ii=x0; ii<x1; ++ii) {

1766

for (d = 0; d < dof; ++d) {

1767

idx[k++] = kk++;

1768

}

1769

}

1770

}

1771

}

1772

ierr = ISCreateGeneral(subcomm,nidx,idx,PETSC_OWN_POINTER,(*xis)+s);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1772,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1773

if (split) {

1774

ierr = MPI_Comm_free(&subcomm);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1774,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1775

}

1776

}/* if (n[0]) */

1777

}/* for (q = 0; q < 2; ++q) */

1778

if (n[0]) ++s;

1779

xstart += maxwidth;

1780

} /* for (i = 0; i < Mdomains; ++i) */

1781

ystart += maxheight;

1782

} /* for (j = 0; j < Ndomains; ++j) */

1783

1784

}

1785

1786

/*@C

1787

PCGASMGetSubdomains - Gets the subdomains supported on this processor

1788

for the additive Schwarz preconditioner.

1789

1790

Not Collective

1791

1792

Input Parameter:

1793

. pc - the preconditioner context

1794

1795

Output Parameters:

1796

+ n - the number of subdomains for this processor (default value = 1)

1797

. iis - the index sets that define the inner subdomains (without overlap) supported on this processor (can be NULL)

1798

- ois - the index sets that define the outer subdomains (with overlap) supported on this processor (can be NULL)

1799

1800

1801

Notes:

1802

The user is responsible for destroying the ISs and freeing the returned arrays.

1803

The IS numbering is in the parallel, global numbering of the vector.

1804

1805

Level: advanced

1806

1807

.seealso: PCGASMSetOverlap(), PCGASMGetSubKSP(), PCGASMCreateSubdomains2D(),

1808

PCGASMSetSubdomains(), PCGASMGetSubmatrices()

1809

@*/

1810

PetscErrorCode PCGASMGetSubdomains(PC pc,PetscInt *n,IS *iis[],IS *ois[])

1811

{

1812

PC_GASM *osm;

1813

PetscErrorCode ierr;

1814

PetscBool match;

1815

PetscInt i;

1816

1817

PetscFunctionBegindo { do { ; if (petscstack && (petscstack->currentsize
< 64)) { petscstack->function[petscstack->currentsize
] = __func__; petscstack->file[petscstack->currentsize]
= "/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
; petscstack->line[petscstack->currentsize] = 1817; petscstack
->petscroutine[petscstack->currentsize] = PETSC_TRUE; petscstack
->currentsize++; } if (petscstack) { petscstack->hotdepth
+= (PETSC_FALSE || petscstack->hotdepth); } ; } while (0)
; ; } while (0);

1818

PetscValidHeaderSpecific(pc,PC_CLASSID,1)do { if (!pc) return PetscError(((MPI_Comm)0x44000001),1818,__func__
,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c",85
,PETSC_ERROR_INITIAL,"Null Object: Parameter # %d",1); if (!PetscCheckPointer
(pc,PETSC_OBJECT)) return PetscError(((MPI_Comm)0x44000001),1818
,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,64,PETSC_ERROR_INITIAL,"Invalid Pointer to Object: Parameter # %d"
,1); if (((PetscObject)(pc))->classid != PC_CLASSID) { if (
((PetscObject)(pc))->classid == -1) return PetscError(((MPI_Comm
)0x44000001),1818,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,64,PETSC_ERROR_INITIAL,"Object already free: Parameter # %d"
,1); else return PetscError(((MPI_Comm)0x44000001),1818,__func__
,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c",62
,PETSC_ERROR_INITIAL,"Wrong type of object: Parameter # %d",1
); } } while (0);

1819

ierr = PetscObjectTypeCompare((PetscObject)pc,PCGASM"gasm",&match);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1819,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1820

if (!match) SETERRQ2(PetscObjectComm((PetscObject)pc), PETSC_ERR_ARG_WRONG, "Incorrect object type: expected %s, got %s instead", PCGASM, ((PetscObject)pc)->type_name)return PetscError(PetscObjectComm((PetscObject)pc),1820,__func__
,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c",62
,PETSC_ERROR_INITIAL,"Incorrect object type: expected %s, got %s instead"
,"gasm",((PetscObject)pc)->type_name);

1821

osm = (PC_GASM*)pc->data;

1822

if (n) *n = osm->n;

1823

if (iis) {

1824

ierr = PetscMalloc1(osm->n, iis)PetscMallocA(1,PETSC_FALSE,1824,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,(size_t)(osm->n)*sizeof(**(iis)),(iis));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1824,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1825

