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/*
* (C) 2008 by Holger Hans Peter Freyther <zecke@selfish.org>
* (C) 2011 by Harald Welte <laforge@gnumonks.org>
* All Rights Reserved
*
* Authors: Holger Hans Peter Freyther <zecke@selfish.org>
* Pablo Neira Ayuso <pablo@gnumonks.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <getopt.h>
#include <osmocom/core/talloc.h>
#include <osmocom/core/timer.h>
#include <osmocom/core/select.h>
#include <osmocom/core/linuxlist.h>
#include "../../config.h"
static void main_timer_fired(void *data);
static void secondary_timer_fired(void *data);
static unsigned int main_timer_step = 0;
static struct osmo_timer_list main_timer = {
.cb = main_timer_fired,
.data = &main_timer_step,
};
static LLIST_HEAD(timer_test_list);
struct test_timer {
struct llist_head head;
struct osmo_timer_list timer;
struct timeval start;
struct timeval stop;
};
/* number of test steps. We add fact(steps) timers in the whole test. */
#define MAIN_TIMER_NSTEPS 16
/* time between two steps, in secs. */
#define TIME_BETWEEN_STEPS 1
/* timer imprecision that we accept for this test: 10 milliseconds. */
#define TIMER_PRES_SECS 0
#define TIMER_PRES_USECS 10000
static int timer_nsteps = MAIN_TIMER_NSTEPS;
static unsigned int expired_timers = 0;
static unsigned int total_timers = 0;
static unsigned int too_late = 0;
static void main_timer_fired(void *data)
{
unsigned int *step = data;
unsigned int add_in_this_step;
int i;
if (*step == timer_nsteps) {
fprintf(stderr, "Main timer has finished, please, "
"wait a bit for the final report.\n");
return;
}
/* add 2^step pair of timers per step. */
add_in_this_step = (1 << *step);
for (i=0; i<add_in_this_step; i++) {
struct test_timer *v;
v = talloc_zero(NULL, struct test_timer);
if (v == NULL) {
fprintf(stderr, "timer_test: OOM!\n");
return;
}
gettimeofday(&v->start, NULL);
v->timer.cb = secondary_timer_fired;
v->timer.data = v;
unsigned int seconds = (random() % 10) + 1;
v->stop.tv_sec = v->start.tv_sec + seconds;
osmo_timer_schedule(&v->timer, seconds, 0);
llist_add(&v->head, &timer_test_list);
}
fprintf(stderr, "added %d timers in step %u (expired=%u)\n",
add_in_this_step, *step, expired_timers);
total_timers += add_in_this_step;
osmo_timer_schedule(&main_timer, TIME_BETWEEN_STEPS, 0);
(*step)++;
}
static void secondary_timer_fired(void *data)
{
struct test_timer *v = data, *this, *tmp;
struct timeval current, res, precision = { 1, 0 };
gettimeofday(¤t, NULL);
timersub(¤t, &v->stop, &res);
if (timercmp(&res, &precision, >)) {
fprintf(stderr, "ERROR: timer %p has expired too late!\n",
v->timer);
too_late++;
}
llist_del(&v->head);
talloc_free(data);
expired_timers++;
if (expired_timers == total_timers) {
fprintf(stdout, "test over: added=%u expired=%u too_late=%u \n",
total_timers, expired_timers, too_late);
exit(EXIT_SUCCESS);
}
/* randomly (10%) deletion of timers. */
llist_for_each_entry_safe(this, tmp, &timer_test_list, head) {
if ((random() % 100) < 10) {
osmo_timer_del(&this->timer);
llist_del(&this->head);
talloc_free(this);
expired_timers++;
}
}
}
static void alarm_handler(int signum)
{
fprintf(stderr, "ERROR: We took too long to run the timer test, "
"something seems broken, aborting.\n");
exit(EXIT_FAILURE);
}
int main(int argc, char *argv[])
{
int c;
if (signal(SIGALRM, alarm_handler) == SIG_ERR) {
perror("cannot register signal handler");
exit(EXIT_FAILURE);
}
while ((c = getopt_long(argc, argv, "s:", NULL, NULL)) != -1) {
switch(c) {
case 's':
timer_nsteps = atoi(optarg);
if (timer_nsteps <= 0) {
fprintf(stderr, "%s: steps must be > 0\n",
argv[0]);
exit(EXIT_FAILURE);
}
break;
default:
exit(EXIT_FAILURE);
}
}
fprintf(stdout, "Running timer test for %u steps, accepting "
"imprecision of %u.%.6u seconds\n",
timer_nsteps, TIMER_PRES_SECS, TIMER_PRES_USECS);
osmo_timer_schedule(&main_timer, 1, 0);
/* if the test takes too long, we may consider that the timer scheduler
* has hung. We set some maximum wait time which is the double of the
* maximum timeout randomly set (10 seconds, worst case) plus the
* number of steps (since some of them are reset each step). */
alarm(2 * (10 + timer_nsteps));
#ifdef HAVE_SYS_SELECT_H
while (1) {
osmo_select_main(0);
}
#else
fprintf(stdout, "Select not supported on this platform!\n");
#endif
}
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