diff options
| author |   Tomas Glozar <tglozar@redhat.com> | 2025-01-16 15:49:30 +0100 |
|---|---|---|
| committer |   Steven Rostedt (Google) <rostedt@goodmis.org> | 2025-01-24 13:45:31 -0500 |
| commit | d6899e560366e10141189697502bc5521940c588 (patch) | |
| tree | e3383b5e12e83143a06c938aa2b604675ae95e16 | |
| parent | rtla/timerlat_top: Stop timerlat tracer on signal (diff) | |
| download | wireguard-linux-d6899e560366e10141189697502bc5521940c588.tar.xz wireguard-linux-d6899e560366e10141189697502bc5521940c588.zip | |
rtla/timerlat_hist: Abort event processing on second signal
If either SIGINT is received twice, or after a SIGALRM (that is, after
timerlat was supposed to stop), abort processing events currently left
in the tracefs buffer and exit immediately.
This allows the user to exit rtla without waiting for processing all
events, should that take longer than wanted, at the cost of not
processing all samples.
Cc: John Kacur <jkacur@redhat.com>
Cc: Luis Goncalves <lgoncalv@redhat.com>
Cc: Gabriele Monaco <gmonaco@redhat.com>
Link: https://lore.kernel.org/20250116144931.649593-5-tglozar@redhat.com
Signed-off-by: Tomas Glozar <tglozar@redhat.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
| -rw-r--r-- | tools/tracing/rtla/src/timerlat_hist.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/tools/tracing/rtla/src/timerlat_hist.c b/tools/tracing/rtla/src/timerlat_hist.c index f1edf1c8a7b0..53ded187b33a 100644 --- a/tools/tracing/rtla/src/timerlat_hist.c +++ b/tools/tracing/rtla/src/timerlat_hist.c @@ -1134,6 +1134,14 @@ static int stop_tracing; static struct trace_instance *hist_inst = NULL; static void stop_hist(int sig) { + if (stop_tracing) { + /* + * Stop requested twice in a row; abort event processing and + * exit immediately + */ + tracefs_iterate_stop(hist_inst->inst); + return; + } stop_tracing = 1; if (hist_inst) trace_instance_stop(hist_inst); |