Bug 207243
| Summary: | `perf stat --timeout` does not return after timeout expires | ||
|---|---|---|---|
| Product: | Tracing/Profiling | Reporter: | Konstantin Kharlamov (hi-angel) |
| Component: | Perf tool | Assignee: | Arnaldo Carvalho de Melo (acme) |
| Status: | ASSIGNED --- | ||
| Severity: | normal | CC: | jolsa |
| Priority: | P1 | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Kernel Version: | 5.6.2 | Subsystem: | |
| Regression: | No | Bisected commit-id: | |
| Attachments: | Fix for 'perf stat --timeout N workload-to-start' | ||
So I reproduced the problem, in my testing only system wide mode is working:
[root@five ~]# perf stat -e cycles --timeout 1000 -a
Performance counter stats for 'system wide':
7,762,164,845 cycles
1.000529516 seconds time elapsed
[root@five ~]# perf stat -e cycles --timeout 150 -a
Performance counter stats for 'system wide':
1,291,118,172 cycles
0.150428442 seconds time elapsed
[root@five ~]#
I'll try to investigate and fix it, thanks for the report.
Created attachment 288499 [details]
Fix for 'perf stat --timeout N workload-to-start'
Wow that was quick! Thank you! :-) Can I take that as a: Tested-by: hi-angel@yandex.ru And add that to the patch, in addition to: Reported-by: hi-angel@yandex.ru And also your name to add there as well if possible? - Arnaldo (In reply to Arnaldo Carvalho de Melo from comment #4) > :-) > > Can I take that as a: > > Tested-by: hi-angel@yandex.ru > > And add that to the patch, in addition to: > > Reported-by: hi-angel@yandex.ru > > And also your name to add there as well if possible? > > - Arnaldo Sounds great, though I gotta need some time. I will test it in a few hours! (In reply to Arnaldo Carvalho de Melo from comment #4) > :-) > > Can I take that as a: > > Tested-by: hi-angel@yandex.ru > > And add that to the patch, in addition to: > > Reported-by: hi-angel@yandex.ru > > And also your name to add there as well if possible? > > - Arnaldo Thank you, I tested it, works for me. I replied on the ML |
Description of `timeout` option for `perf stat` says "Stop the perf stat session and print count deltas after N milliseconds". Unfortunately the session does not stop after the time expires. # Steps to reproduce 1. Run: perf stat --timeout 1000 sleep 1h 2. Wait a second. ## Expected As timeout option is set to 1000ms aka 1 second, a second later the command should return and print statistics. ## Actual Nothing happens.