MPE_Seq_begin

Begins a sequential section of code.

Synopsis


#include <stdio.h>
#include "mpe.h"
void MPE_Seq_begin( comm, ng )
MPI_Comm comm;
int      ng;

Input Parameters

comm - Communicator to sequentialize.

ng - Number in group. This many processes are allowed to execute at the same time. Usually one.

Notes

MPE_Seq_begin and MPE_Seq_end provide a way to force a section of code to be executed by the processes in rank order. Typically, this is done with


  MPE_Seq_begin( comm, 1 );
  <code to be executed sequentially>
  MPE_Seq_end( comm, 1 );

Often, the sequential code contains output statements (e.g., printf) to be executed. Note that you may need to flush the I/O buffers before calling MPE_Seq_end; also note that some systems do not propagate I/O in any order to the controling terminal (in other words, even if you flush the output, you may not get the data in the order that you want).

Location:mpe_seq.c