From: Tomas Glozar <tglozar@xxxxxxxxxx> [ Upstream commit d6899e560366e10141189697502bc5521940c588 ] 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@xxxxxxxxxx> Cc: Luis Goncalves <lgoncalv@xxxxxxxxxx> Cc: Gabriele Monaco <gmonaco@xxxxxxxxxx> Link: https://lore.kernel.org/20250116144931.649593-5-tglozar@xxxxxxxxxx Signed-off-by: Tomas Glozar <tglozar@xxxxxxxxxx> Signed-off-by: Steven Rostedt (Google) <rostedt@xxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- tools/tracing/rtla/src/timerlat_hist.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/tools/tracing/rtla/src/timerlat_hist.c b/tools/tracing/rtla/src/timerlat_hist.c index 4403cc4eba302..b784f32a1f4f0 100644 --- a/tools/tracing/rtla/src/timerlat_hist.c +++ b/tools/tracing/rtla/src/timerlat_hist.c @@ -1148,6 +1148,14 @@ static struct osnoise_tool static int stop_tracing; 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; } -- 2.39.5
