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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"
/* Note: In this program, the return codes from the MPI routines are checked.
Since the error handlers for the communicators are not set to
MPI_ERRORS_RETURN, any error should cause an abort rather than a return.
The test on the return value is an extra safety check; note that a
return value of other than MPI_SUCCESS in these routines indicates an
error in the error handling by the MPI implementation */
#define IF_VERBOSE(a) if (verbose) { printf a ; fflush(stdout); }
void check_error(int, const char *);
void check_error(int error, const char *fcname)
{
char err_string[MPI_MAX_ERROR_STRING] = "";
int length;
if (error != MPI_SUCCESS) {
MPI_Error_string(error, err_string, &length);
printf("%s failed: %s\n", fcname, err_string);
fflush(stdout);
MPI_Abort(MPI_COMM_WORLD, error);
}
}
/* This test spawns two child jobs and has them open a port and connect to
* each other.
* The two children repeatedly connect, accept, and disconnect from each other.
*/
int main(int argc, char *argv[])
{
int error;
int rank, size;
int numprocs = 3;
char *argv1[2] = { (char *) "connector", NULL };
char *argv2[2] = { (char *) "acceptor", NULL };
MPI_Comm comm_connector, comm_acceptor, comm_parent, comm;
char port[MPI_MAX_PORT_NAME] = { 0 };
MPI_Status status;
MPI_Info spawn_path = MPI_INFO_NULL;
int i, num_loops = 100;
int data;
int verbose = 0;
int can_spawn, errs = 0;
if (getenv("MPITEST_VERBOSE")) {
verbose = 1;
}
IF_VERBOSE(("init.\n"));
error = MPI_Init(&argc, &argv);
check_error(error, "MPI_Init");
errs += MTestSpawnPossible(&can_spawn);
if (!can_spawn) {
if (errs)
printf(" Found %d errors\n", errs);
else
printf(" No Errors\n");
fflush(stdout);
} else {
IF_VERBOSE(("size.\n"));
error = MPI_Comm_size(MPI_COMM_WORLD, &size);
check_error(error, "MPI_Comm_size");
IF_VERBOSE(("rank.\n"));
error = MPI_Comm_rank(MPI_COMM_WORLD, &rank);
check_error(error, "MPI_Comm_rank");
if (argc == 1) {
/* Make sure that the current directory is in the path.
* Not all implementations may honor or understand this, but
* it is highly recommended as it gives users a clean way
* to specify the location of the executable without
* specifying a particular directory format (e.g., this
* should work with both Windows and Unix implementations) */
MPI_Info_create(&spawn_path);
MPI_Info_set(spawn_path, (char *) "path", (char *) ".");
IF_VERBOSE(("spawn connector.\n"));
error = MPI_Comm_spawn((char *) "disconnect_reconnect2",
argv1, numprocs, spawn_path, 0,
MPI_COMM_WORLD, &comm_connector, MPI_ERRCODES_IGNORE);
check_error(error, "MPI_Comm_spawn");
IF_VERBOSE(("spawn acceptor.\n"));
error = MPI_Comm_spawn((char *) "disconnect_reconnect2",
argv2, numprocs, spawn_path, 0,
MPI_COMM_WORLD, &comm_acceptor, MPI_ERRCODES_IGNORE);
check_error(error, "MPI_Comm_spawn");
MPI_Info_free(&spawn_path);
if (rank == 0) {
IF_VERBOSE(("recv port.\n"));
error = MPI_Recv(port, MPI_MAX_PORT_NAME, MPI_CHAR, 0, 0, comm_acceptor, &status);
check_error(error, "MPI_Recv");
IF_VERBOSE(("send port.\n"));
error = MPI_Send(port, MPI_MAX_PORT_NAME, MPI_CHAR, 0, 0, comm_connector);
check_error(error, "MPI_Send");
}
IF_VERBOSE(("barrier acceptor.\n"));
error = MPI_Barrier(comm_acceptor);
check_error(error, "MPI_Barrier");
