From: Tomas Glozar tglozar@redhat.com
[ 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@redhat.com Cc: Luis Goncalves lgoncalv@redhat.com Cc: Gabriele Monaco gmonaco@redhat.com Link: https://lore.kernel.org/20250116144931.649593-6-tglozar@redhat.com Signed-off-by: Tomas Glozar tglozar@redhat.com Signed-off-by: Steven Rostedt (Google) rostedt@goodmis.org Signed-off-by: Sasha Levin sashal@kernel.org --- 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 0915092057f85..b0c1c3735173d 100644 --- a/tools/tracing/rtla/src/timerlat_top.c +++ b/tools/tracing/rtla/src/timerlat_top.c @@ -727,6 +727,14 @@ 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; }