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