Add DLAF_WITH_MPI_GPU_AWARE_NO_REDUCE_OPS and adapt spack variant#1354
Open
Add DLAF_WITH_MPI_GPU_AWARE_NO_REDUCE_OPS and adapt spack variant#1354
Conversation
Collaborator
Author
|
cscs-ci run |
msimberg
reviewed
Jan 30, 2026
albestro
reviewed
Jan 30, 2026
Collaborator
There was a problem hiding this comment.
Just a possible alternative idea
Collaborator
Author
|
cscs-ci run |
msimberg
reviewed
Feb 3, 2026
Collaborator
Author
|
cscs-ci run |
rasolca
force-pushed
the
rasolca/openmpi
branch
from
3967727 to
fee3486
Compare
Collaborator
Author
|
cscs-ci run |
msimberg
approved these changes
Mar 19, 2026
Collaborator
msimberg
left a comment
msimberg
left a comment
There was a problem hiding this comment.
Looks good to me, thanks @rasolca.
@albestro's also looks like a nice idea (https://github.com/eth-cscs/DLA-Future/pull/1354/changes#r2747356273), but I think it can be left like this as well.
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
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
3 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Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be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.
OPENMPI doesn't support GPU direct reduce operations.
Added a flag to force
reduceandallreduceto use CPU memory and adapted thempi_gpu_awarespack variant to allow full GPU aware communication or limited GPU aware communication.