[v5.0.x] btl/smcuda: Add atomic_wmb() before sm_fifo_write #12343
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 change fixes open-mpi#12270 Testing on c7g instance type (arm64) confirms this change elminates hangs and crashes that were previously observed in 1 in 30 runs of IMB alltoall benchmark. Tested with over 300 runs and no failures. The write memory barrier prevents other CPUs from observing the fifo get updated before they observe the updated contents of the header itself. Without the barrier, uninitialized header contents caused the crashes and invalid data. Signed-off-by: Luke Robison <[email protected]> (cherry picked from commit 71f378d)
wenduwan
approved these changes
Feb 15, 2024
bedroge
added a commit
to bedroge/easybuild-easyconfigs
that referenced
this pull request
Feb 20, 2024
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
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Outdated suggestions cannot be applied.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.
Cherry pick #12338 to fix #12270 on v5.0.x