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/*
* Copyright (C) by Argonne National Laboratory
* See COPYRIGHT in top-level directory
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "mpi.h"
#include "mpitest.h"
/*
* Run this test with 8 processes. This test was submitted by xxx
* as a result of problems seen with the ch3:shm device on a Solaris
* system. The symptom is that the test hangs; this is due to losing
* a message, probably due to a race condition in a message-queue update.
* As a test for race conditions, it may need to be run multiple times
* to expose a problem if a problem does exist.
*/
#define LOOP_COUNT 100000
#define DATA_SIZE 4
#define MP_TAG 999
#define PROGRESS_COUNT 0xfff
static int verbose = 0;
static int loopProgress = 0;
int main(int argc, char *argv[])
{
int nProc, rank;
int i, j, status;
FILE *pf = 0;
MTest_Init(&argc, &argv);
MPI_Comm_size(MPI_COMM_WORLD, &nProc);
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
for (i = 1; i < argc; i++) {
if (strcmp(argv[i], "-v") == 0 || strcmp(argv[i], "--verbose") == 0)
verbose = 1;
else if (strcmp(argv[i], "-p") == 0 || strcmp(argv[i], "--progress") == 0)
loopProgress = 1;
else {
if (rank == 0) {
fprintf(stderr, "%s: [ -v | --verbose ] [ -p | --progress ]\n", argv[0]);
fflush(stderr);
}
}
}
if (verbose) {
char buf[128];
sprintf(buf, "fast_mpi_%d.dmp", rank);
pf = fopen(buf, "w");
} else if (loopProgress) {
pf = stdout;
}
if (!rank) {
int **psend;
int **precv;
psend = (int **) calloc(nProc, sizeof(int *));
precv = (int **) calloc(nProc, sizeof(int *));
for (i = 0; i < nProc; i++) {
psend[i] = (int *) calloc(DATA_SIZE, sizeof(int));
precv[i] = (int *) calloc(DATA_SIZE, sizeof(int));
}
for (i = 0; i < LOOP_COUNT; i++) {
if (verbose) {
fprintf(pf, "Main : loop %d\n", i);
fflush(pf);
} else if (loopProgress && (i & PROGRESS_COUNT) == 0) {
fprintf(pf, "Main: loop %d\n", i);
fflush(pf);
}
for (j = 1; j < nProc; j++) {
if (verbose) {
fprintf(pf, " read from child %d\n", j);
fflush(pf);
}
status = MPI_Recv(precv[j], DATA_SIZE, MPI_INT, j, MP_TAG,
MPI_COMM_WORLD, MPI_STATUS_IGNORE);
if (verbose) {
fprintf(pf, " read from child %d done, status = %d\n", j, status);
fflush(pf);
}
}
for (j = 1; j < nProc; j++) {
if (verbose) {
fprintf(pf, " send to child %d\n", j);
fflush(pf);
}
status = MPI_Send(psend[j], DATA_SIZE - 1, MPI_INT, j, MP_TAG, MPI_COMM_WORLD);
if (verbose) {
fprintf(pf, " send to child %d done, status = %d\n", j, status);
fflush(pf);
}
}
}
for (i = 0; i < nProc; i++) {
free(psend[i]);
free(precv[i]);
}
free(psend);
free(precv);
} else {
int *psend;
int *precv;
psend = (int *) calloc(DATA_SIZE, sizeof(int));
precv = (int *) calloc(DATA_SIZE, sizeof(int));
for (i = 0; i < LOOP_COUNT; i++) {
if (verbose) {
fprintf(pf, " send to main\n");
fflush(pf);
}
/*
* else if (loopProgress && (i & PROGRESS_COUNT) == 0) {
* fprintf(pf, "Slave: loop %d\n", i); fflush(pf);
* }
*/
status = MPI_Send(psend, DATA_SIZE - 1, MPI_INT, 0, MP_TAG, MPI_COMM_WORLD);
if (verbose) {
fprintf(pf, " send to main done, status = %d\n", status);
fflush(pf);
fprintf(pf, " read from main\n");
fflush(pf);
}
status = MPI_Recv(precv, DATA_SIZE, MPI_INT, 0, MP_TAG,
MPI_COMM_WORLD, MPI_STATUS_IGNORE);
if (verbose) {
fprintf(pf, " read from main done, status = %d\n", status);
fflush(pf);
}
}
free(psend);
free(precv);
}
if (verbose) {
fclose(pf);
}
MTest_Finalize(0);
return 0;
}
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