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comparison: ipc/chromium/src/third_party/libevent/test/bench.c
ipc/chromium/src/third_party/libevent/test/bench.c
- branch
- TOR_BUG_3246
- changeset 6
- 8bccb770b82d
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| -1:000000000000 | 0:87e9d069f9f6 |
|---|---|
| 1 /* | |
| 2 * Copyright 2003-2007 Niels Provos <provos@citi.umich.edu> | |
| 3 * Copyright 2007-2012 Niels Provos and Nick Mathewson | |
| 4 * | |
| 5 * Redistribution and use in source and binary forms, with or without | |
| 6 * modification, are permitted provided that the following conditions | |
| 7 * are met: | |
| 8 * 1. Redistributions of source code must retain the above copyright | |
| 9 * notice, this list of conditions and the following disclaimer. | |
| 10 * 2. Redistributions in binary form must reproduce the above copyright | |
| 11 * notice, this list of conditions and the following disclaimer in the | |
| 12 * documentation and/or other materials provided with the distribution. | |
| 13 * 4. The name of the author may not be used to endorse or promote products | |
| 14 * derived from this software without specific prior written permission. | |
| 15 * | |
| 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
| 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
| 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
| 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
| 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
| 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
| 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 26 * | |
| 27 * | |
| 28 * Mon 03/10/2003 - Modified by Davide Libenzi <davidel@xmailserver.org> | |
| 29 * | |
| 30 * Added chain event propagation to improve the sensitivity of | |
| 31 * the measure respect to the event loop efficency. | |
| 32 * | |
| 33 * | |
| 34 */ | |
| 35 | |
| 36 #include "event2/event-config.h" | |
| 37 | |
| 38 #include <sys/types.h> | |
| 39 #include <sys/stat.h> | |
| 40 #ifdef _EVENT_HAVE_SYS_TIME_H | |
| 41 #include <sys/time.h> | |
| 42 #endif | |
| 43 #ifdef WIN32 | |
| 44 #define WIN32_LEAN_AND_MEAN | |
| 45 #include <windows.h> | |
| 46 #else | |
| 47 #include <sys/socket.h> | |
| 48 #include <signal.h> | |
| 49 #include <sys/resource.h> | |
| 50 #endif | |
| 51 #include <fcntl.h> | |
| 52 #include <stdlib.h> | |
| 53 #include <stdio.h> | |
| 54 #include <string.h> | |
| 55 #ifdef _EVENT_HAVE_UNISTD_H | |
| 56 #include <unistd.h> | |
| 57 #endif | |
| 58 #include <errno.h> | |
| 59 | |
| 60 #include <event.h> | |
| 61 #include <evutil.h> | |
| 62 | |
| 63 static int count, writes, fired; | |
| 64 static evutil_socket_t *pipes; | |
| 65 static int num_pipes, num_active, num_writes; | |
| 66 static struct event *events; | |
| 67 | |
| 68 | |
| 69 static void | |
| 70 read_cb(evutil_socket_t fd, short which, void *arg) | |
| 71 { | |
| 72 ev_intptr_t idx = (ev_intptr_t) arg, widx = idx + 1; | |
| 73 u_char ch; | |
| 74 | |
| 75 count += recv(fd, (char*)&ch, sizeof(ch), 0); | |
| 76 if (writes) { | |
| 77 if (widx >= num_pipes) | |
| 78 widx -= num_pipes; | |
| 79 send(pipes[2 * widx + 1], "e", 1, 0); | |
| 80 writes--; | |
