cntfrq_el0精度问题
Open
- Dominant language
- C++
- Stars
- 197
- Forks
- 32
- PR merge metrics
- No merged PRs in 30d
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
Contributor guide
No contributing guide indexed for this repository
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.
Assessment
- Tech stack
- cpp
- Domain
- performance
- Issue type
- Bug
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 20/100