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commDup.c

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Last change on this file was ea777aa, checked in by Alex Wilton <awilton@…>, 3 years ago

Moved examples, include, build_default.properties, common.xml, and README out from dev.civl.com into the root of the repo.

git-svn-id: svn://vsl.cis.udel.edu/civl/trunk@5704 fb995dde-84ed-4084-dfe6-e5aef3e2452c

File size: 591 bytes

Rev	Line
[1079bef]	1	/* commDup.c : A simple example shows how to use the MPI_Routine
	2	MPI_Comm_dup(MPI_Comm*).
	3	*/
	4	#include <mpi.h>
	5	#include <assert.h>
	6
	7	int main(int argc, char * argv[]) {
	8	int size, rank, buf;
	9	MPI_Comm anotherComm;
	10
	11	MPI_Init(&argc, &argv);
	12	MPI_Comm_rank(MPI_COMM_WORLD, &rank);
	13	MPI_Comm_size(MPI_COMM_WORLD, &size);
	14	MPI_Comm_dup(MPI_COMM_WORLD, &anotherComm);
	15
	16	MPI_Reduce(&rank, &buf, 1, MPI_INT, MPI_SUM, 0, MPI_COMM_WORLD);
	17	MPI_Bcast(&buf, 1, MPI_INT, 0, anotherComm);
	18	assert(buf == ((size - 1) * size / 2));
	19	MPI_Comm_free(&anotherComm);
	20	MPI_Finalize();
	21	return 0;
	22	}

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