| 81 fired++; | |
| 82 } | |
| 83 } | |
| 84 | |
| 85 static struct timeval * | |
| 86 run_once(void) | |
| 87 { | |
| 88 evutil_socket_t *cp, space; | |
| 89 long i; | |
| 90 static struct timeval ts, te; | |
| 91 | |
| 92 for (cp = pipes, i = 0; i < num_pipes; i++, cp += 2) { | |
| 93 if (event_initialized(&events[i])) | |
| 94 event_del(&events[i]); | |
| 95 event_set(&events[i], cp[0], EV_READ | EV_PERSIST, read_cb, (void *)(ev_intptr_t) i); | |
| 96 event_add(&events[i], NULL); | |
| 97 } | |
| 98 | |
| 99 event_loop(EVLOOP_ONCE | EVLOOP_NONBLOCK); | |
| 100 | |
| 101 fired = 0; | |
| 102 space = num_pipes / num_active; | |
| 103 space = space * 2; | |
| 104 for (i = 0; i < num_active; i++, fired++) | |
| 105 send(pipes[i * space + 1], "e", 1, 0); | |
| 106 | |
| 107 count = 0; | |
| 108 writes = num_writes; | |
| 109 { int xcount = 0; | |
| 110 evutil_gettimeofday(&ts, NULL); | |
| 111 do { | |
| 112 event_loop(EVLOOP_ONCE | EVLOOP_NONBLOCK); | |
| 113 xcount++; | |
| 114 } while (count != fired); | |
| 115 evutil_gettimeofday(&te, NULL); | |
| 116 | |
| 117 if (xcount != count) fprintf(stderr, "Xcount: %d, Rcount: %d\n", xcount, count); | |
| 118 } | |
| 119 | |
| 120 evutil_timersub(&te, &ts, &te); | |
| 121 | |
| 122 return (&te); | |
| 123 } | |
| 124 | |
| 125 int | |
| 126 main(int argc, char **argv) | |
| 127 { | |
| 128 #ifndef WIN32 | |
| 129 struct rlimit rl; | |
| 130 #endif | |
| 131 int i, c; | |
| 132 struct timeval *tv; | |
| 133 evutil_socket_t *cp; | |
| 134 | |
| 135 #ifdef WIN32 | |
| 136 WSADATA WSAData; | |
| 137 WSAStartup(0x101, &WSAData); | |
| 138 #endif | |
| 139 num_pipes = 100; | |
| 140 num_active = 1; | |
| 141 num_writes = num_pipes; | |
| 142 while ((c = getopt(argc, argv, "n:a:w:")) != -1) { | |
| 143 switch (c) { | |
| 144 case 'n': | |
| 145 num_pipes = atoi(optarg); | |
| 146 break; | |
| 147 case 'a': | |
| 148 num_active = atoi(optarg); | |
| 149 break; | |
| 150 case 'w': | |
| 151 num_writes = atoi(optarg); | |
| 152 break; | |
| 153 default: | |
| 154 fprintf(stderr, "Illegal argument \"%c\"\n", c); | |
| 155 exit(1); | |
| 156 } | |
| 157 } | |
| 158 | |
| 159 #ifndef WIN32 | |
| 160 rl.rlim_cur = rl.rlim_max = num_pipes * 2 + 50; | |
| 161 if (setrlimit(RLIMIT_NOFILE, &rl) == -1) { | |
| 162 perror("setrlimit"); | |
| 163 exit(1); | |
| 164 } | |
| 165 #endif | |
| 166 | |
| 167 events = calloc(num_pipes, sizeof(struct event)); | |
| 168 pipes = calloc(num_pipes * 2, sizeof(evutil_socket_t)); | |
| 169 if (events == NULL || pipes == NULL) { | |
| 170 perror("malloc"); | |
| 171 exit(1); | |
| 172 } | |
| 173 | |
| 174 event_init(); | |
| 175 | |
| 176 for (cp = pipes, i = 0; i < num_pipes; i++, cp += 2) { | |
| 177 #ifdef USE_PIPES | |
| 178 if (pipe(cp) == -1) { | |
| 179 #else | |
| 180 if (evutil_socketpair(AF_UNIX, SOCK_STREAM, 0, cp) == -1) { | |
| 181 #endif | |
| 182 perror("pipe"); | |
| 183 exit(1); | |
| 184 } | |
| 185 } | |
| 186 | |
| 187 for (i = 0; i < 25; i++) { | |
| 188 tv = run_once(); | |
| 189 if (tv == NULL) | |
| 190 exit(1); | |
| 191 fprintf(stdout, "%ld\n", | |
| 192 tv->tv_sec * 1000000L + tv->tv_usec); | |
| 193 } | |
| 194 | |
| 195 exit(0); | |
| 196 } |
