LIVELOCK: Implement progress transition #159
Draft
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 implements the progress transition as a bookkeeping mechanism to detect long per-thread executions that do not make progress, indicating a livelock-like situation. A per-thread no-progress counter is incremented for every transition. Whenever the target executes MC_PROGRESS(), the counter for the corresponding thread is reset. If at the end of execution, the no-progress counter for any thread exceeds a configurable threshold, the trace is then checked for cycles. A potential livelock is reported only when both conditions hold: no-progress and repetition.
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
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Outdated suggestions cannot be applied.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 implements the progress transition as a bookkeeping mechanism to detect long per-thread executions that do not make progress, indicating a livelock-like situation.
A per-thread no-progress counter is incremented for every transition. Whenever the target executes MC_PROGRESS(), the counter for the corresponding thread is reset. If at the end of execution, the no-progress counter for any thread exceeds a configurable threshold, the trace is then checked for cycles. A potential livelock is reported only when both conditions hold: no-progress and repetition.