From: Tomas Glozar Date: Thu, 16 Jan 2025 14:49:30 +0000 (+0100) Subject: rtla/timerlat_hist: Abort event processing on second signal X-Git-Tag: v6.14-rc1~83^2~9 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=d6899e560366e10141189697502bc5521940c588;p=thirdparty%2Fkernel%2Flinux.git 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 Cc: Luis Goncalves Cc: Gabriele Monaco Link: https://lore.kernel.org/20250116144931.649593-5-tglozar@redhat.com Signed-off-by: Tomas Glozar Signed-off-by: Steven Rostedt (Google) --- diff --git a/tools/tracing/rtla/src/timerlat_hist.c b/tools/tracing/rtla/src/timerlat_hist.c index f1edf1c8a7b07..53ded187b33a3 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);