From: Tomas Glozar Date: Thu, 16 Jan 2025 14:49:31 +0000 (+0100) Subject: rtla/timerlat_top: Abort event processing on second signal X-Git-Tag: v6.1.129~90 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8b1d868376e8818ca9da7427be5219b17b68c03f;p=thirdparty%2Fkernel%2Fstable.git rtla/timerlat_top: Abort event processing on second signal [ 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 Cc: Luis Goncalves Cc: Gabriele Monaco Link: https://lore.kernel.org/20250116144931.649593-6-tglozar@redhat.com Signed-off-by: Tomas Glozar Signed-off-by: Steven Rostedt (Google) Signed-off-by: Sasha Levin --- diff --git a/tools/tracing/rtla/src/timerlat_top.c b/tools/tracing/rtla/src/timerlat_top.c index 08e940ecdc966..46c3405a356f5 100644 --- a/tools/tracing/rtla/src/timerlat_top.c +++ b/tools/tracing/rtla/src/timerlat_top.c @@ -578,6 +578,14 @@ static int stop_tracing; static struct trace_instance *top_inst = NULL; 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; if (top_inst) trace_instance_stop(top_inst);