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/*
* Copyright (C) by Argonne National Laboratory
* See COPYRIGHT in top-level directory
*/
#include <stdio.h>
#include <stdlib.h>
#include "mpi.h"
#include "mpitest.h"
/*
* Test handling of truncated messages, including short and rendezvous
*/
static int testShort = 1;
static int ShortLen = 2;
static int testMid = 1;
static int MidLen = 64;
static int testLong = 1;
static int LongLen = 100000;
int checkTruncError(int err, const char *msg);
int checkOk(int err, const char *msg);
int main(int argc, char *argv[])
{
MPI_Status status;
int err, errs = 0, source, dest, rank, size;
int *buf = 0;
MTest_Init(&argc, &argv);
MPI_Comm_set_errhandler(MPI_COMM_WORLD, MPI_ERRORS_RETURN);
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
MPI_Comm_size(MPI_COMM_WORLD, &size);
source = 0;
dest = size - 1;
buf = (int *) malloc(LongLen * sizeof(int));
MTEST_VG_MEM_INIT(buf, LongLen * sizeof(int));
if (!buf) {
fprintf(stderr, "Unable to allocate communication buffer of size %d\n", LongLen);
MPI_Abort(MPI_COMM_WORLD, 1);
}
if (testShort) {
if (rank == source) {
err = MPI_Send(buf, ShortLen, MPI_INT, dest, 0, MPI_COMM_WORLD);
errs += checkOk(err, "short");
} else if (rank == dest) {
err = MPI_Recv(buf, ShortLen - 1, MPI_INT, source, 0, MPI_COMM_WORLD, &status);
errs += checkTruncError(err, "short");
}
/* Try a message that is arrives after the receive is posted */
if (rank == source) {
MPI_Sendrecv(MPI_BOTTOM, 0, MPI_INT, dest, 1,
MPI_BOTTOM, 0, MPI_INT, dest, 1, MPI_COMM_WORLD, MPI_STATUS_IGNORE);
MPI_Send(buf, ShortLen, MPI_INT, dest, 2, MPI_COMM_WORLD);
} else if (rank == dest) {
MPI_Request req;
err = MPI_Irecv(buf, ShortLen - 1, MPI_INT, source, 2, MPI_COMM_WORLD, &req);
errs += checkOk(err, "irecv-short");
MPI_Sendrecv(MPI_BOTTOM, 0, MPI_INT, source, 1,
MPI_BOTTOM, 0, MPI_INT, source, 1, MPI_COMM_WORLD, MPI_STATUS_IGNORE);
err = MPI_Wait(&req, &status);
errs += checkTruncError(err, "irecv-short");
}
}
if (testMid) {
if (rank == source) {
err = MPI_Send(buf, MidLen, MPI_INT, dest, 0, MPI_COMM_WORLD);
errs += checkOk(err, "medium");
} else if (rank == dest) {
err = MPI_Recv(buf, MidLen - 1, MPI_INT, source, 0, MPI_COMM_WORLD, &status);
errs += checkTruncError(err, "medium");
}
}
if (testLong) {
if (rank == source) {
err = MPI_Send(buf, LongLen, MPI_INT, dest, 0, MPI_COMM_WORLD);
errs += checkOk(err, "long");
} else if (rank == dest) {
err = MPI_Recv(buf, LongLen - 1, MPI_INT, source, 0, MPI_COMM_WORLD, &status);
errs += checkTruncError(err, "long");
}
/* Test when the receive buffer is much shorter */
if (rank == source) {
err = MPI_Send(buf, LongLen, MPI_INT, dest, 0, MPI_COMM_WORLD);
errs += checkOk(err, "long");
} else if (rank == dest) {
err = MPI_Recv(buf, ShortLen, MPI_INT, source, 0, MPI_COMM_WORLD, &status);
errs += checkTruncError(err, "long-receive-short");
}
}
MPI_Barrier(MPI_COMM_WORLD);
free(buf);
MTest_Finalize(errs);
return MTestReturnValue(errs);
}
int checkTruncError(int err, const char *msg)
{
char errMsg[MPI_MAX_ERROR_STRING];
int errs = 0, msgLen, errclass;
if (!err) {
errs++;
fprintf(stderr, "MPI_Recv (%s) returned MPI_SUCCESS instead of truncated message\n", msg);
fflush(stderr);
} else {
MPI_Error_class(err, &errclass);
if (errclass != MPI_ERR_TRUNCATE) {
errs++;
MPI_Error_string(err, errMsg, &msgLen);
fprintf(stderr, "MPI_Recv (%s) returned unexpected error message: %s\n", msg, errMsg);
fflush(stderr);
}
}
return errs;
}
int checkOk(int err, const char *msg)
{
char errMsg[MPI_MAX_ERROR_STRING];
int errs = 0, msgLen;
if (err) {
errs++;
MPI_Error_string(err, errMsg, &msgLen);
fprintf(stderr, "MPI_Send(%s) failed with %s\n", msg, errMsg);
fflush(stderr);
}
return errs;
}
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