/* stdlib.h Needed for malloc declaration */
#include <stdlib.h>
-int main( int argc, char **argv )
+int main(int argc, char **argv)
{
- int errs=0, toterr;
+ int errs = 0, toterr;
MPI_Group basegroup;
MPI_Group g1, g2, g3, g4, g5, g6, g7, g8, g9, g10;
MPI_Group g3a, g3b;
- MPI_Comm comm, newcomm, splitcomm, dupcomm;
- int i, grp_rank, rank, grp_size, size, result;
- int nranks, *ranks, *ranks_out;
- int range[1][3];
- int worldrank;
+ MPI_Comm comm, newcomm, splitcomm, dupcomm;
+ int i, grp_rank, rank, grp_size, size, result;
+ int nranks, *ranks, *ranks_out;
+ int range[1][3];
+ int worldrank;
- MPI_Init( &argc, &argv );
- MPI_Comm_rank( MPI_COMM_WORLD, &worldrank );
+ MPI_Init(&argc, &argv);
+ MPI_Comm_rank(MPI_COMM_WORLD, &worldrank);
comm = MPI_COMM_WORLD;
- MPI_Comm_group( comm, &basegroup );
- MPI_Comm_rank( comm, &rank );
- MPI_Comm_size( comm, &size );
+ MPI_Comm_group(comm, &basegroup);
+ MPI_Comm_rank(comm, &rank);
+ MPI_Comm_size(comm, &size);
/* Get the basic information on this group */
- MPI_Group_rank( basegroup, &grp_rank );
+ MPI_Group_rank(basegroup, &grp_rank);
if (grp_rank != rank) {
- errs++;
- fprintf( stdout, "group rank %d != comm rank %d\n", grp_rank, rank );
+ errs++;
+ fprintf(stdout, "group rank %d != comm rank %d\n", grp_rank, rank);
}
- MPI_Group_size( basegroup, &grp_size );
+ MPI_Group_size(basegroup, &grp_size);
if (grp_size != size) {
- errs++;
- fprintf( stdout, "group size %d != comm size %d\n", grp_size, size );
+ errs++;
+ fprintf(stdout, "group size %d != comm size %d\n", grp_size, size);
}
/* Form a new communicator with inverted ranking */
- MPI_Comm_split( comm, 0, size - rank, &newcomm );
- MPI_Comm_group( newcomm, &g1 );
- ranks = (int *)malloc( size * sizeof(int) );
- ranks_out = (int *)malloc( size * sizeof(int) );
- for (i=0; i<size; i++) ranks[i] = i;
+ MPI_Comm_split(comm, 0, size - rank, &newcomm);
+ MPI_Comm_group(newcomm, &g1);
+ ranks = (int *) malloc(size * sizeof(int));
+ ranks_out = (int *) malloc(size * sizeof(int));
+ for (i = 0; i < size; i++)
+ ranks[i] = i;
nranks = size;
- MPI_Group_translate_ranks( g1, nranks, ranks, basegroup, ranks_out );
- for (i=0; i<size; i++) {
- if (ranks_out[i] != (size - 1) - i) {
- errs++;
- fprintf( stdout, "Translate ranks got %d expected %d\n",
- ranks_out[i], (size - 1) - i );
- }
+ MPI_Group_translate_ranks(g1, nranks, ranks, basegroup, ranks_out);
+ for (i = 0; i < size; i++) {
+ if (ranks_out[i] != (size - 1) - i) {
+ errs++;
+ fprintf(stdout, "Translate ranks got %d expected %d\n", ranks_out[i], (size - 1) - i);
+ }
}
/* Check Compare */
- MPI_Group_compare( basegroup, g1, &result );
+ MPI_Group_compare(basegroup, g1, &result);
if (result != MPI_SIMILAR) {
- errs++;
- fprintf( stdout, "Group compare should have been similar, was %d\n",
- result );
+ errs++;
+ fprintf(stdout, "Group compare should have been similar, was %d\n", result);
}
- MPI_Comm_dup( comm, &dupcomm );
- MPI_Comm_group( dupcomm, &g2 );
- MPI_Group_compare( basegroup, g2, &result );
+ MPI_Comm_dup(comm, &dupcomm);
+ MPI_Comm_group(dupcomm, &g2);
+ MPI_Group_compare(basegroup, g2, &result);
if (result != MPI_IDENT) {
- errs++;
- fprintf( stdout, "Group compare should have been ident, was %d\n",
- result );
+ errs++;
+ fprintf(stdout, "Group compare should have been ident, was %d\n", result);
}
- MPI_Comm_split( comm, rank < size/2, rank, &splitcomm );