}

1826

if (ois) {

1827

ierr = PetscMalloc1(osm->n, ois)PetscMallocA(1,PETSC_FALSE,1827,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,(size_t)(osm->n)*sizeof(**(ois)),(ois));CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1827,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1828

}

1829

if (iis || ois) {

1830

for (i = 0; i < osm->n; ++i) {

1831

if (iis) (*iis)[i] = osm->iis[i];

1832

if (ois) (*ois)[i] = osm->ois[i];

1833

}

1834

}

1835

1836

}

1837

1838

/*@C

1839

PCGASMGetSubmatrices - Gets the local submatrices (for this processor

1840

only) for the additive Schwarz preconditioner.

1841

1842

Not Collective

1843

1844

Input Parameter:

1845

. pc - the preconditioner context

1846

1847

Output Parameters:

1848

+ n - the number of matrices for this processor (default value = 1)

1849

- mat - the matrices

1850

1851

Notes:

1852

matrices returned by this routine have the same communicators as the index sets (IS)

1853

used to define subdomains in PCGASMSetSubdomains()

1854

Level: advanced

1855

1856

.seealso: PCGASMSetOverlap(), PCGASMGetSubKSP(),

1857

PCGASMCreateSubdomains2D(), PCGASMSetSubdomains(), PCGASMGetSubdomains()

1858

@*/

1859

PetscErrorCode PCGASMGetSubmatrices(PC pc,PetscInt *n,Mat *mat[])

1860

{

1861

PC_GASM *osm;

1862

PetscErrorCode ierr;

1863

PetscBool match;

1864

1865

PetscFunctionBegindo { do { ; if (petscstack && (petscstack->currentsize
< 64)) { petscstack->function[petscstack->currentsize
] = __func__; petscstack->file[petscstack->currentsize]
= "/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
; petscstack->line[petscstack->currentsize] = 1865; petscstack
->petscroutine[petscstack->currentsize] = PETSC_TRUE; petscstack
->currentsize++; } if (petscstack) { petscstack->hotdepth
+= (PETSC_FALSE || petscstack->hotdepth); } ; } while (0)
; ; } while (0);

1866

PetscValidHeaderSpecific(pc,PC_CLASSID,1)do { if (!pc) return PetscError(((MPI_Comm)0x44000001),1866,__func__
,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c",85
,PETSC_ERROR_INITIAL,"Null Object: Parameter # %d",1); if (!PetscCheckPointer
(pc,PETSC_OBJECT)) return PetscError(((MPI_Comm)0x44000001),1866
,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,64,PETSC_ERROR_INITIAL,"Invalid Pointer to Object: Parameter # %d"
,1); if (((PetscObject)(pc))->classid != PC_CLASSID) { if (
((PetscObject)(pc))->classid == -1) return PetscError(((MPI_Comm
)0x44000001),1866,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,64,PETSC_ERROR_INITIAL,"Object already free: Parameter # %d"
,1); else return PetscError(((MPI_Comm)0x44000001),1866,__func__
,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c",62
,PETSC_ERROR_INITIAL,"Wrong type of object: Parameter # %d",1
); } } while (0);

1867

PetscValidIntPointer(n,2)do { if (!n) return PetscError(((MPI_Comm)0x44000001),1867,__func__
,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c",68
,PETSC_ERROR_INITIAL,"Null Pointer: Parameter # %d",2); if (!
PetscCheckPointer(n,PETSC_INT)) return PetscError(((MPI_Comm)
0x44000001),1867,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,68,PETSC_ERROR_INITIAL,"Invalid Pointer to Int: Parameter # %d"
,2); } while (0);

1868

if (mat) PetscValidPointer(mat,3)do { if (!mat) return PetscError(((MPI_Comm)0x44000001),1868,
__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,85,PETSC_ERROR_INITIAL,"Null Pointer: Parameter # %d",3); if
(!PetscCheckPointer(mat,PETSC_CHAR)) return PetscError(((MPI_Comm
)0x44000001),1868,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,68,PETSC_ERROR_INITIAL,"Invalid Pointer: Parameter # %d",3);
} while (0);

1869

if (!pc->setupcalled) SETERRQ(PetscObjectComm((PetscObject)pc),PETSC_ERR_ARG_WRONGSTATE,"Must call after KSPSetUP() or PCSetUp().")return PetscError(PetscObjectComm((PetscObject)pc),1869,__func__
,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c",73
,PETSC_ERROR_INITIAL,"Must call after KSPSetUP() or PCSetUp()."
);

