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Annotation of embedaddon/quagga/tests/test-timer-performance.c, revision 1.1.1.1

1.1       misho       1: /*
                      2:  * Test program which measures the time it takes to schedule and
                      3:  * remove timers.
                      4:  *
                      5:  * Copyright (C) 2013 by Open Source Routing.
                      6:  * Copyright (C) 2013 by Internet Systems Consortium, Inc. ("ISC")
                      7:  *
                      8:  * This file is part of Quagga
                      9:  *
                     10:  * Quagga is free software; you can redistribute it and/or modify it
                     11:  * under the terms of the GNU General Public License as published by the
                     12:  * Free Software Foundation; either version 2, or (at your option) any
                     13:  * later version.
                     14:  *
                     15:  * Quagga is distributed in the hope that it will be useful, but
                     16:  * WITHOUT ANY WARRANTY; without even the implied warranty of
                     17:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
                     18:  * General Public License for more details.
                     19:  *
                     20:  * You should have received a copy of the GNU General Public License
                     21:  * along with Quagga; see the file COPYING.  If not, write to the Free
                     22:  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
                     23:  * 02111-1307, USA.
                     24:  */
                     25: 
                     26: #include <zebra.h>
                     27: 
                     28: #include <stdio.h>
                     29: #include <unistd.h>
                     30: 
                     31: #include "thread.h"
                     32: #include "pqueue.h"
                     33: #include "prng.h"
                     34: 
                     35: #define SCHEDULE_TIMERS 1000000
                     36: #define REMOVE_TIMERS    500000
                     37: 
                     38: struct thread_master *master;
                     39: 
                     40: static int dummy_func(struct thread *thread)
                     41: {
                     42:   return 0;
                     43: }
                     44: 
                     45: int main(int argc, char **argv)
                     46: {
                     47:   struct prng *prng;
                     48:   int i;
                     49:   struct thread **timers;
                     50:   struct timeval tv_start, tv_lap, tv_stop;
                     51:   unsigned long t_schedule, t_remove;
                     52: 
                     53:   master = thread_master_create();
                     54:   prng = prng_new(0);
                     55:   timers = calloc(SCHEDULE_TIMERS, sizeof(*timers));
                     56: 
                     57:   /* create thread structures so they won't be allocated during the
                     58:    * time measurement */
                     59:   for (i = 0; i < SCHEDULE_TIMERS; i++)
                     60:     timers[i] = thread_add_timer_msec(master, dummy_func, NULL, 0);
                     61:   for (i = 0; i < SCHEDULE_TIMERS; i++)
                     62:     thread_cancel(timers[i]);
                     63: 
                     64:   quagga_gettime(QUAGGA_CLK_MONOTONIC, &tv_start);
                     65: 
                     66:   for (i = 0; i < SCHEDULE_TIMERS; i++)
                     67:     {
                     68:       long interval_msec;
                     69: 
                     70:       interval_msec = prng_rand(prng) % (100 * SCHEDULE_TIMERS);
                     71:       timers[i] = thread_add_timer_msec(master, dummy_func,
                     72:                                         NULL, interval_msec);
                     73:     }
                     74: 
                     75:   quagga_gettime(QUAGGA_CLK_MONOTONIC, &tv_lap);
                     76: 
                     77:   for (i = 0; i < REMOVE_TIMERS; i++)
                     78:     {
                     79:       int index;
                     80: 
                     81:       index = prng_rand(prng) % SCHEDULE_TIMERS;
                     82:       if (timers[index])
                     83:         thread_cancel(timers[index]);
                     84:       timers[index] = NULL;
                     85:     }
                     86: 
                     87:   quagga_gettime(QUAGGA_CLK_MONOTONIC, &tv_stop);
                     88: 
                     89:   t_schedule = 1000 * (tv_lap.tv_sec - tv_start.tv_sec);
                     90:   t_schedule += (tv_lap.tv_usec - tv_start.tv_usec) / 1000;
                     91: 
                     92:   t_remove = 1000 * (tv_stop.tv_sec - tv_lap.tv_sec);
                     93:   t_remove += (tv_stop.tv_usec - tv_lap.tv_usec) / 1000;
                     94: 
                     95:   printf("Scheduling %d random timers took %ld.%03ld seconds.\n",
                     96:          SCHEDULE_TIMERS, t_schedule/1000, t_schedule%1000);
                     97:   printf("Removing %d random timers took %ld.%03ld seconds.\n",
                     98:          REMOVE_TIMERS, t_remove/1000, t_remove%1000);
                     99:   fflush(stdout);
                    100: 
                    101:   free(timers);
                    102:   thread_master_free(master);
                    103:   prng_free(prng);
                    104:   return 0;
                    105: }