CPUID-triggered rcb undercounts are not reliably handled
Open
Nobody has claimed this yet.
- Dominant language
- C++
- Stars
- 10.7k
- Forks
- 662
- Avg merge
- 2d 3h
- Merged PRs (30d)
- 2
Description
... and then replay diverges :/. I've never seen this warning printed on my Ivy Bridge machine before, and IIRC this was a Haswell bug.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reproducing the CPUID-triggered rcb undercount and replay divergence described in the issue, comparing behavior on Ivy Bridge and Haswell. Locate rr's CPUID handling and rcb accounting, then use the replay result and warning behavior as the completion criteria; the issue does not name specific files or tests.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- cpp
- Domain
- devtools, reverse-engineering
- Issue type
- Bug
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 20/100