1870

ierr = PetscObjectTypeCompare((PetscObject)pc,PCGASM"gasm",&match);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1870,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1871

if (!match) SETERRQ2(PetscObjectComm((PetscObject)pc), PETSC_ERR_ARG_WRONG, "Expected %s, got %s instead", PCGASM, ((PetscObject)pc)->type_name)return PetscError(PetscObjectComm((PetscObject)pc),1871,__func__
,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c",62
,PETSC_ERROR_INITIAL,"Expected %s, got %s instead","gasm",((PetscObject
)pc)->type_name);

1872

osm = (PC_GASM*)pc->data;

1873

if (n) *n = osm->n;

1874

if (mat) *mat = osm->pmat;

1875

1876

}

1877

1878

/*@

1879

PCGASMSetUseDMSubdomains - Indicates whether to use DMCreateDomainDecomposition() to define the subdomains, whenever possible.

1880

Logically Collective

1881

1882

Input Parameter:

1883

+ pc - the preconditioner

1884

- flg - boolean indicating whether to use subdomains defined by the DM

1885

1886

Options Database Key:

1887

. -pc_gasm_dm_subdomains -pc_gasm_overlap -pc_gasm_total_subdomains

1888

1889

Level: intermediate

1890

1891

Notes:

1892

PCGASMSetSubdomains(), PCGASMSetTotalSubdomains() or PCGASMSetOverlap() take precedence over PCGASMSetUseDMSubdomains(),

1893

so setting PCGASMSetSubdomains() with nontrivial subdomain ISs or any of PCGASMSetTotalSubdomains() and PCGASMSetOverlap()

1894

automatically turns the latter off.

1895

1896

.seealso: PCGASMGetUseDMSubdomains(), PCGASMSetSubdomains(), PCGASMSetOverlap()

1897

PCGASMCreateSubdomains2D()

1898

@*/

1899

PetscErrorCode PCGASMSetUseDMSubdomains(PC pc,PetscBool flg)

1900

{

1901

PC_GASM *osm = (PC_GASM*)pc->data;

1902

PetscErrorCode ierr;

1903

PetscBool match;

1904

1905

PetscFunctionBegindo { do { ; if (petscstack && (petscstack->currentsize
< 64)) { petscstack->function[petscstack->currentsize
] = __func__; petscstack->file[petscstack->currentsize]
= "/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
; petscstack->line[petscstack->currentsize] = 1905; petscstack
->petscroutine[petscstack->currentsize] = PETSC_TRUE; petscstack
->currentsize++; } if (petscstack) { petscstack->hotdepth
+= (PETSC_FALSE || petscstack->hotdepth); } ; } while (0)
; ; } while (0);

1906

PetscValidHeaderSpecific(pc,PC_CLASSID,1)do { if (!pc) return PetscError(((MPI_Comm)0x44000001),1906,__func__
,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c",85
,PETSC_ERROR_INITIAL,"Null Object: Parameter # %d",1); if (!PetscCheckPointer
(pc,PETSC_OBJECT)) return PetscError(((MPI_Comm)0x44000001),1906
,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,64,PETSC_ERROR_INITIAL,"Invalid Pointer to Object: Parameter # %d"
,1); if (((PetscObject)(pc))->classid != PC_CLASSID) { if (
((PetscObject)(pc))->classid == -1) return PetscError(((MPI_Comm
)0x44000001),1906,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,64,PETSC_ERROR_INITIAL,"Object already free: Parameter # %d"
,1); else return PetscError(((MPI_Comm)0x44000001),1906,__func__
,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c",62
,PETSC_ERROR_INITIAL,"Wrong type of object: Parameter # %d",1
); } } while (0);

1907

PetscValidLogicalCollectiveBool(pc,flg,2)do { PetscErrorCode _7_ierr; PetscMPIInt b1[2],b2[2]; b1[0] =
-(PetscMPIInt)flg; b1[1] = (PetscMPIInt)flg; _7_ierr = (PetscAllreduceBarrierCheck
(PetscObjectComm((PetscObject)pc),2,1907,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
) || ((petsc_allreduce_ct += PetscMPIParallelComm((PetscObjectComm
((PetscObject)pc))),0) || MPI_Allreduce((b1),(b2),(2),(((MPI_Datatype
)0x4c000405)),((MPI_Op)(0x58000001)),(PetscObjectComm((PetscObject
)pc)))));do {if (__builtin_expect(!!(_7_ierr),0)) return PetscError
(((MPI_Comm)0x44000001),1907,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,_7_ierr,PETSC_ERROR_REPEAT," ");} while (0); if (-b2[0] != b2
[1]) return PetscError(PetscObjectComm((PetscObject)pc),1907,
__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,62,PETSC_ERROR_INITIAL,"Bool value must be same on all processes, argument # %d"
,2); } while (0);

