simple bench mark

svn:r57

diff --git a/test/bench.c b/test/bench.c
new file mode 100644 (file)
index 0000000..d176799
--- /dev/null
+++ b/test/bench.c
@@ -0,0 +1,157 @@
+/*
+ * 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);
+}
+
+
+