1 files changed, 86 insertions, 0 deletions
diff --git a/tests/lib/test_timer_performance.c b/tests/lib/test_timer_performance.c
new file mode 100644
index 0000000..3ace076
--- /dev/null
+++ b/tests/lib/test_timer_performance.c
@@ -0,0 +1,86 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Test program which measures the time it takes to schedule and
+ * remove timers.
+ *
+ * Copyright (C) 2013 by Open Source Routing.
+ * Copyright (C) 2013 by Internet Systems Consortium, Inc. ("ISC")
+ *
+ * This file is part of Quagga
+ */
+
+#include <zebra.h>
+
+#include <stdio.h>
+#include <unistd.h>
+
+#include "frrevent.h"
+#include "prng.h"
+
+#define SCHEDULE_TIMERS 1000000
+#define REMOVE_TIMERS    500000
+
+struct event_loop *master;
+
+static void dummy_func(struct event *thread)
+{
+}
+
+int main(int argc, char **argv)
+{
+	struct prng *prng;
+	int i;
+	struct event **timers;
+	struct timeval tv_start, tv_lap, tv_stop;
+	unsigned long t_schedule, t_remove;
+
+	master = event_master_create(NULL);
+	prng = prng_new(0);
+	timers = calloc(SCHEDULE_TIMERS, sizeof(*timers));
+
+	/* create thread structures so they won't be allocated during the
+	 * time measurement */
+	for (i = 0; i < SCHEDULE_TIMERS; i++) {
+		event_add_timer_msec(master, dummy_func, NULL, 0, &timers[i]);
+	}
+	for (i = 0; i < SCHEDULE_TIMERS; i++)
+		event_cancel(&timers[i]);
+
+	monotime(&tv_start);
+
+	for (i = 0; i < SCHEDULE_TIMERS; i++) {
+		long interval_msec;
+
+		interval_msec = prng_rand(prng) % (100 * SCHEDULE_TIMERS);
+		event_add_timer_msec(master, dummy_func, NULL, interval_msec,
+				     &timers[i]);
+	}
+
+	monotime(&tv_lap);
+
+	for (i = 0; i < REMOVE_TIMERS; i++) {
+		int index;
+
+		index = prng_rand(prng) % SCHEDULE_TIMERS;
+		event_cancel(&timers[index]);
+	}
+
+	monotime(&tv_stop);
+
+	t_schedule = 1000 * (tv_lap.tv_sec - tv_start.tv_sec);
+	t_schedule += (tv_lap.tv_usec - tv_start.tv_usec) / 1000;
+
+	t_remove = 1000 * (tv_stop.tv_sec - tv_lap.tv_sec);
+	t_remove += (tv_stop.tv_usec - tv_lap.tv_usec) / 1000;
+
+	printf("Scheduling %d random timers took %lu.%03lu seconds.\n",
+	       SCHEDULE_TIMERS, t_schedule / 1000, t_schedule % 1000);
+	printf("Removing %d random timers took %lu.%03lu seconds.\n",
+	       REMOVE_TIMERS, t_remove / 1000, t_remove % 1000);
+	fflush(stdout);
+
+	free(timers);
+	event_master_free(master);
+	prng_free(prng);
+	return 0;
+}