summaryrefslogtreecommitdiffstats
path: root/libevent/test/bench.c
diff options
context:
space:
mode:
Diffstat (limited to 'libevent/test/bench.c')
-rw-r--r--libevent/test/bench.c235
1 files changed, 235 insertions, 0 deletions
diff --git a/libevent/test/bench.c b/libevent/test/bench.c
new file mode 100644
index 0000000..f2af4d3
--- /dev/null
+++ b/libevent/test/bench.c
@@ -0,0 +1,235 @@
+/*
+ * Copyright 2003-2007 Niels Provos <provos@citi.umich.edu>
+ * Copyright 2007-2012 Niels Provos and Nick Mathewson
+ *
+ * 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.
+ * 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.
+ *
+ *
+ * Mon 03/10/2003 - Modified by Davide Libenzi <davidel@xmailserver.org>
+ *
+ * Added chain event propagation to improve the sensitivity of
+ * the measure respect to the event loop efficency.
+ *
+ *
+ */
+
+#include "event2/event-config.h"
+#include "../util-internal.h"
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#ifdef EVENT__HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif
+#ifdef _WIN32
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#else
+#include <sys/socket.h>
+#include <signal.h>
+#include <sys/resource.h>
+#endif
+#include <fcntl.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#ifdef EVENT__HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include <errno.h>
+
+#ifdef _WIN32
+#include <getopt.h>
+#endif
+
+#include <event.h>
+#include <evutil.h>
+
+static ev_ssize_t count, fired;
+static int writes, failures;
+static evutil_socket_t *pipes;
+static int num_pipes, num_active, num_writes;
+static struct event *events;
+static struct event_base *base;
+
+
+static void
+read_cb(evutil_socket_t fd, short which, void *arg)
+{
+ ev_intptr_t idx = (ev_intptr_t) arg, widx = idx + 1;
+ unsigned char ch;
+ ev_ssize_t n;
+
+ n = recv(fd, (char*)&ch, sizeof(ch), 0);
+ if (n >= 0)
+ count += n;
+ else
+ failures++;
+ if (writes) {
+ if (widx >= num_pipes)
+ widx -= num_pipes;
+ n = send(pipes[2 * widx + 1], "e", 1, 0);
+ if (n != 1)
+ failures++;
+ writes--;
+ fired++;
+ }
+}
+
+static struct timeval *
+run_once(void)
+{
+ evutil_socket_t *cp, space;
+ long i;
+ static struct timeval ts, te;
+
+ for (cp = pipes, i = 0; i < num_pipes; i++, cp += 2) {
+ if (event_initialized(&events[i]))
+ event_del(&events[i]);
+ event_assign(&events[i], base, cp[0], EV_READ | EV_PERSIST, read_cb, (void *)(ev_intptr_t) i);
+ event_add(&events[i], NULL);
+ }
+
+ event_base_loop(base, EVLOOP_ONCE | EVLOOP_NONBLOCK);
+
+ fired = 0;
+ space = num_pipes / num_active;
+ space = space * 2;
+ for (i = 0; i < num_active; i++, fired++)
+ (void) send(pipes[i * space + 1], "e", 1, 0);
+
+ count = 0;
+ writes = num_writes;
+ {
+ int xcount = 0;
+ evutil_gettimeofday(&ts, NULL);
+ do {
+ event_base_loop(base, EVLOOP_ONCE | EVLOOP_NONBLOCK);
+ xcount++;
+ } while (count != fired);
+ evutil_gettimeofday(&te, NULL);
+
+ if (xcount != count)
+ fprintf(stderr, "Xcount: %d, Rcount: " EV_SSIZE_FMT "\n",
+ xcount, count);
+ }
+
+ evutil_timersub(&te, &ts, &te);
+
+ return (&te);
+}
+
+int
+main(int argc, char **argv)
+{
+#ifdef EVENT__HAVE_SETRLIMIT
+ struct rlimit rl;
+#endif
+ int i, c;
+ struct timeval *tv;
+ evutil_socket_t *cp;
+ const char **methods;
+ const char *method = NULL;
+ struct event_config *cfg = NULL;
+
+#ifdef _WIN32
+ WSADATA WSAData;
+ WSAStartup(0x101, &WSAData);
+#endif
+ num_pipes = 100;
+ num_active = 1;
+ num_writes = num_pipes;
+ while ((c = getopt(argc, argv, "n:a:w:m:l")) != -1) {
+ switch (c) {
+ case 'n':
+ num_pipes = atoi(optarg);
+ break;
+ case 'a':
+ num_active = atoi(optarg);
+ break;
+ case 'w':
+ num_writes = atoi(optarg);
+ break;
+ case 'm':
+ method = optarg;
+ break;
+ case 'l':
+ methods = event_get_supported_methods();
+ fprintf(stdout, "Using Libevent %s. Available methods are:\n",
+ event_get_version());
+ for (i = 0; methods[i] != NULL; ++i)
+ printf(" %s\n", methods[i]);
+ exit(0);
+ default:
+ fprintf(stderr, "Illegal argument \"%c\"\n", c);
+ exit(1);
+ }
+ }
+
+#ifdef EVENT__HAVE_SETRLIMIT
+ rl.rlim_cur = rl.rlim_max = num_pipes * 2 + 50;
+ if (setrlimit(RLIMIT_NOFILE, &rl) == -1) {
+ perror("setrlimit");
+ exit(1);
+ }
+#endif
+
+ events = calloc(num_pipes, sizeof(struct event));
+ pipes = calloc(num_pipes * 2, sizeof(evutil_socket_t));
+ if (events == NULL || pipes == NULL) {
+ perror("malloc");
+ exit(1);
+ }
+
+ if (method != NULL) {
+ cfg = event_config_new();
+ methods = event_get_supported_methods();
+ for (i = 0; methods[i] != NULL; ++i)
+ if (strcmp(methods[i], method))
+ event_config_avoid_method(cfg, methods[i]);
+ base = event_base_new_with_config(cfg);
+ event_config_free(cfg);
+ } else
+ base = event_base_new();
+
+ for (cp = pipes, i = 0; i < num_pipes; i++, cp += 2) {
+#ifdef USE_PIPES
+ if (pipe(cp) == -1) {
+#else
+ if (evutil_socketpair(AF_UNIX, SOCK_STREAM, 0, cp) == -1) {
+#endif
+ perror("pipe");
+ exit(1);
+ }
+ }
+
+ for (i = 0; i < 25; i++) {
+ tv = run_once();
+ if (tv == NULL)
+ exit(1);
+ fprintf(stdout, "%ld\n",
+ tv->tv_sec * 1000000L + tv->tv_usec);
+ }
+
+ exit(0);
+}