cntfrq_el0精度问题
Nobody has claimed this yet.
Assessment
- Difficulty
- 5/5
- Estimated time
- Over a week
- Newbie friendliness
- 20/100
- Issue type
- Bug
- Clarity
- Needs clarification
- Activity status
- Stale
- Tech stack
- cpp
- Domain
- performance
Research direction
Start by reviewing how mperf accesses or measures cntfrq_el0 and PMCCNTR_EL0. The issue asks whether cntfrq_el0 provides cycle-level precision and whether PMCCNTR_EL0 requires kernel-side enablement or root access; the expected behavior and any code location are not specified.
Written by the indexing model from the issue text.
Description
咨询一下，cntfrq_el0的精度是不是达不到cycle的级别，想要达到cycle的级别还得用PMCCNTR_EL0
但是PMCCNTR_EL0需要root权限才行是吧？好像需要先在内核态使能才行
- Dominant language
- C++
- Stars
- 197
- Forks
- 32
- PR merge metrics
- No merged PRs in 30d
Contributor guide
No contributing guide indexed for this repository
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.
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