Fix performance regression caused by enabling opal thread support #1909
+181
−155
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This commit adds opal_using_threads() protection around the atomic operation in OBJ_RETAIN/OBJ_RELEASE. This resolves the performance issues seen when running psm with MPI_THREAD_SINGLE. To avoid issues with header dependencies opal_using_threads() has been moved to a new header (thread_usage.h). The OPAL_THREAD_ADD* and OPAL_THREAD_CMPSET* macros have also been relocated to this header. This commit is cherry-picked off a fix that was submitted for the v1.8 release series but never applied to master. This fixes part of the problem reported by @nysal in open-mpi#1902. (cherry picked from commit open-mpi/ompi-release@ce91307) Signed-off-by: Nathan Hjelm <hjelmn@me.com>
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
This commit adds opal_using_threads() protection around the atomic
operation in OBJ_RETAIN/OBJ_RELEASE. This resolves the performance
issues seen when running psm with MPI_THREAD_SINGLE.
To avoid issues with header dependencies opal_using_threads() has been
moved to a new header (thread_usage.h). The OPAL_THREAD_ADD* and
OPAL_THREAD_CMPSET* macros have also been relocated to this header.
This commit is cherry-picked off a fix that was submitted for the v1.8
release series but never applied to master. This fixes part of the
problem reported by @nysal in #1902.
(cherry picked from commit open-mpi/ompi-release@ce91307)
Signed-off-by: Nathan Hjelm hjelmn@me.com