main
test-branch
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Last change
on this file since bb03188 was ea777aa, checked in by Alex Wilton <awilton@…>, 3 years ago |
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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
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Property mode
set to
100644
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File size:
676 bytes
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| 1 | /* Illustrates non-interference of collectives and point-to-point operations.
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| 2 | * Program is erroneous since a collective is interspersed between a matching
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| 3 | * send and recv. It will work correctly if buffering, but not synchronously.
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| 4 | */
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| 5 | #include <mpi.h>
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| 6 |
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| 7 | double x;
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| 8 | double y;
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| 9 |
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| 10 | void main() {
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| 11 | int argc;
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| 12 | char **argv;
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| 13 | int rank;
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| 14 |
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| 15 | x = 0;
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| 16 | y = 0;
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| 17 | MPI_Init(&argc,&argv);
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| 18 | MPI_Comm_rank(MPI_COMM_WORLD, &rank);
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| 19 | if (rank==0) {
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| 20 | MPI_Send(&x, 1, MPI_DOUBLE, 1, 0, MPI_COMM_WORLD);
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| 21 | }
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| 22 | MPI_Bcast(&y, 1, MPI_DOUBLE, 0, MPI_COMM_WORLD);
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| 23 | if (rank==1) {
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| 24 | MPI_Recv(&x, 1, MPI_DOUBLE, 0, MPI_ANY_TAG, MPI_COMM_WORLD,
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| 25 | MPI_STATUS_IGNORE);
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| 26 | }
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| 27 | MPI_Finalize();
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| 28 | }
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