On 24/01/2023 20:09, Yabin Cui wrote:

Ping for review. And I still can't reproduce it, even if I reduced the timeout to 2us and tried different workloads. Any suggestions for how to reproduce it?

Hi Yabin,

I just found this in my kernel log files from a few days ago.

Jan 19 15:03:35 n1-sdp kernel: [865337.521413] coresight tmc_etr0: timeout while waiting for completion of Manual Flush Jan 19 15:03:35 n1-sdp kernel: [865337.529351] coresight tmc_etr0: timeout while waiting for TMC to be Ready

This is on N1SDP, and I've only been running "normal" perf commands like:

perf record -e cs_etm//k -- taskset -c 2 sleep 1 perf record -e cs_etm// -- stress -c 2 -t 1

I also haven't been able to reproduce it since

James