* Notes on the test.
*
* To ensure that messages remain in the bsend buffer until received,
- * messages are sent with size MSG_SIZE (ints).
+ * messages are sent with size MSG_SIZE (ints).
*/
#define MSG_SIZE 17000
-int main( int argc, char *argv[] )
+int main(int argc, char *argv[])
{
int errs = 0;
int b1[MSG_SIZE], b2[MSG_SIZE], b3[MSG_SIZE], b4[MSG_SIZE];
MPI_Comm comm;
MPI_Status status;
- MTest_Init( &argc, &argv );
+ MTest_Init(&argc, &argv);
- MPI_Errhandler_set( MPI_COMM_WORLD, MPI_ERRORS_RETURN );
+ MPI_Errhandler_set(MPI_COMM_WORLD, MPI_ERRORS_RETURN);
comm = MPI_COMM_WORLD;
- MPI_Comm_rank( comm, &rank );
- MPI_Comm_size( comm, &size );
+ MPI_Comm_rank(comm, &rank);
+ MPI_Comm_size(comm, &size);
if (size < 2) {
- errs++;
- fprintf( stderr, "At least 2 processes required\n" );
- MPI_Abort( MPI_COMM_WORLD, 1 );
- exit(1);
+ errs++;
+ fprintf(stderr, "At least 2 processes required\n");
+ MPI_Abort(MPI_COMM_WORLD, 1);
}
- src = 0;
+ src = 0;
dest = 1;
if (rank == src) {
- int *buf, bufsize, bsize;
-
- bufsize = 4 * (MSG_SIZE * sizeof(int) + MPI_BSEND_OVERHEAD);
- buf = (int *)malloc( bufsize );
- if (!buf) {
- fprintf( stderr, "Could not allocate buffer of %d bytes\n",
- bufsize );
- MPI_Abort( MPI_COMM_WORLD, 1 );
- exit(1);
- }
- MPI_Buffer_attach( buf, bufsize );
-
- /* Initialize data */
- for (i=0; i<MSG_SIZE; i++) {
- b1[i] = i;
- b2[i] = MSG_SIZE + i;
- b3[i] = 2 * MSG_SIZE + i;
- b4[i] = 3 * MSG_SIZE + i;
- }
- /* Send and reset buffers after bsend returns */
- MPI_Bsend( b1, MSG_SIZE, MPI_INT, dest, 0, comm );
- for (i=0; i<MSG_SIZE; i++) b1[i] = -b1[i];
- MPI_Bsend( b2, MSG_SIZE, MPI_INT, dest, 1, comm );
- for (i=0; i<MSG_SIZE; i++) b2[i] = -b2[i];
- MPI_Bsend( b3, MSG_SIZE, MPI_INT, dest, 2, comm );
- for (i=0; i<MSG_SIZE; i++) b3[i] = -b3[i];
- MPI_Bsend( b4, MSG_SIZE, MPI_INT, dest, 3, comm );
- for (i=0; i<MSG_SIZE; i++) b4[i] = -b4[i];
-
- MPI_Barrier( comm );
- /* Detach waits until all messages received */
- MPI_Buffer_detach( &buf, &bsize );
+ int *buf, bufsize, bsize;
+
+ bufsize = 4 * (MSG_SIZE * sizeof(int) + MPI_BSEND_OVERHEAD);
+ buf = (int *) malloc(bufsize);
+ if (!buf) {
+ fprintf(stderr, "Could not allocate buffer of %d bytes\n", bufsize);
+ MPI_Abort(MPI_COMM_WORLD, 1);
+ }
+ MPI_Buffer_attach(buf, bufsize);
+
+ /* Initialize data */
+ for (i = 0; i < MSG_SIZE; i++) {
+ b1[i] = i;
+ b2[i] = MSG_SIZE + i;
+ b3[i] = 2 * MSG_SIZE + i;
+ b4[i] = 3 * MSG_SIZE + i;
+ }
+ /* Send and reset buffers after bsend returns */
+ MPI_Bsend(b1, MSG_SIZE, MPI_INT, dest, 0, comm);
+ for (i = 0; i < MSG_SIZE; i++)
+ b1[i] = -b1[i];
+ MPI_Bsend(b2, MSG_SIZE, MPI_INT, dest, 1, comm);
+ for (i = 0; i < MSG_SIZE; i++)
+ b2[i] = -b2[i];
+ MPI_Bsend(b3, MSG_SIZE, MPI_INT, dest, 2, comm);
+ for (i = 0; i < MSG_SIZE; i++)
+ b3[i] = -b3[i];
+ MPI_Bsend(b4, MSG_SIZE, MPI_INT, dest, 3, comm);
+ for (i = 0; i < MSG_SIZE; i++)
+ b4[i] = -b4[i];
+
+ MPI_Barrier(comm);
+ /* Detach waits until all messages received */
+ MPI_Buffer_detach(&buf, &bsize);
+ free(buf);
}
else if (rank == dest) {
-
- MPI_Barrier( comm );
- MPI_Recv( b2, MSG_SIZE, MPI_INT, src, 1, comm, &status );
- MPI_Recv( b1, MSG_SIZE, MPI_INT, src, 0, comm, &status );
- MPI_Recv( b4, MSG_SIZE, MPI_INT, src, 3, comm, &status );
- MPI_Recv( b3, MSG_SIZE, MPI_INT, src, 2, comm, &status );
-
- /* Check received data */
- for (i=0; i<MSG_SIZE; i++) {
- if (b1[i] != i) {
- errs++;
- if (errs < 16) printf( "b1[%d] is %d\n", i, b1[i] );
- }
- if (b2[i] != MSG_SIZE + i) {
- errs++;
- if (errs < 16) printf( "b2[%d] is %d\n", i, b2[i] );
- }
- if (b3[i] != 2 * MSG_SIZE + i) {
- errs++;
- if (errs < 16) printf( "b3[%d] is %d\n", i, b3[i] );
- }
- if (b4[i] != 3 * MSG_SIZE + i) {
- errs++;
- if (errs < 16) printf( "b4[%d] is %d\n", i, b4[i] );
- }
- }
+
+ MPI_Barrier(comm);
+ MPI_Recv(b2, MSG_SIZE, MPI_INT, src, 1, comm, &status);
+ MPI_Recv(b1, MSG_SIZE, MPI_INT, src, 0, comm, &status);
+ MPI_Recv(b4, MSG_SIZE, MPI_INT, src, 3, comm, &status);
+ MPI_Recv(b3, MSG_SIZE, MPI_INT, src, 2, comm, &status);
+
+ /* Check received data */
+ for (i = 0; i < MSG_SIZE; i++) {
+ if (b1[i] != i) {
+ errs++;
+ if (errs < 16)
+ printf("b1[%d] is %d\n", i, b1[i]);
+ }
+ if (b2[i] != MSG_SIZE + i) {
+ errs++;
+ if (errs < 16)
+ printf("b2[%d] is %d\n", i, b2[i]);
+ }
+ if (b3[i] != 2 * MSG_SIZE + i) {
+ errs++;
+ if (errs < 16)
+ printf("b3[%d] is %d\n", i, b3[i]);
+ }
+ if (b4[i] != 3 * MSG_SIZE + i) {
+ errs++;
+ if (errs < 16)
+ printf("b4[%d] is %d\n", i, b4[i]);
+ }
+ }
}
else {
- MPI_Barrier( comm );
+ MPI_Barrier(comm);
}
- MTest_Finalize( errs );
+ MTest_Finalize(errs);
MPI_Finalize();
return 0;
-
+
}