- MPI_Comm_group( splitcomm, &g3 );
- MPI_Group_compare( basegroup, g3, &result );
+ MPI_Comm_split(comm, rank < size / 2, rank, &splitcomm);
+ MPI_Comm_group(splitcomm, &g3);
+ MPI_Group_compare(basegroup, g3, &result);
if (result != MPI_UNEQUAL) {
- errs++;
- fprintf( stdout, "Group compare should have been unequal, was %d\n",
- result );
+ errs++;
+ fprintf(stdout, "Group compare should have been unequal, was %d\n", result);
}
/* Build two groups that have this process and one other, but do not
- have the same processes */
+ * have the same processes */
ranks[0] = rank;
ranks[1] = (rank + 1) % size;
- MPI_Group_incl( basegroup, 2, ranks, &g3a );
+ MPI_Group_incl(basegroup, 2, ranks, &g3a);
ranks[1] = (rank + size - 1) % size;
- MPI_Group_incl( basegroup, 2, ranks, &g3b );
- MPI_Group_compare( g3a, g3b, &result );
+ MPI_Group_incl(basegroup, 2, ranks, &g3b);
+ MPI_Group_compare(g3a, g3b, &result);
if (result != MPI_UNEQUAL) {
errs++;
- fprintf( stdout, "Group compare of equal sized but different groups should have been unequal, was %d\n", result );
+ fprintf(stdout,
+ "Group compare of equal sized but different groups should have been unequal, was %d\n",
+ result);
}
-
+
/* Build two new groups by excluding members; use Union to put them
together again */
/* Exclude 0 */
- for (i=0; i<size; i++) ranks[i] = i;
- MPI_Group_excl( basegroup, 1, ranks, &g4 );
+ for (i = 0; i < size; i++)
+ ranks[i] = i;
+ MPI_Group_excl(basegroup, 1, ranks, &g4);
/* Exclude 1-(size-1) */
- MPI_Group_excl( basegroup, size-1, ranks+1, &g5 );
- MPI_Group_union( g5, g4, &g6 );
- MPI_Group_compare( basegroup, g6, &result );
+ MPI_Group_excl(basegroup, size - 1, ranks + 1, &g5);
+ MPI_Group_union(g5, g4, &g6);
+ MPI_Group_compare(basegroup, g6, &result);
if (result != MPI_IDENT) {
- int usize;
- errs++;
- /* See ordering requirements on union */
- fprintf( stdout, "Group excl and union did not give ident groups\n" );
- fprintf( stdout, "[%d] result of compare was %d\n", rank, result );
- MPI_Group_size( g6, &usize );
- fprintf( stdout, "Size of union is %d, should be %d\n", usize, size );
+ int usize;
+ errs++;
+ /* See ordering requirements on union */
+ fprintf(stdout, "Group excl and union did not give ident groups\n");
+ fprintf(stdout, "[%d] result of compare was %d\n", rank, result);
+ MPI_Group_size(g6, &usize);
+ fprintf(stdout, "Size of union is %d, should be %d\n", usize, size);
}
- MPI_Group_union( basegroup, g4, &g7 );
- MPI_Group_compare( basegroup, g7, &result );
+ MPI_Group_union(basegroup, g4, &g7);
+ MPI_Group_compare(basegroup, g7, &result);
if (result != MPI_IDENT) {
- int usize;
- errs++;
- fprintf( stdout, "Group union of overlapping groups failed\n" );
- fprintf( stdout, "[%d] result of compare was %d\n", rank, result );
- MPI_Group_size( g7, &usize );
- fprintf( stdout, "Size of union is %d, should be %d\n", usize, size );
+ int usize;
+ errs++;
+ fprintf(stdout, "Group union of overlapping groups failed\n");
+ fprintf(stdout, "[%d] result of compare was %d\n", rank, result);
+ MPI_Group_size(g7, &usize);
+ fprintf(stdout, "Size of union is %d, should be %d\n", usize, size);
}
/* Use range_excl instead of ranks */
- /* printf ("range excl\n" ); fflush( stdout ); */
+ /* printf ("range excl\n"); fflush(stdout); */
range[0][0] = 1;
- range[0][1] = size-1;
+ range[0][1] = size - 1;
range[0][2] = 1;
