[flang][runtime] Further work on speeding up work queue operations#149189
Merged
[flang][runtime] Further work on speeding up work queue operations#149189
Conversation
This patch avoids a trip through the work queue engine for cases on a CPU where finalization and destruction actions during assignment were handled without enqueueing another task.
akuhlens
reviewed
Jul 16, 2025
| if (mustDeallocateLHS) { | ||
| // Convert the LHS into a temporary, then make it look deallocated. | ||
| toDeallocate_ = &tempDescriptor_.descriptor(); | ||
| persist_ = true; // tempDescriptor_ state must outlive child tickets |
Contributor
There was a problem hiding this comment.
The general idea here is that by delaying conditionally setting persist, we can avoid persisting the allocation under some conditions and avoid the overhead of a trip through the work queue in those cases, correct?
Contributor
Author
There was a problem hiding this comment.
Actually, it was being set unconditionally, so it would be true even when the child task was run immediately as BeginDestroy or whatever, and that caused a later no-op suspension and resumption.
eugeneepshteyn
approved these changes
Jul 17, 2025
This was referenced Jul 23, 2025
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Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be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.
This patch avoids a trip through the work queue engine for cases on a CPU where finalization and destruction actions during assignment were handled without enqueueing another task.