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// 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;
}
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