d076a13c1d
This patch is required in order to make python-mpi4py tests pass. It is also a bug in the openmpi implementation to see full discussion see https://www.open-mpi.org/community/lists/users/2015/11/28030.php
30 lines
1.2 KiB
Diff
30 lines
1.2 KiB
Diff
commit 4ee20ba31dd64b8f899447cdad78ec2379acfce7
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Author: Gilles Gouaillardet <gilles@rist.or.jp>
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Date: Tue Nov 10 08:59:03 2015 +0900
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fix NBC_Copy for legitimate zero size messages
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(back ported from commit open-mpi/ompi@0bd765eddd33e3d4ac18ec644c60a5c160cb48dc)
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(back ported from commit open-mpi/ompi@9a70765f27fdf17e70e1a115754fef7e5f16132a)
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diff --git a/ompi/mca/coll/libnbc/nbc_internal.h b/ompi/mca/coll/libnbc/nbc_internal.h
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index bf2f1cb..81be8cc 100644
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--- a/ompi/mca/coll/libnbc/nbc_internal.h
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+++ b/ompi/mca/coll/libnbc/nbc_internal.h
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@@ -501,7 +501,14 @@ static inline int NBC_Copy(void *src, int srccount, MPI_Datatype srctype, void *
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} else {
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/* we have to pack and unpack */
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res = MPI_Pack_size(srccount, srctype, comm, &size);
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- if (MPI_SUCCESS != res || 0 == size) { printf("MPI Error in MPI_Pack_size() (%i:%i)\n", res, size); return (MPI_SUCCESS == res) ? MPI_ERR_SIZE : res;}
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+ if (MPI_SUCCESS != res) {
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+ printf ("MPI Error in MPI_Pack_size() (%i:%i)", res, size);
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+ return res;
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+ }
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+
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+ if (0 == size) {
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+ return OMPI_SUCCESS;
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+ }
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packbuf = malloc(size);
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if (NULL == packbuf) { printf("Error in malloc()\n"); return res; }
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pos=0;
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