selfcare init

proxy_c/third-lib/libevent-2.1.11-stable/test/bench.c

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+/*
+ * 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 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_set(&events[i], cp[0], EV_READ | EV_PERSIST, read_cb, (void *)(ev_intptr_t) i);
+		event_add(&events[i], NULL);
+	}
+
+	event_loop(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_loop(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;
+
+#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:")) != -1) {
+		switch (c) {
+		case 'n':
+			num_pipes = atoi(optarg);
+			break;
+		case 'a':
+			num_active = atoi(optarg);
+			break;
+		case 'w':
+			num_writes = atoi(optarg);
+			break;
+		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);
+	}
+
+	event_init();
+
+	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);
+}