| /* |
| * (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 <unistd.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 20000 |
| |
| 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 |
| } |