#include <stdlib.h>
#include <stdio.h>
-/* Gather data from a vector to contiguous. This is
+/* Gather data from a vector to contiguous. This is
the trivial version based on the allgather test (allgatherv but with
constant data sizes) */
-int main( int argc, char **argv )
+int main(int argc, char **argv)
{
double *vecout, *invec;
MPI_Comm comm;
- int count, minsize = 2;
- int i, errs = 0;
- int rank, size;
- int *displs, *recvcounts;
+ int count, minsize = 2;
+ int i, errs = 0;
+ int rank, size;
+ int *displs, *recvcounts;
- MTest_Init( &argc, &argv );
+ MTest_Init(&argc, &argv);
- while (MTestGetIntracommGeneral( &comm, minsize, 1 )) {
- if (comm == MPI_COMM_NULL) continue;
- /* Determine the sender and receiver */
- MPI_Comm_rank( comm, &rank );
- MPI_Comm_size( comm, &size );
+ while (MTestGetIntracommGeneral(&comm, minsize, 1)) {
+ if (comm == MPI_COMM_NULL)
+ continue;
+ /* Determine the sender and receiver */
+ MPI_Comm_rank(comm, &rank);
+ MPI_Comm_size(comm, &size);
+
+ displs = (int *) malloc(size * sizeof(int));
+ recvcounts = (int *) malloc(size * sizeof(int));
- displs = (int *)malloc( size * sizeof(int) );
- recvcounts = (int *)malloc( size * sizeof(int) );
-
for (count = 1; count < 9000; count = count * 2) {
- invec = (double *)malloc( count * sizeof(double) );
- vecout = (double *)malloc( size * count * sizeof(double) );
-
- for (i=0; i<count; i++) {
- invec[i] = rank*count+i;
+ invec = (double *) malloc(count * sizeof(double));
+ vecout = (double *) malloc(size * count * sizeof(double));
+
+ for (i = 0; i < count; i++) {
+ invec[i] = rank * count + i;
}
- for (i=0; i<size; i++) {
+ for (i = 0; i < size; i++) {
recvcounts[i] = count;
- displs[i] = i * count;
+ displs[i] = i * count;
}
- MPI_Allgatherv( invec, count, MPI_DOUBLE,
- vecout, recvcounts, displs, MPI_DOUBLE, comm );
- for (i=0; i<count*size; i++) {
+ MPI_Allgatherv(invec, count, MPI_DOUBLE, vecout, recvcounts, displs, MPI_DOUBLE, comm);
+ for (i = 0; i < count * size; i++) {
if (vecout[i] != i) {
errs++;
if (errs < 10) {
- fprintf( stderr, "vecout[%d]=%d\n",
- i, (int)vecout[i] );
+ fprintf(stderr, "vecout[%d]=%d\n", i, (int) vecout[i]);
}
}
}
- free( invec );
- free( vecout );
+ free(invec);
+ free(vecout);
}
- free( displs );
- free( recvcounts );
- MTestFreeComm( &comm );
+ free(displs);
+ free(recvcounts);
+ MTestFreeComm(&comm);
}
-
- MTest_Finalize( errs );
+
+ MTest_Finalize(errs);
MPI_Finalize();
return 0;
}
-
-
