1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2011 NetApp, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31 /* 32 * Test program for the micro event library. Set up a simple TCP echo 33 * service. 34 * 35 * cc mevent_test.c mevent.c -lpthread 36 */ 37 38 #include <sys/types.h> 39 #include <sys/stdint.h> 40 #include <sys/sysctl.h> 41 #include <sys/socket.h> 42 #include <netinet/in.h> 43 #include <machine/cpufunc.h> 44 45 #include <stdio.h> 46 #include <stdlib.h> 47 #include <pthread.h> 48 #include <unistd.h> 49 50 #include "mevent.h" 51 52 #define TEST_PORT 4321 53 54 static pthread_mutex_t accept_mutex = PTHREAD_MUTEX_INITIALIZER; 55 static pthread_cond_t accept_condvar = PTHREAD_COND_INITIALIZER; 56 57 static struct mevent *tevp; 58 59 60 #define MEVENT_ECHO 61 62 /* Number of timer events to capture */ 63 #define TEVSZ 4096 64 uint64_t tevbuf[TEVSZ]; 65 66 static void 67 timer_print(void) 68 { 69 uint64_t min, max, diff, sum, tsc_freq; 70 size_t len; 71 int j; 72 73 min = UINT64_MAX; 74 max = 0; 75 sum = 0; 76 77 len = sizeof(tsc_freq); 78 sysctlbyname("machdep.tsc_freq", &tsc_freq, &len, NULL, 0); 79 80 for (j = 1; j < TEVSZ; j++) { 81 /* Convert a tsc diff into microseconds */ 82 diff = (tevbuf[j] - tevbuf[j-1]) * 1000000 / tsc_freq; 83 sum += diff; 84 if (min > diff) 85 min = diff; 86 if (max < diff) 87 max = diff; 88 } 89 90 printf("timers done: usecs, min %ld, max %ld, mean %ld\n", min, max, 91 sum/(TEVSZ - 1)); 92 } 93 94 static void 95 timer_callback(int fd, enum ev_type type, void *param) 96 { 97 static int i; 98 99 if (i >= TEVSZ) 100 abort(); 101 102 tevbuf[i++] = rdtsc(); 103 104 if (i == TEVSZ) { 105 mevent_delete(tevp); 106 timer_print(); 107 } 108 } 109 110 111 #ifdef MEVENT_ECHO 112 struct esync { 113 pthread_mutex_t e_mt; 114 pthread_cond_t e_cond; 115 }; 116 117 static void 118 echoer_callback(int fd, enum ev_type type, void *param) 119 { 120 struct esync *sync = param; 121 122 pthread_mutex_lock(&sync->e_mt); 123 pthread_cond_signal(&sync->e_cond); 124 pthread_mutex_unlock(&sync->e_mt); 125 } 126 127 static void * 128 echoer(void *param) 129 { 130 struct esync sync; 131 struct mevent *mev; 132 char buf[128]; 133 int fd = (int)(uintptr_t) param; 134 int len; 135 136 pthread_mutex_init(&sync.e_mt, NULL); 137 pthread_cond_init(&sync.e_cond, NULL); 138 139 pthread_mutex_lock(&sync.e_mt); 140 141 mev = mevent_add(fd, EVF_READ, echoer_callback, &sync); 142 if (mev == NULL) { 143 printf("Could not allocate echoer event\n"); 144 exit(4); 145 } 146 147 while (!pthread_cond_wait(&sync.e_cond, &sync.e_mt)) { 148 len = read(fd, buf, sizeof(buf)); 149 if (len > 0) { 150 write(fd, buf, len); 151 write(0, buf, len); 152 } else { 153 break; 154 } 155 } 156 157 mevent_delete_close(mev); 158 159 pthread_mutex_unlock(&sync.e_mt); 160 pthread_mutex_destroy(&sync.e_mt); 161 pthread_cond_destroy(&sync.e_cond); 162 163 return (NULL); 164 } 165 166 #else 167 168 static void * 169 echoer(void *param) 170 { 171 char buf[128]; 172 int fd = (int)(uintptr_t) param; 173 int len; 174 175 while ((len = read(fd, buf, sizeof(buf))) > 0) { 176 write(1, buf, len); 177 } 178 179 return (NULL); 180 } 181 #endif /* MEVENT_ECHO */ 182 183 static void 184 acceptor_callback(int fd, enum ev_type type, void *param) 185 { 186 pthread_mutex_lock(&accept_mutex); 187 pthread_cond_signal(&accept_condvar); 188 pthread_mutex_unlock(&accept_mutex); 189 } 190 191 static void * 192 acceptor(void *param) 193 { 194 struct sockaddr_in sin; 195 pthread_t tid; 196 int news; 197 int s; 198 static int first; 199 200 if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0) { 201 perror("cannot create socket"); 202 exit(4); 203 } 204 205 sin.sin_len = sizeof(sin); 206 sin.sin_family = AF_INET; 207 sin.sin_addr.s_addr = htonl(INADDR_ANY); 208 sin.sin_port = htons(TEST_PORT); 209 210 if (bind(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) { 211 perror("cannot bind socket"); 212 exit(4); 213 } 214 215 if (listen(s, 1) < 0) { 216 perror("cannot listen socket"); 217 exit(4); 218 } 219 220 (void) mevent_add(s, EVF_READ, acceptor_callback, NULL); 221 222 pthread_mutex_lock(&accept_mutex); 223 224 while (!pthread_cond_wait(&accept_condvar, &accept_mutex)) { 225 news = accept(s, NULL, NULL); 226 if (news < 0) { 227 perror("accept error"); 228 } else { 229 static int first = 1; 230 231 if (first) { 232 /* 233 * Start a timer 234 */ 235 first = 0; 236 tevp = mevent_add(1, EVF_TIMER, timer_callback, 237 NULL); 238 } 239 240 printf("incoming connection, spawning thread\n"); 241 pthread_create(&tid, NULL, echoer, 242 (void *)(uintptr_t)news); 243 } 244 } 245 246 return (NULL); 247 } 248 249 main() 250 { 251 pthread_t tid; 252 253 pthread_create(&tid, NULL, acceptor, NULL); 254 255 mevent_dispatch(); 256 } 257