1 /* $NetBSD: bench.c,v 1.1.1.1 2013/04/11 16:43:32 christos Exp $ */ 2 /* 3 * Copyright 2003-2007 Niels Provos <provos@citi.umich.edu> 4 * Copyright 2007-2012 Niels Provos and Nick Mathewson 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 4. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * 29 * Mon 03/10/2003 - Modified by Davide Libenzi <davidel@xmailserver.org> 30 * 31 * Added chain event propagation to improve the sensitivity of 32 * the measure respect to the event loop efficency. 33 * 34 * 35 */ 36 37 #include "event2/event-config.h" 38 #include <sys/cdefs.h> 39 __RCSID("$NetBSD: bench.c,v 1.1.1.1 2013/04/11 16:43:32 christos Exp $"); 40 41 #include <sys/types.h> 42 #include <sys/stat.h> 43 #ifdef _EVENT_HAVE_SYS_TIME_H 44 #include <sys/time.h> 45 #endif 46 #ifdef WIN32 47 #define WIN32_LEAN_AND_MEAN 48 #include <windows.h> 49 #else 50 #include <sys/socket.h> 51 #include <signal.h> 52 #include <sys/resource.h> 53 #endif 54 #include <fcntl.h> 55 #include <stdlib.h> 56 #include <stdio.h> 57 #include <string.h> 58 #ifdef _EVENT_HAVE_UNISTD_H 59 #include <unistd.h> 60 #endif 61 #include <errno.h> 62 63 #include <event.h> 64 #include <evutil.h> 65 66 static int count, writes, fired; 67 static evutil_socket_t *pipes; 68 static int num_pipes, num_active, num_writes; 69 static struct event *events; 70 71 72 static void 73 read_cb(evutil_socket_t fd, short which, void *arg) 74 { 75 ev_intptr_t idx = (ev_intptr_t) arg, widx = idx + 1; 76 u_char ch; 77 78 count += recv(fd, (char*)&ch, sizeof(ch), 0); 79 if (writes) { 80 if (widx >= num_pipes) 81 widx -= num_pipes; 82 send(pipes[2 * widx + 1], "e", 1, 0); 83 writes--; 84 fired++; 85 } 86 } 87 88 static struct timeval * 89 run_once(void) 90 { 91 evutil_socket_t *cp, space; 92 long i; 93 static struct timeval ts, te; 94 95 for (cp = pipes, i = 0; i < num_pipes; i++, cp += 2) { 96 if (event_initialized(&events[i])) 97 event_del(&events[i]); 98 event_set(&events[i], cp[0], EV_READ | EV_PERSIST, read_cb, (void *)(ev_intptr_t) i); 99 event_add(&events[i], NULL); 100 } 101 102 event_loop(EVLOOP_ONCE | EVLOOP_NONBLOCK); 103 104 fired = 0; 105 space = num_pipes / num_active; 106 space = space * 2; 107 for (i = 0; i < num_active; i++, fired++) 108 send(pipes[i * space + 1], "e", 1, 0); 109 110 count = 0; 111 writes = num_writes; 112 { int xcount = 0; 113 evutil_gettimeofday(&ts, NULL); 114 do { 115 event_loop(EVLOOP_ONCE | EVLOOP_NONBLOCK); 116 xcount++; 117 } while (count != fired); 118 evutil_gettimeofday(&te, NULL); 119 120 if (xcount != count) fprintf(stderr, "Xcount: %d, Rcount: %d\n", xcount, count); 121 } 122 123 evutil_timersub(&te, &ts, &te); 124 125 return (&te); 126 } 127 128 int 129 main(int argc, char **argv) 130 { 131 #ifndef WIN32 132 struct rlimit rl; 133 #endif 134 int i, c; 135 struct timeval *tv; 136 evutil_socket_t *cp; 137 138 #ifdef WIN32 139 WSADATA WSAData; 140 WSAStartup(0x101, &WSAData); 141 #endif 142 num_pipes = 100; 143 num_active = 1; 144 num_writes = num_pipes; 145 while ((c = getopt(argc, argv, "n:a:w:")) != -1) { 146 switch (c) { 147 case 'n': 148 num_pipes = atoi(optarg); 149 break; 150 case 'a': 151 num_active = atoi(optarg); 152 break; 153 case 'w': 154 num_writes = atoi(optarg); 155 break; 156 default: 157 fprintf(stderr, "Illegal argument \"%c\"\n", c); 158 exit(1); 159 } 160 } 161 162 #ifndef WIN32 163 rl.rlim_cur = rl.rlim_max = num_pipes * 2 + 50; 164 if (setrlimit(RLIMIT_NOFILE, &rl) == -1) { 165 perror("setrlimit"); 166 exit(1); 167 } 168 #endif 169 170 events = calloc(num_pipes, sizeof(struct event)); 171 pipes = calloc(num_pipes * 2, sizeof(evutil_socket_t)); 172 if (events == NULL || pipes == NULL) { 173 perror("malloc"); 174 exit(1); 175 } 176 177 event_init(); 178 179 for (cp = pipes, i = 0; i < num_pipes; i++, cp += 2) { 180 #ifdef USE_PIPES 181 if (pipe(cp) == -1) { 182 #else 183 if (evutil_socketpair(AF_UNIX, SOCK_STREAM, 0, cp) == -1) { 184 #endif 185 perror("pipe"); 186 exit(1); 187 } 188 } 189 190 for (i = 0; i < 25; i++) { 191 tv = run_once(); 192 if (tv == NULL) 193 exit(1); 194 fprintf(stdout, "%ld\n", 195 tv->tv_sec * 1000000L + tv->tv_usec); 196 } 197 198 exit(0); 199 } 200