1 files changed, 82 insertions, 0 deletions
diff --git a/tools/perf/tests/workloads/thloop.c b/tools/perf/tests/workloads/thloop.c
new file mode 100644
index 000000000000..bd8168f883fb
--- /dev/null
+++ b/tools/perf/tests/workloads/thloop.c
@@ -0,0 +1,82 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#include <pthread.h>
+#include <stdlib.h>
+#include <signal.h>
+#include <unistd.h>
+#include <linux/compiler.h>
+#include "../tests.h"
+
+static volatile sig_atomic_t done;
+
+/* We want to check this symbol in perf report */
+noinline void test_loop(void);
+
+static void sighandler(int sig __maybe_unused)
+{
+	done = 1;
+}
+
+noinline void test_loop(void)
+{
+	while (!done);
+}
+
+static void *thfunc(void *arg)
+{
+	void (*loop_fn)(void) = arg;
+
+	loop_fn();
+	return NULL;
+}
+
+static int thloop(int argc, const char **argv)
+{
+	int nt = 2, sec = 1, err = 1;
+	pthread_t *thread_list = NULL;
+
+	if (argc > 0)
+		sec = atoi(argv[0]);
+
+	if (sec <= 0) {
+		fprintf(stderr, "Error: seconds (%d) must be >= 1\n", sec);
+		return 1;
+	}
+
+	if (argc > 1)
+		nt = atoi(argv[1]);
+
+	if (nt <= 0) {
+		fprintf(stderr, "Error: thread count (%d) must be >= 1\n", nt);
+		return 1;
+	}
+
+	signal(SIGINT, sighandler);
+	signal(SIGALRM, sighandler);
+
+	thread_list = calloc(nt, sizeof(pthread_t));
+	if (thread_list == NULL) {
+		fprintf(stderr, "Error: malloc failed for %d threads\n", nt);
+		goto out;
+	}
+	for (int i = 1; i < nt; i++) {
+		int ret = pthread_create(&thread_list[i], NULL, thfunc, test_loop);
+
+		if (ret) {
+			fprintf(stderr, "Error: failed to create thread %d\n", i);
+			done = 1; // Ensure started threads terminate.
+			goto out;
+		}
+	}
+	alarm(sec);
+	test_loop();
+	err = 0;
+out:
+	for (int i = 1; i < nt; i++) {
+		if (thread_list && thread_list[i])
+			pthread_join(thread_list[i], /*retval=*/NULL);
+	}
+	free(thread_list);
+	return err;
+}
+
+DEFINE_WORKLOAD(thloop);