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Import Niels Provos bench.c, this version from http://libev.schmorp.de/bench.c
Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
This commit is contained in:
Joachim Nilsson
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/*
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* Copyright 2003 Niels Provos <provos@citi.umich.edu>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*
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* Mon 03/10/2003 - Modified by Davide Libenzi <davidel@xmailserver.org>
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*
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* Added chain event propagation to improve the sensitivity of
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* the measure respect to the event loop efficency.
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*
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*
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*/
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#define timersub(tvp, uvp, vvp) \
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do { \
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(vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec; \
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(vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec; \
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if ((vvp)->tv_usec < 0) { \
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(vvp)->tv_sec--; \
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(vvp)->tv_usec += 1000000; \
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} \
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} while (0)
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/time.h>
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#include <sys/socket.h>
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#include <sys/signal.h>
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#include <sys/resource.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <errno.h>
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#if NATIVE
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# include "ev.h"
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#endif
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#include <event.h>
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static int count, writes, fired;
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static int *pipes;
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static int num_pipes, num_active, num_writes;
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static struct event *events;
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static int timers, native;
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static struct ev_io *evio;
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static struct ev_timer *evto;
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void
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read_cb(int fd, short which, void *arg)
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{
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int idx = (int) arg, widx = idx + 1;
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u_char ch;
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if (timers)
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{
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if (native)
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{
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#if NATIVE
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evto [idx].repeat = 10. + drand48 ();
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ev_timer_again (&evto [idx]);
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#else
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abort ();
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#endif
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}
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else
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{
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struct timeval tv;
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event_del (&events [idx]);
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tv.tv_sec = 10;
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tv.tv_usec = drand48() * 1e6;
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event_add(&events[idx], &tv);
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}
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}
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count += read(fd, &ch, sizeof(ch));
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if (writes) {
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if (widx >= num_pipes)
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widx -= num_pipes;
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write(pipes[2 * widx + 1], "e", 1);
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writes--;
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fired++;
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}
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}
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#if NATIVE
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void
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read_thunk(struct ev_io *w, int revents)
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{
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read_cb (w->fd, revents, w->data);
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}
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void
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timer_cb (struct ev_timer *w, int revents)
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{
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/* nop */
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}
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#endif
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struct timeval *
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run_once(void)
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{
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int *cp, i, space;
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static struct timeval ta, ts, te, tv;
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gettimeofday(&ta, NULL);
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for (cp = pipes, i = 0; i < num_pipes; i++, cp += 2) {
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if (native)
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{
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#if NATIVE
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if (ev_is_active (&evio [i]))
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ev_io_stop (&evio [i]);
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ev_io_set (&evio [i], cp [0], EV_READ);
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ev_io_start (&evio [i]);
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evto [i].repeat = 10. + drand48 ();
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ev_timer_again (&evto [i]);
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#else
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abort ();
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#endif
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}
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else
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{
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event_del(&events[i]);
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event_set(&events[i], cp[0], EV_READ | EV_PERSIST, read_cb, (void *) i);
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tv.tv_sec = 10.;
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tv.tv_usec = drand48() * 1e6;
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event_add(&events[i], timers ? &tv : 0);
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}
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}
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event_loop(EVLOOP_ONCE | EVLOOP_NONBLOCK);
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fired = 0;
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space = num_pipes / num_active;
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space = space * 2;
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for (i = 0; i < num_active; i++, fired++)
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write(pipes[i * space + 1], "e", 1);
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count = 0;
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writes = num_writes;
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{ int xcount = 0;
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gettimeofday(&ts, NULL);
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do {
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event_loop(EVLOOP_ONCE | EVLOOP_NONBLOCK);
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xcount++;
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} while (count != fired);
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gettimeofday(&te, NULL);
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//if (xcount != count) fprintf(stderr, "Xcount: %d, Rcount: %d\n", xcount, count);
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}
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timersub(&te, &ta, &ta);
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timersub(&te, &ts, &ts);
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fprintf(stdout, "%8ld %8ld\n",
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ta.tv_sec * 1000000L + ta.tv_usec,
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ts.tv_sec * 1000000L + ts.tv_usec
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);
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return (&te);
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}
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int
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main (int argc, char **argv)
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{
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struct rlimit rl;
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int i, c;
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struct timeval *tv;
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int *cp;
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extern char *optarg;
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num_pipes = 100;
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num_active = 1;
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num_writes = num_pipes;
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while ((c = getopt(argc, argv, "n:a:w:te")) != -1) {
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switch (c) {
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case 'n':
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num_pipes = atoi(optarg);
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break;
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case 'a':
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num_active = atoi(optarg);
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break;
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case 'w':
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num_writes = atoi(optarg);
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break;
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case 'e':
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native = 1;
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break;
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case 't':
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timers = 1;
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break;
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default:
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fprintf(stderr, "Illegal argument \"%c\"\n", c);
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exit(1);
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}
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}
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#if 1
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rl.rlim_cur = rl.rlim_max = num_pipes * 2 + 50;
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if (setrlimit(RLIMIT_NOFILE, &rl) == -1) {
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perror("setrlimit");
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}
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#endif
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#if NATIVE
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evio = calloc(num_pipes, sizeof(struct ev_io));
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evto = calloc(num_pipes, sizeof(struct ev_timer));
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#endif
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events = calloc(num_pipes, sizeof(struct event));
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pipes = calloc(num_pipes * 2, sizeof(int));
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if (events == NULL || pipes == NULL) {
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perror("malloc");
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exit(1);
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}
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event_init();
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for (cp = pipes, i = 0; i < num_pipes; i++, cp += 2) {
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#if NATIVE
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if (native) {
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ev_init (&evto [i], timer_cb);
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ev_init (&evio [i], read_thunk);
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evio [i].data = (void *)i;
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}
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#endif
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#ifdef USE_PIPES
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if (pipe(cp) == -1) {
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#else
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if (socketpair(AF_UNIX, SOCK_STREAM, 0, cp) == -1) {
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#endif
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perror("pipe");
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exit(1);
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}
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}
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for (i = 0; i < 2; i++) {
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tv = run_once();
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}
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exit(0);
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}
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