- MPI_Group_range_excl( basegroup, 1, range, &g8 );
- /* printf( "out of range excl\n" ); fflush( stdout ); */
- MPI_Group_compare( g5, g8, &result );
- /* printf( "out of compare\n" ); fflush( stdout ); */
+ MPI_Group_range_excl(basegroup, 1, range, &g8);
+ /* printf("out of range excl\n"); fflush(stdout); */
+ MPI_Group_compare(g5, g8, &result);
+ /* printf("out of compare\n"); fflush(stdout); */
if (result != MPI_IDENT) {
- errs++;
- fprintf( stdout, "Group range excl did not give ident groups\n" );
+ errs++;
+ fprintf(stdout, "Group range excl did not give ident groups\n");
}
- /* printf( "intersection\n" ); fflush( stdout ); */
- MPI_Group_intersection( basegroup, g4, &g9 );
- MPI_Group_compare( g9, g4, &result );
+ /* printf("intersection\n"); fflush(stdout); */
+ MPI_Group_intersection(basegroup, g4, &g9);
+ MPI_Group_compare(g9, g4, &result);
if (result != MPI_IDENT) {
- errs++;
- fprintf( stdout, "Group intersection did not give ident groups\n" );
+ errs++;
+ fprintf(stdout, "Group intersection did not give ident groups\n");
}
/* Exclude EVERYTHING and check against MPI_GROUP_EMPTY */
- /* printf( "range excl all\n" ); fflush( stdout ); */
+ /* printf("range excl all\n"); fflush(stdout); */
range[0][0] = 0;
- range[0][1] = size-1;
+ range[0][1] = size - 1;
range[0][2] = 1;
- MPI_Group_range_excl( basegroup, 1, range, &g10 );
+ MPI_Group_range_excl(basegroup, 1, range, &g10);
- /* printf( "done range excl all\n" ); fflush(stdout); */
- MPI_Group_compare( g10, MPI_GROUP_EMPTY, &result );
- /* printf( "done compare to MPI_GROUP_EMPTY\n" ); fflush(stdout); */
+ /* printf("done range excl all\n"); fflush(stdout); */
+ MPI_Group_compare(g10, MPI_GROUP_EMPTY, &result);
+ /* printf("done compare to MPI_GROUP_EMPTY\n"); fflush(stdout); */
if (result != MPI_IDENT) {
- errs++;
- fprintf( stdout,
- "MPI_GROUP_EMPTY didn't compare against empty group\n");
+ errs++;
+ fprintf(stdout, "MPI_GROUP_EMPTY didn't compare against empty group\n");
}
- /* printf( "freeing groups\n" ); fflush( stdout ); */
- MPI_Group_free( &basegroup );
- MPI_Group_free( &g1 );
- MPI_Group_free( &g2 );
- MPI_Group_free( &g3 );
- MPI_Group_free( &g3a );
- MPI_Group_free( &g3b );
- MPI_Group_free( &g4 );
- MPI_Group_free( &g5 );
- MPI_Group_free( &g6 );
- MPI_Group_free( &g7 );
- MPI_Group_free( &g8 );
- MPI_Group_free( &g9 );
- MPI_Group_free( &g10 );
- MPI_Comm_free( &dupcomm );
- MPI_Comm_free( &splitcomm );
- MPI_Comm_free( &newcomm );
-
- MPI_Allreduce( &errs, &toterr, 1, MPI_INT, MPI_SUM, MPI_COMM_WORLD );
+ /* printf("freeing groups\n"); fflush(stdout); */
+ MPI_Group_free(&basegroup);
+ MPI_Group_free(&g1);
+ MPI_Group_free(&g2);
+ MPI_Group_free(&g3);
+ MPI_Group_free(&g3a);
+ MPI_Group_free(&g3b);
+ MPI_Group_free(&g4);
+ MPI_Group_free(&g5);
+ MPI_Group_free(&g6);
+ MPI_Group_free(&g7);
+ MPI_Group_free(&g8);
+ MPI_Group_free(&g9);
+ MPI_Group_free(&g10);
+ MPI_Comm_free(&dupcomm);
+ MPI_Comm_free(&splitcomm);
+ MPI_Comm_free(&newcomm);
+
+ MPI_Allreduce(&errs, &toterr, 1, MPI_INT, MPI_SUM, MPI_COMM_WORLD);
if (worldrank == 0) {
- if (toterr == 0)
- printf( " No Errors\n" );
- else
- printf( "Found %d errors in MPI Group routines\n", toterr );
+ if (toterr == 0)
+ printf(" No Errors\n");
+ else
+ printf("Found %d errors in MPI Group routines\n", toterr);
}
+ free(ranks);
+ free(ranks_out);
MPI_Finalize();
return toterr;
}
