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| author | Tomas Glozar <[email protected]> | 2025-01-16 14:49:29 +0000 |
|---|---|---|
| committer | Steven Rostedt (Google) <[email protected]> | 2025-01-24 18:45:23 +0000 |
| commit | a4dfce7559d75430c464294ddee554be2a413c4a (patch) | |
| tree | 5de203fa22c5be7a337b7cb1e577fc522d829ab0 /mm/debug.c | |
| parent | rtla/timerlat_hist: Stop timerlat tracer on signal (diff) | |
| download | kernel-a4dfce7559d75430c464294ddee554be2a413c4a.tar.gz kernel-a4dfce7559d75430c464294ddee554be2a413c4a.zip | |
rtla/timerlat_top: Stop timerlat tracer on signal
Currently, when either SIGINT from the user or SIGALRM from the duration
timer is caught by rtla-timerlat, stop_tracing is set to break out of
the main loop. This is not sufficient for cases where the timerlat
tracer is producing more data than rtla can consume, since in that case,
rtla is looping indefinitely inside tracefs_iterate_raw_events, never
reaches the check of stop_tracing and hangs.
In addition to setting stop_tracing, also stop the timerlat tracer on
received signal (SIGINT or SIGALRM). This will stop new samples so that
the existing samples may be processed and tracefs_iterate_raw_events
eventually exits.
Cc: [email protected]
Cc: John Kacur <[email protected]>
Cc: Luis Goncalves <[email protected]>
Cc: Gabriele Monaco <[email protected]>
Link: https://lore.kernel.org/[email protected]
Fixes: a828cd18bc4a ("rtla: Add timerlat tool and timelart top mode")
Signed-off-by: Tomas Glozar <[email protected]>
Signed-off-by: Steven Rostedt (Google) <[email protected]>
Diffstat (limited to 'mm/debug.c')
0 files changed, 0 insertions, 0 deletions