IF_VERBOSE(("barrier connector.\n"));
error = MPI_Barrier(comm_connector);
check_error(error, "MPI_Barrier");
error = MPI_Comm_free(&comm_acceptor);
check_error(error, "MPI_Comm_free");
error = MPI_Comm_free(&comm_connector);
check_error(error, "MPI_Comm_free");
if (rank == 0) {
printf(" No Errors\n");
fflush(stdout);
}
} else if ((argc == 2) && (strcmp(argv[1], "acceptor") == 0)) {
IF_VERBOSE(("get_parent.\n"));
error = MPI_Comm_get_parent(&comm_parent);
check_error(error, "MPI_Comm_get_parent");
if (comm_parent == MPI_COMM_NULL) {
printf("acceptor's parent is NULL.\n");
fflush(stdout);
MPI_Abort(MPI_COMM_WORLD, -1);
}
if (rank == 0) {
IF_VERBOSE(("open_port.\n"));
error = MPI_Open_port(MPI_INFO_NULL, port);
check_error(error, "MPI_Open_port");
IF_VERBOSE(("0: opened port: <%s>\n", port));
IF_VERBOSE(("send.\n"));
error = MPI_Send(port, MPI_MAX_PORT_NAME, MPI_CHAR, 0, 0, comm_parent);
check_error(error, "MPI_Send");
}
for (i = 0; i < num_loops; i++) {
IF_VERBOSE(("accept.\n"));
error = MPI_Comm_accept(port, MPI_INFO_NULL, 0, MPI_COMM_WORLD, &comm);
check_error(error, "MPI_Comm_accept");
if (rank == 0) {
data = i;
error = MPI_Send(&data, 1, MPI_INT, 0, 0, comm);
check_error(error, "MPI_Send");
error = MPI_Recv(&data, 1, MPI_INT, 0, 0, comm, &status);
check_error(error, "MPI_Recv");
if (data != i) {
printf("expected %d but received %d\n", i, data);
fflush(stdout);
MPI_Abort(MPI_COMM_WORLD, 1);
}
}
IF_VERBOSE(("disconnect.\n"));
error = MPI_Comm_disconnect(&comm);
check_error(error, "MPI_Comm_disconnect");
}
if (rank == 0) {
IF_VERBOSE(("close_port.\n"));
error = MPI_Close_port(port);
check_error(error, "MPI_Close_port");
}
IF_VERBOSE(("barrier.\n"));
error = MPI_Barrier(comm_parent);
check_error(error, "MPI_Barrier");
MPI_Comm_free(&comm_parent);
} else if ((argc == 2) && (strcmp(argv[1], "connector") == 0)) {
IF_VERBOSE(("get_parent.\n"));
error = MPI_Comm_get_parent(&comm_parent);
check_error(error, "MPI_Comm_get_parent");
if (comm_parent == MPI_COMM_NULL) {
printf("acceptor's parent is NULL.\n");
fflush(stdout);
MPI_Abort(MPI_COMM_WORLD, -1);
}
if (rank == 0) {
IF_VERBOSE(("recv.\n"));
error = MPI_Recv(port, MPI_MAX_PORT_NAME, MPI_CHAR, 0, 0, comm_parent, &status);
check_error(error, "MPI_Recv");
IF_VERBOSE(("1: received port: <%s>\n", port));
}
for (i = 0; i < num_loops; i++) {
IF_VERBOSE(("connect.\n"));
error = MPI_Comm_connect(port, MPI_INFO_NULL, 0, MPI_COMM_WORLD, &comm);
check_error(error, "MPI_Comm_connect");
if (rank == 0) {
data = -1;
error = MPI_Recv(&data, 1, MPI_INT, 0, 0, comm, &status);
check_error(error, "MPI_Recv");
if (data != i) {
printf("expected %d but received %d\n", i, data);
fflush(stdout);
MPI_Abort(MPI_COMM_WORLD, 1);
}
error = MPI_Send(&data, 1, MPI_INT, 0, 0, comm);
check_error(error, "MPI_Send");
}
IF_VERBOSE(("disconnect.\n"));
error = MPI_Comm_disconnect(&comm);
check_error(error, "MPI_Comm_disconnect");
}
IF_VERBOSE(("barrier.\n"));
error = MPI_Barrier(comm_parent);
check_error(error, "MPI_Barrier");
MPI_Comm_free(&comm_parent);
} else {
printf("invalid command line.\n");
fflush(stdout);
{
int ii;
for (ii = 0; ii < argc; ii++) {
printf("argv[%d] = <%s>\n", ii, argv[ii]);
}
}
fflush(stdout);
MPI_Abort(MPI_COMM_WORLD, -2);
}
}
MPI_Finalize();
return MTestReturnValue(errs);
}
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