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Synchronization problem under OpenMPI 1.6.5 #37

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mdjurfeldt opened this issue Feb 20, 2017 · 0 comments
Open

Synchronization problem under OpenMPI 1.6.5 #37

mdjurfeldt opened this issue Feb 20, 2017 · 0 comments

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@mdjurfeldt
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This is a reminder to further investigate a problem discovered in issue #35.

With a linear chain of applications, there seems to be a synchronization problem when MUSIC is compiled with OpenMPI 1.6.5. With the standard configuration, p2p communication does not properly synchronize with the receiver such that expected semantics for maxBuffered=1 is broken.

A workaround is to configure MUSIC with --disable-isend.
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@mdjurfeldt