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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 "mpitest.h"
/*
static char MTEST_Descrip[] = "Test of various send cancel calls";
*/
int main(int argc, char *argv[])
{
int errs = 0;
int rank, size, dest;
MPI_Comm comm;
MPI_Status status;
MPI_Request req;
static int bufsizes[4] = { 1, 100, 10000, 1000000 };
char *buf;
int cs, flag, n;
#ifdef TEST_IRSEND
int veryPicky = 0; /* Set to 1 to test "quality of implementation" in
* a tricky part of cancel */
#endif
MTest_Init(&argc, &argv);
comm = MPI_COMM_WORLD;
MPI_Comm_rank(comm, &rank);
MPI_Comm_size(comm, &size);
dest = size - 1;
for (cs = 0; cs < 4; cs++) {
if (rank == 0) {
n = bufsizes[cs];
buf = (char *) malloc(n);
if (!buf) {
fprintf(stderr, "Unable to allocate %d bytes\n", n);
MPI_Abort(MPI_COMM_WORLD, 1);
}
MPI_Send_init(buf, n, MPI_CHAR, dest, cs + n + 1, comm, &req);
MPI_Start(&req);
MPI_Cancel(&req);
MPI_Wait(&req, &status);
MPI_Test_cancelled(&status, &flag);
if (!flag) {
errs++;
printf("Failed to cancel a persistent send request\n");
fflush(stdout);
} else {
n = 0;
}
MPI_Request_free(&req);
/* Send the size, zero for successfully cancelled */
MPI_Send(&n, 1, MPI_INT, dest, 123, comm);
/* Send the tag so the message can be received */
n = cs + n + 1;
MPI_Send(&n, 1, MPI_INT, dest, 123, comm);
free(buf);
} else if (rank == dest) {
int nn, tag;
char *btemp;
MPI_Recv(&nn, 1, MPI_INT, 0, 123, comm, &status);
MPI_Recv(&tag, 1, MPI_INT, 0, 123, comm, &status);
if (nn > 0) {
/* If the message was not cancelled, receive it here */
btemp = (char *) malloc(nn);
if (!btemp) {
fprintf(stderr, "Unable to allocate %d bytes\n", nn);
MPI_Abort(MPI_COMM_WORLD, 1);
}
MPI_Recv(btemp, nn, MPI_CHAR, 0, tag, comm, &status);
free(btemp);
}
}
MPI_Barrier(comm);
if (rank == 0) {
char *bsendbuf;
int bsendbufsize;
int bf, bs;
n = bufsizes[cs];
buf = (char *) malloc(n);
if (!buf) {
fprintf(stderr, "Unable to allocate %d bytes\n", n);
MPI_Abort(MPI_COMM_WORLD, 1);
}
bsendbufsize = n + MPI_BSEND_OVERHEAD;
bsendbuf = (char *) malloc(bsendbufsize);
if (!bsendbuf) {
fprintf(stderr, "Unable to allocate %d bytes for bsend\n", n);
MPI_Abort(MPI_COMM_WORLD, 1);
}
MPI_Buffer_attach(bsendbuf, bsendbufsize);
MPI_Bsend_init(buf, n, MPI_CHAR, dest, cs + n + 2, comm, &req);
MPI_Start(&req);
MPI_Cancel(&req);
MPI_Wait(&req, &status);
MPI_Test_cancelled(&status, &flag);
if (!flag) {
errs++;
printf("Failed to cancel a persistent bsend request\n");
fflush(stdout);
} else {
n = 0;
}
MPI_Request_free(&req);
/* Send the size, zero for successfully cancelled */
MPI_Send(&n, 1, MPI_INT, dest, 123, comm);
/* Send the tag so the message can be received */
n = cs + n + 2;
MPI_Send(&n, 1, MPI_INT, dest, 123, comm);
free(buf);
MPI_Buffer_detach(&bf, &bs);
free(bsendbuf);
} else if (rank == dest) {
int nn, tag;
char *btemp;
MPI_Recv(&nn, 1, MPI_INT, 0, 123, comm, &status);
MPI_Recv(&tag, 1, MPI_INT, 0, 123, comm, &status);
if (nn > 0) {
/* If the message was not cancelled, receive it here */
btemp = (char *) malloc(nn);
if (!btemp) {
fprintf(stderr, "Unable to allocate %d bytes\n", nn);
MPI_Abort(MPI_COMM_WORLD, 1);
}
