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#include <stdio.h>
26#include <unistd.h>
27
28#include <zebra.h>
29
30#include "thread.h"
31#include "pqueue.h"
32#include "prng.h"
33
34#define SCHEDULE_TIMERS 1000000
35#define REMOVE_TIMERS    500000
36
37struct thread_master *master;
38
39static int dummy_func(struct thread *thread)
40{
41  return 0;
42}
43
44int main(int argc, char **argv)
45{
46  struct prng *prng;
47  int i;
48  struct thread **timers;
49  struct timeval tv_start, tv_lap, tv_stop;
50  unsigned long t_schedule, t_remove;
51
52  master = thread_master_create();
53  prng = prng_new(0);
54  timers = calloc(SCHEDULE_TIMERS, sizeof(*timers));
55
56  /* create thread structures so they won't be allocated during the
57   * time measurement */
58  for (i = 0; i < SCHEDULE_TIMERS; i++)
59    timers[i] = thread_add_timer_msec(master, dummy_func, NULL, 0);
60  for (i = 0; i < SCHEDULE_TIMERS; i++)
61    thread_cancel(timers[i]);
62
63  quagga_gettime(QUAGGA_CLK_MONOTONIC, &tv_start);
64
65  for (i = 0; i < SCHEDULE_TIMERS; i++)
66    {
67      long interval_msec;
68
69      interval_msec = prng_rand(prng) % (100 * SCHEDULE_TIMERS);
70      timers[i] = thread_add_timer_msec(master, dummy_func,
71                                        NULL, interval_msec);
72    }
73
74  quagga_gettime(QUAGGA_CLK_MONOTONIC, &tv_lap);
75
76  for (i = 0; i < REMOVE_TIMERS; i++)
77    {
78      int index;
79
80      index = prng_rand(prng) % SCHEDULE_TIMERS;
81      if (timers[index])
82        thread_cancel(timers[index]);
83      timers[index] = NULL;
84    }
85
86  quagga_gettime(QUAGGA_CLK_MONOTONIC, &tv_stop);
87
88  t_schedule = 1000 * (tv_lap.tv_sec - tv_start.tv_sec);
89  t_schedule += (tv_lap.tv_usec - tv_start.tv_usec) / 1000;
90
91  t_remove = 1000 * (tv_stop.tv_sec - tv_lap.tv_sec);
92  t_remove += (tv_stop.tv_usec - tv_lap.tv_usec) / 1000;
93
94  printf("Scheduling %d random timers took %ld.%03ld seconds.\n",
95         SCHEDULE_TIMERS, t_schedule/1000, t_schedule%1000);
96  printf("Removing %d random timers took %ld.%03ld seconds.\n",
97         REMOVE_TIMERS, t_remove/1000, t_remove%1000);
98  fflush(stdout);
99
100  free(timers);
101  thread_master_free(master);
102  prng_free(prng);
103  return 0;
104}
105