1908

if (pc->setupcalled) SETERRQ(((PetscObject)pc)->comm,PETSC_ERR_ARG_WRONGSTATE,"Not for a setup PC.")return PetscError(((PetscObject)pc)->comm,1908,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,73,PETSC_ERROR_INITIAL,"Not for a setup PC.");

1909

ierr = PetscObjectTypeCompare((PetscObject)pc,PCGASM"gasm",&match);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1909,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1910

if (match) {

1911

if (!osm->user_subdomains && osm->N == PETSC_DETERMINE-1 && osm->overlap < 0) {

1912

osm->dm_subdomains = flg;

1913

}

1914

}

1915

1916

}

1917

1918

/*@

1919

PCGASMGetUseDMSubdomains - Returns flag indicating whether to use DMCreateDomainDecomposition() to define the subdomains, whenever possible.

1920

Not Collective

1921

1922

Input Parameter:

1923

. pc - the preconditioner

1924

1925

Output Parameter:

1926

. flg - boolean indicating whether to use subdomains defined by the DM

1927

1928

Level: intermediate

1929

1930

.seealso: PCGASMSetUseDMSubdomains(), PCGASMSetOverlap()

1931

PCGASMCreateSubdomains2D()

1932

@*/

1933

PetscErrorCode PCGASMGetUseDMSubdomains(PC pc,PetscBool* flg)

1934

{

1935

PC_GASM *osm = (PC_GASM*)pc->data;

1936

PetscErrorCode ierr;

1937

PetscBool match;

1938

1939

PetscFunctionBegindo { do { ; if (petscstack && (petscstack->currentsize
< 64)) { petscstack->function[petscstack->currentsize
] = __func__; petscstack->file[petscstack->currentsize]
= "/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
; petscstack->line[petscstack->currentsize] = 1939; petscstack
->petscroutine[petscstack->currentsize] = PETSC_TRUE; petscstack
->currentsize++; } if (petscstack) { petscstack->hotdepth
+= (PETSC_FALSE || petscstack->hotdepth); } ; } while (0)
; ; } while (0);

1940

PetscValidHeaderSpecific(pc,PC_CLASSID,1)do { if (!pc) return PetscError(((MPI_Comm)0x44000001),1940,__func__
,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c",85
,PETSC_ERROR_INITIAL,"Null Object: Parameter # %d",1); if (!PetscCheckPointer
(pc,PETSC_OBJECT)) return PetscError(((MPI_Comm)0x44000001),1940
,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,64,PETSC_ERROR_INITIAL,"Invalid Pointer to Object: Parameter # %d"
,1); if (((PetscObject)(pc))->classid != PC_CLASSID) { if (
((PetscObject)(pc))->classid == -1) return PetscError(((MPI_Comm
)0x44000001),1940,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,64,PETSC_ERROR_INITIAL,"Object already free: Parameter # %d"
,1); else return PetscError(((MPI_Comm)0x44000001),1940,__func__
,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c",62
,PETSC_ERROR_INITIAL,"Wrong type of object: Parameter # %d",1
); } } while (0);

1941

PetscValidPointer(flg,2)do { if (!flg) return PetscError(((MPI_Comm)0x44000001),1941,
__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,85,PETSC_ERROR_INITIAL,"Null Pointer: Parameter # %d",2); if
(!PetscCheckPointer(flg,PETSC_CHAR)) return PetscError(((MPI_Comm
)0x44000001),1941,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,68,PETSC_ERROR_INITIAL,"Invalid Pointer: Parameter # %d",2);
} while (0);

1942

ierr = PetscObjectTypeCompare((PetscObject)pc,PCGASM"gasm",&match);CHKERRQ(ierr)do {if (__builtin_expect(!!(ierr),0)) return PetscError(((MPI_Comm
)0x44000001),1942,__func__,"/sandbox/petsc/petsc.master/src/ksp/pc/impls/gasm/gasm.c"
,ierr,PETSC_ERROR_REPEAT," ");} while (0);

1943

if (match) {

1944

if (flg) *flg = osm->dm_subdomains;

1945

}

1946

1947

}