MPI_Recv(btemp, nn, MPI_CHAR, 0, tag, comm, &status);
free(btemp);
}
}
MPI_Barrier(comm);
/* Because this test is erroneous, we do not perform it unless
* TEST_IRSEND is defined. */
#ifdef TEST_IRSEND
/* We avoid ready send to self because an implementation
* is free to detect the error in delivering a message to
* itself without a pending receive; we could also check
* for an error return from the MPI_Irsend */
if (rank == 0 && dest != rank) {
n = bufsizes[cs];
buf = (char *) malloc(n);
if (!buf) {
fprintf(stderr, "Unable to allocate %d bytes\n", n);
MPI_Abort(MPI_COMM_WORLD, 1);
}
MPI_Rsend_init(buf, n, MPI_CHAR, dest, cs + n + 3, comm, &req);
MPI_Start(&req);
MPI_Cancel(&req);
MPI_Wait(&req, &status);
MPI_Test_cancelled(&status, &flag);
/* This can be pretty ugly. The standard is clear (Section 3.8)
* that either a sent message is received or the
* sent message is successfully cancelled. Since this message
* can never be received, the cancel must complete
* successfully.
*
* However, since there is no matching receive, this
* program is erroneous. In this case, we can't really
* flag this as an error */
if (!flag && veryPicky) {
errs++;
printf("Failed to cancel a persistent rsend request\n");
fflush(stdout);
}
if (flag) {
n = 0;
}
MPI_Request_free(&req);
/* Send the size, zero for successfully cancelled */
MPI_Send(&n, 1, MPI_INT, dest, 123, comm);
/* Send the tag so the message can be received */
n = cs + n + 3;
MPI_Send(&n, 1, MPI_INT, dest, 123, comm);
free(buf);
} else if (rank == dest) {
int n, tag;
char *btemp;
MPI_Recv(&n, 1, MPI_INT, 0, 123, comm, &status);
MPI_Recv(&tag, 1, MPI_INT, 0, 123, comm, &status);
if (n > 0) {
/* If the message was not cancelled, receive it here */
btemp = (char *) malloc(n);
if (!btemp) {
fprintf(stderr, "Unable to allocate %d bytes\n", n);
MPI_Abort(MPI_COMM_WORLD, 1);
}
MPI_Recv(btemp, n, MPI_CHAR, 0, tag, comm, &status);
free(btemp);
}
}
MPI_Barrier(comm);
#endif
if (rank == 0) {
n = bufsizes[cs];
buf = (char *) malloc(n);
if (!buf) {
fprintf(stderr, "Unable to allocate %d bytes\n", n);
MPI_Abort(MPI_COMM_WORLD, 1);
}
MPI_Ssend_init(buf, n, MPI_CHAR, dest, cs + n + 4, comm, &req);
MPI_Start(&req);
MPI_Cancel(&req);
MPI_Wait(&req, &status);
MPI_Test_cancelled(&status, &flag);
if (!flag) {
errs++;
printf("Failed to cancel a persistent ssend request\n");
fflush(stdout);
} else {
n = 0;
}
MPI_Request_free(&req);
/* Send the size, zero for successfully cancelled */
MPI_Send(&n, 1, MPI_INT, dest, 123, comm);
/* Send the tag so the message can be received */
n = cs + n + 4;
MPI_Send(&n, 1, MPI_INT, dest, 123, comm);
free(buf);
} else if (rank == dest) {
int nn, tag;
char *btemp;
MPI_Recv(&nn, 1, MPI_INT, 0, 123, comm, &status);
MPI_Recv(&tag, 1, MPI_INT, 0, 123, comm, &status);
if (nn > 0) {
/* If the message was not cancelled, receive it here */
btemp = (char *) malloc(nn);
if (!btemp) {
fprintf(stderr, "Unable to allocate %d bytes\n", nn);
MPI_Abort(MPI_COMM_WORLD, 1);
}
MPI_Recv(btemp, nn, MPI_CHAR, 0, tag, comm, &status);
free(btemp);
}
}
MPI_Barrier(comm);
}
MTest_Finalize(errs);
return MTestReturnValue(errs);
}
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