Because there are separate send and receive types to alltoallv,
there need to be tests to rearrange data on the fly. Not done yet.
-
+
The first test sends i items to processor i from all processors.
Currently, the test uses only MPI_INT; this is adequate for testing systems
that use point-to-point operations
*/
-int main( int argc, char **argv )
+int main(int argc, char **argv)
{
MPI_Comm comm;
- int *sbuf, *rbuf;
- int rank, size;
- int *sendcounts, *recvcounts, *rdispls, *sdispls;
- int i, j, *p, err;
-
- MTest_Init( &argc, &argv );
+ int *sbuf, *rbuf;
+ int rank, size;
+ int *sendcounts, *recvcounts, *rdispls, *sdispls;
+ int i, j, *p, err;
+
+ MTest_Init(&argc, &argv);
err = 0;
-
- while (MTestGetIntracommGeneral( &comm, 2, 1 )) {
- if (comm == MPI_COMM_NULL) continue;
-
- /* Create the buffer */
- MPI_Comm_size( comm, &size );
- MPI_Comm_rank( comm, &rank );
- sbuf = (int *)malloc( size * size * sizeof(int) );
- rbuf = (int *)malloc( size * size * sizeof(int) );
- if (!sbuf || !rbuf) {
- fprintf( stderr, "Could not allocated buffers!\n" );
- MPI_Abort( comm, 1 );
- exit(1);
- }
-
- /* Load up the buffers */
- for (i=0; i<size*size; i++) {
- sbuf[i] = i + 100*rank;
- rbuf[i] = -i;
- }
-
- /* Create and load the arguments to alltoallv */
- sendcounts = (int *)malloc( size * sizeof(int) );
- recvcounts = (int *)malloc( size * sizeof(int) );
- rdispls = (int *)malloc( size * sizeof(int) );
- sdispls = (int *)malloc( size * sizeof(int) );
- if (!sendcounts || !recvcounts || !rdispls || !sdispls) {
- fprintf( stderr, "Could not allocate arg items!\n" );
- MPI_Abort( comm, 1 );
- exit(1);
- }
- for (i=0; i<size; i++) {
- sendcounts[i] = i;
- recvcounts[i] = rank;
- rdispls[i] = i * rank;
- sdispls[i] = (i * (i+1))/2;
- }
- MPI_Alltoallv( sbuf, sendcounts, sdispls, MPI_INT,
- rbuf, recvcounts, rdispls, MPI_INT, comm );
-
- /* Check rbuf */
- for (i=0; i<size; i++) {
- p = rbuf + rdispls[i];
- for (j=0; j<rank; j++) {
- if (p[j] != i * 100 + (rank*(rank+1))/2 + j) {
- fprintf( stderr, "[%d] got %d expected %d for %dth\n",
- rank, p[j],(i*(i+1))/2 + j, j );
- err++;
- }
- }
- }
-
- free( sdispls );
- free( sendcounts );
- free( sbuf );
-#if MTEST_HAVE_MIN_MPI_VERSION(2,2)
- /* check MPI_IN_PLACE, added in MPI-2.2 */
- free( rbuf );
- rbuf = (int *)malloc( size * (2 * size) * sizeof(int) );
- if (!rbuf) {
- fprintf( stderr, "Could not reallocate rbuf!\n" );
- MPI_Abort( comm, 1 );
- exit(1);
- }
-
- /* Load up the buffers */
- for (i = 0; i < size; i++) {
- recvcounts[i] = i + rank;
- rdispls[i] = i * (2 * size);
- }
- memset(rbuf, -1, size * (2 * size) * sizeof(int));
- for (i=0; i < size; i++) {
- p = rbuf + rdispls[i];
- for (j = 0; j < recvcounts[i]; ++j) {
- p[j] = 100 * rank + 10 * i + j;
+ while (MTestGetIntracommGeneral(&comm, 2, 1)) {
+ if (comm == MPI_COMM_NULL)
+ continue;
+
+ /* Create the buffer */
+ MPI_Comm_size(comm, &size);
+ MPI_Comm_rank(comm, &rank);
+ sbuf = (int *) malloc(size * size * sizeof(int));
+ rbuf = (int *) malloc(size * size * sizeof(int));
