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quagga 1.0.20160315

    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: }