linux-kernel - [PATCH v2 5/6] perf test: Add timeout to datasym workload

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Message-ID: <20250304022837.1877845-6-namhyung@kernel.org>
Date: Mon,  3 Mar 2025 18:28:36 -0800
From: Namhyung Kim <namhyung@...nel.org>
To: Arnaldo Carvalho de Melo <acme@...nel.org>,
	Ian Rogers <irogers@...gle.com>,
	Kan Liang <kan.liang@...ux.intel.com>
Cc: Jiri Olsa <jolsa@...nel.org>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	linux-perf-users@...r.kernel.org,
	Thomas Richter <tmricht@...ux.ibm.com>,
	Leo Yan <leo.yan@....com>
Subject: [PATCH v2 5/6] perf test: Add timeout to datasym workload

Unlike others it has an infinite loop that make it annoying to call.
Make it finish after 1 second and handle command-line argument to change
the setting.

Cc: Thomas Richter <tmricht@...ux.ibm.com>
Cc: Leo Yan <leo.yan@....com>
Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
 tools/perf/tests/workloads/datasym.c | 23 +++++++++++++++++++++--
 1 file changed, 21 insertions(+), 2 deletions(-)

diff --git a/tools/perf/tests/workloads/datasym.c b/tools/perf/tests/workloads/datasym.c
index 8e08fc75a973e5f7..8ddb2aa6a049e343 100644
--- a/tools/perf/tests/workloads/datasym.c
+++ b/tools/perf/tests/workloads/datasym.c
@@ -1,3 +1,6 @@
+#include <stdlib.h>
+#include <signal.h>
+#include <unistd.h>
 #include <linux/compiler.h>
 #include "../tests.h"
 
@@ -12,9 +15,25 @@ static buf buf1 = {
 	.reserved[0] = 1,
 };
 
-static int datasym(int argc __maybe_unused, const char **argv __maybe_unused)
+static volatile sig_atomic_t done;
+
+static void sighandler(int sig __maybe_unused)
+{
+	done = 1;
+}
+
+static int datasym(int argc, const char **argv)
 {
-	for (;;) {
+	int sec = 1;
+
+	if (argc > 0)
+		sec = atoi(argv[0]);
+
+	signal(SIGINT, sighandler);
+	signal(SIGALRM, sighandler);
+	alarm(sec);
+
+	while (!done) {
 		buf1.data1++;
 		if (buf1.data1 == 123) {
 			/*
-- 
2.48.1.711.g2feabab25a-goog