Sumit6307 commented on PR #18607: URL: https://github.com/apache/nuttx/pull/18607#issuecomment-4141560467
@xiaoxiang781216 @jingfei195887 I completely agree with @xiaoxiang781216. The cross-CPU synchronization of hardware counters used by `perf_gettime()` is indeed a challenge for internal kernel timing consistency on some SMP systems. While it might introduce minor jitter if threads migrate between cores during a syscall, the primary goal here is high-level regression detection in the CI (which runs in a controlled environment). The call counts remain 100% accurate, and the timing data still provides a very useful relative indicator for Catching sudden performance drops in the VFS path without the heavy complexity of host-side trace decoding. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