+ if (!sbuf || !rbuf) {
+ fprintf(stderr, "Could not allocated buffers!\n");
+ MPI_Abort(comm, 1);
}
- }
- MPI_Alltoallv( MPI_IN_PLACE, NULL, NULL, MPI_INT,
- rbuf, recvcounts, rdispls, MPI_INT, comm );
- /* Check rbuf */
- for (i=0; i<size; i++) {
- p = rbuf + rdispls[i];
- for (j=0; j<recvcounts[i]; j++) {
- int expected = 100 * i + 10 * rank + j;
- if (p[j] != expected) {
- fprintf(stderr, "[%d] got %d expected %d for block=%d, element=%dth\n",
- rank, p[j], expected, i, j);
- ++err;
- }
+
+ /* Load up the buffers */
+ for (i = 0; i < size * size; i++) {
+ sbuf[i] = i + 100 * rank;
+ rbuf[i] = -i;
}
- }
- /* Check to make sure that aliasing is disallowed correctly */
- MPI_Comm_set_errhandler(MPI_COMM_WORLD, MPI_ERRORS_RETURN);
- if (MPI_SUCCESS == MPI_Alltoallv(rbuf, recvcounts, rdispls, MPI_INT,
- rbuf, recvcounts, rdispls, MPI_INT, comm))
- err++;
+ /* Create and load the arguments to alltoallv */
+ sendcounts = (int *) malloc(size * sizeof(int));
+ recvcounts = (int *) malloc(size * sizeof(int));
+ rdispls = (int *) malloc(size * sizeof(int));
+ sdispls = (int *) malloc(size * sizeof(int));
+ if (!sendcounts || !recvcounts || !rdispls || !sdispls) {
+ fprintf(stderr, "Could not allocate arg items!\n");
+ MPI_Abort(comm, 1);
+ }
+ for (i = 0; i < size; i++) {
+ sendcounts[i] = i;
+ recvcounts[i] = rank;
+ rdispls[i] = i * rank;
+ sdispls[i] = (i * (i + 1)) / 2;
+ }
+ MPI_Alltoallv(sbuf, sendcounts, sdispls, MPI_INT, rbuf, recvcounts, rdispls, MPI_INT, comm);
+
+ /* Check rbuf */
+ for (i = 0; i < size; i++) {
+ p = rbuf + rdispls[i];
+ for (j = 0; j < rank; j++) {
+ if (p[j] != i * 100 + (rank * (rank + 1)) / 2 + j) {
+ fprintf(stderr, "[%d] got %d expected %d for %dth\n",
+ rank, p[j], (i * (i + 1)) / 2 + j, j);
+ err++;
+ }
+ }
+ }
+
+ free(sdispls);
+ free(sendcounts);
+ free(sbuf);
+
+#if MTEST_HAVE_MIN_MPI_VERSION(2,2)
+ /* check MPI_IN_PLACE, added in MPI-2.2 */
+ free(rbuf);
+ rbuf = (int *) malloc(size * (2 * size) * sizeof(int));
+ if (!rbuf) {
+ fprintf(stderr, "Could not reallocate rbuf!\n");
+ MPI_Abort(comm, 1);
+ }
+
+ /* Load up the buffers */
+ for (i = 0; i < size; i++) {
+ recvcounts[i] = i + rank;
+ rdispls[i] = i * (2 * size);
+ }
+ memset(rbuf, -1, size * (2 * size) * sizeof(int));
+ for (i = 0; i < size; i++) {
+ p = rbuf + rdispls[i];
+ for (j = 0; j < recvcounts[i]; ++j) {
+ p[j] = 100 * rank + 10 * i + j;
+ }
+ }
+ MPI_Alltoallv(MPI_IN_PLACE, NULL, NULL, MPI_INT, rbuf, recvcounts, rdispls, MPI_INT, comm);
+ /* Check rbuf */
+ for (i = 0; i < size; i++) {
+ p = rbuf + rdispls[i];
+ for (j = 0; j < recvcounts[i]; j++) {
+ int expected = 100 * i + 10 * rank + j;
+ if (p[j] != expected) {
+ fprintf(stderr, "[%d] got %d expected %d for block=%d, element=%dth\n",
+ rank, p[j], expected, i, j);
+ ++err;
+ }
+ }
+ }
#endif
- free( rdispls );
- free( recvcounts );
- free( rbuf );
- MTestFreeComm( &comm );
+ free(rdispls);
+ free(recvcounts);
+ free(rbuf);
+ MTestFreeComm(&comm);
}
- MTest_Finalize( err );
+ MTest_Finalize(err);
MPI_Finalize();
return 0;
}
