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simple bench mark

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svn:r57
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Niels Provos 2003-03-10 04:56:41 +00:00
parent 34d794b293
commit ebb73c0db8
1 changed files with 157 additions and 0 deletions
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/*
* Copyright 2003 Niels Provos <provos@citi.umich.edu>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Niels Provos.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <sys/signal.h>
#include <sys/resource.h>
#include <fcntl.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <event.h>
static int count;
void
read_cb(int fd, short which, void *arg)
{
struct event *ev = arg;
u_char ch;
count += read(fd, &ch, sizeof(ch));
}
struct timeval *
run_once(struct event *events, int *pipes, int num_pipes, int num_active)
{
int *cp, i, space;
static struct timeval ts, te;
for (cp = pipes, i = 0; i < num_pipes; i++, cp += 2) {
event_del(&events[i]);
event_set(&events[i], cp[0], EV_READ, read_cb, &events[i]);
event_add(&events[i], NULL);
}
event_loop(EVLOOP_ONCE|EVLOOP_NONBLOCK);
space = num_pipes/num_active;
space = space * 2;
for (i = 0; i < num_active; i++)
write(pipes[i * space + 1], "e", 1);
count = 0;
gettimeofday(&ts, NULL);
event_loop(EVLOOP_ONCE);
gettimeofday(&te, NULL);
timersub(&te, &ts, &te);
if (count != num_active) {
fprintf(stderr, "Fired only %d of %d\n", count, num_active);
return (NULL);
}
return (&te);
}
int
main (int argc, char **argv)
{
struct rlimit rl;
int num_pipes, num_active, i;
struct event *events;
struct timeval *tv;
int *pipes, *cp;
extern char *optarg;
int c;
num_pipes = 100;
num_active = 1;
while ((c = getopt(argc, argv, "n:a:")) != -1) {
switch (c) {
case 'n':
num_pipes = atoi(optarg);
break;
case 'a':
num_active = atoi(optarg);
break;
default:
fprintf(stderr, "Illegal argument \"%c\"\n", c);
exit(1);
}
}
rl.rlim_cur = rl.rlim_max = num_pipes * 2 + 50;
if (setrlimit(RLIMIT_NOFILE, &rl) == -1) {
perror("setrlimit");
exit(1);
}
events = calloc(num_pipes, sizeof(struct event));
pipes = calloc(num_pipes * 2, sizeof(int));
if (events == NULL || pipe == NULL) {
perror("malloc");
exit(1);
}
event_init();
for (cp = pipes, i = 0; i < num_pipes; i++, cp += 2) {
if (pipe(cp) == -1) {
perror("pipe");
exit(1);
}
}
for (i = 0; i < 25; i++) {
tv = run_once(events, pipes, num_pipes, num_active);
if (tv == NULL)
exit(1);
fprintf(stdout, "%ld\n",
tv->tv_sec * 1000000L + tv->tv_usec);
}
exit(0);
}