lkml.org 
[lkml]   [2023]   [Mar]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
Subject[BUG] perf: No samples found when using kcore + coresight
Hi,

I'm seeking some help regarding perf record --kcore + coresight. When
I tracing with perf record --kcore -e cs_etm ... , perf report shows
"The perf.data/data data has no samples!".

I tried other combinations:
1. perf record --kcore (w/o using coresight): works
2. perf record -e cs_etm ... : works
3. Manually copy kcore with perf buildid-cache, then run perf record
-e cs_etm... : works

So just "perf record --kcore -e cs_etm ..." doesn't work.

I'm using v6.2 kernel and the perf is built from the same kernel
source with OpenCSD 1.4. Also attached the sample file generated by
perf.

Any suggestion is appreciated.

Thanks,
Yang
[unhandled content-type:application/octet-stream]
\
 
 \ /
  Last update: 2023-03-27 00:46    [W:1.150 / U:0.540 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site