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It looks like using MAP_PRIVATE instead of MAP_SHARED greatly
speeds up infiniband memory registration.

Change-Id: Id7089f58458ef8fff4034a2c4707d31f7e8b6694
(cherry picked from commit 89535a3)
@jsquyres jsquyres added this to the v1.8.4 milestone Oct 6, 2014
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jsquyres commented Oct 6, 2014

@miked-mellanox tells me in IM that this has been reviewed.

rhc54 pushed a commit that referenced this pull request Oct 7, 2014
OSHMEM: fix memheap/sshmem/mmap to use MAP_PRIVATE instead of SHARED to speedup registration
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@rhc54 rhc54 merged commit bb3e8dc into open-mpi:v1.8 Oct 7, 2014
@mike-dubman mike-dubman deleted the topic/fix-mmap-mode branch October 7, 2014 20:30
mike-dubman added a commit to mike-dubman/ompi-release that referenced this pull request Nov 5, 2014
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@ggouaillardet @jsquyres please have a look at it!

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@ggouaillardet @jsquyres please have a look at it!

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5 participants