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/*
* Copyright (C) by Argonne National Laboratory
* See COPYRIGHT in top-level directory
*/
#include "mpi.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "mpitest.h"
#define IF_VERBOSE(a) if (verbose) { printf a ; fflush(stdout); }
/* This test checks to make sure that two MPI_Comm_connects to two different MPI
* ports match their corresponding MPI_Comm_accepts. The root process opens two
* MPI ports and sends the first port to process 1 and the second to process 2.
* Then the root process accepts a connection from the second port followed by
* the first port. Processes 1 and 2 both connect back to the root but process
* 2 first sleeps for three seconds to give process 1 time to attempt to connect
* to the root. The root should wait until process 2 connects before accepting
* the connection from process 1.
*/
int main(int argc, char *argv[])
{
int num_errors = 0, total_num_errors = 0;
int rank, size;
char port1[MPI_MAX_PORT_NAME];
char port2[MPI_MAX_PORT_NAME];
MPI_Status status;
MPI_Comm comm1, comm2;
int verbose = 0;
int data = 0;
MTEST_VG_MEM_INIT(port1, MPI_MAX_PORT_NAME * sizeof(char));
MTEST_VG_MEM_INIT(port2, MPI_MAX_PORT_NAME * sizeof(char));
if (getenv("MPITEST_VERBOSE")) {
verbose = 1;
}
MPI_Init(&argc, &argv);
MPI_Comm_size(MPI_COMM_WORLD, &size);
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
if (size < 3) {
printf("Three processes needed to run this test.\n");
MPI_Finalize();
return 1;
}
if (rank == 0) {
IF_VERBOSE(("0: opening ports.\n"));
MPI_Open_port(MPI_INFO_NULL, port1);
MPI_Open_port(MPI_INFO_NULL, port2);
IF_VERBOSE(("0: opened port1: <%s>\n", port1));
IF_VERBOSE(("0: opened port2: <%s>\n", port2));
IF_VERBOSE(("0: sending ports.\n"));
MPI_Send(port1, MPI_MAX_PORT_NAME, MPI_CHAR, 1, 0, MPI_COMM_WORLD);
MPI_Send(port2, MPI_MAX_PORT_NAME, MPI_CHAR, 2, 0, MPI_COMM_WORLD);
IF_VERBOSE(("0: accepting port2.\n"));
MPI_Comm_accept(port2, MPI_INFO_NULL, 0, MPI_COMM_SELF, &comm2);
IF_VERBOSE(("0: accepting port1.\n"));
MPI_Comm_accept(port1, MPI_INFO_NULL, 0, MPI_COMM_SELF, &comm1);
IF_VERBOSE(("0: closing ports.\n"));
MPI_Close_port(port1);
MPI_Close_port(port2);
IF_VERBOSE(("0: sending 1 to process 1.\n"));
data = 1;
MPI_Send(&data, 1, MPI_INT, 0, 0, comm1);
IF_VERBOSE(("0: sending 2 to process 2.\n"));
data = 2;
MPI_Send(&data, 1, MPI_INT, 0, 0, comm2);
IF_VERBOSE(("0: disconnecting.\n"));
MPI_Comm_disconnect(&comm1);
MPI_Comm_disconnect(&comm2);
} else if (rank == 1) {
IF_VERBOSE(("1: receiving port.\n"));
MPI_Recv(port1, MPI_MAX_PORT_NAME, MPI_CHAR, 0, 0, MPI_COMM_WORLD, &status);
IF_VERBOSE(("1: received port1: <%s>\n", port1));
IF_VERBOSE(("1: connecting.\n"));
MPI_Comm_connect(port1, MPI_INFO_NULL, 0, MPI_COMM_SELF, &comm1);
MPI_Recv(&data, 1, MPI_INT, 0, 0, comm1, &status);
if (data != 1) {
printf("Received %d from root when expecting 1\n", data);
fflush(stdout);
num_errors++;
}
IF_VERBOSE(("1: disconnecting.\n"));
MPI_Comm_disconnect(&comm1);
} else if (rank == 2) {
IF_VERBOSE(("2: receiving port.\n"));
MPI_Recv(port2, MPI_MAX_PORT_NAME, MPI_CHAR, 0, 0, MPI_COMM_WORLD, &status);
IF_VERBOSE(("2: received port2: <%s>\n", port2));
/* make sure process 1 has time to do the connect before this process
* attempts to connect */
MTestSleep(3);
IF_VERBOSE(("2: connecting.\n"));
MPI_Comm_connect(port2, MPI_INFO_NULL, 0, MPI_COMM_SELF, &comm2);
MPI_Recv(&data, 1, MPI_INT, 0, 0, comm2, &status);
if (data != 2) {
printf("Received %d from root when expecting 2\n", data);
fflush(stdout);
num_errors++;
}
IF_VERBOSE(("2: disconnecting.\n"));
MPI_Comm_disconnect(&comm2);
}
MPI_Barrier(MPI_COMM_WORLD);
MPI_Reduce(&num_errors, &total_num_errors, 1, MPI_INT, MPI_SUM, 0, MPI_COMM_WORLD);
if (rank == 0) {
if (total_num_errors) {
printf(" Found %d errors\n", total_num_errors);
} else {
printf(" No Errors\n");
}
fflush(stdout);
}
MPI_Finalize();
return MTestReturnValue(total_num_errors);
}
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