From: Tomas Glozar <tglozar@xxxxxxxxxx> [ Upstream commit 80967b354a76b360943af384c10d807d98bea5c4 ] 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/20250116144931.649593-6-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_top.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/tools/tracing/rtla/src/timerlat_top.c b/tools/tracing/rtla/src/timerlat_top.c index 8fc0f6aa19dad..ee4400aac285a 100644 --- a/tools/tracing/rtla/src/timerlat_top.c +++ b/tools/tracing/rtla/src/timerlat_top.c @@ -577,6 +577,14 @@ static struct osnoise_tool static int stop_tracing; static void stop_top(int sig) { + if (stop_tracing) { + /* + * Stop requested twice in a row; abort event processing and + * exit immediately + */ + tracefs_iterate_stop(top_inst->inst); + return; + } stop_tracing = 1; } -- 2.39.5
