1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
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
29 /*
30 * Test program for the micro event library. Set up a simple TCP echo
31 * service.
32 *
33 * cc mevent_test.c mevent.c -lpthread
34 */
35
36 #include <sys/types.h>
37 #include <sys/stdint.h>
38 #include <sys/sysctl.h>
39 #include <sys/socket.h>
40 #include <netinet/in.h>
41 #include <machine/cpufunc.h>
42
43 #include <stdio.h>
44 #include <stdlib.h>
45 #include <pthread.h>
46 #include <unistd.h>
47
48 #include "mevent.h"
49
50 #define TEST_PORT 4321
51
52 static pthread_mutex_t accept_mutex = PTHREAD_MUTEX_INITIALIZER;
53 static pthread_cond_t accept_condvar = PTHREAD_COND_INITIALIZER;
54
55 static struct mevent *tevp;
56
57
58 #define MEVENT_ECHO
59
60 /* Number of timer events to capture */
61 #define TEVSZ 4096
62 uint64_t tevbuf[TEVSZ];
63
64 static void
timer_print(void)65 timer_print(void)
66 {
67 uint64_t min, max, diff, sum, tsc_freq;
68 size_t len;
69 int j;
70
71 min = UINT64_MAX;
72 max = 0;
73 sum = 0;
74
75 len = sizeof(tsc_freq);
76 sysctlbyname("machdep.tsc_freq", &tsc_freq, &len, NULL, 0);
77
78 for (j = 1; j < TEVSZ; j++) {
79 /* Convert a tsc diff into microseconds */
80 diff = (tevbuf[j] - tevbuf[j-1]) * 1000000 / tsc_freq;
81 sum += diff;
82 if (min > diff)
83 min = diff;
84 if (max < diff)
85 max = diff;
86 }
87
88 printf("timers done: usecs, min %ld, max %ld, mean %ld\n", min, max,
89 sum/(TEVSZ - 1));
90 }
91
92 static void
timer_callback(int fd,enum ev_type type,void * param)93 timer_callback(int fd, enum ev_type type, void *param)
94 {
95 static int i;
96
97 if (i >= TEVSZ)
98 abort();
99
100 tevbuf[i++] = rdtsc();
101
102 if (i == TEVSZ) {
103 mevent_delete(tevp);
104 timer_print();
105 }
106 }
107
108
109 #ifdef MEVENT_ECHO
110 struct esync {
111 pthread_mutex_t e_mt;
112 pthread_cond_t e_cond;
113 };
114
115 static void
echoer_callback(int fd,enum ev_type type,void * param)116 echoer_callback(int fd, enum ev_type type, void *param)
117 {
118 struct esync *sync = param;
119
120 pthread_mutex_lock(&sync->e_mt);
121 pthread_cond_signal(&sync->e_cond);
122 pthread_mutex_unlock(&sync->e_mt);
123 }
124
125 static void *
echoer(void * param)126 echoer(void *param)
127 {
128 struct esync sync;
129 struct mevent *mev;
130 char buf[128];
131 int fd = (int)(uintptr_t) param;
132 int len;
133
134 pthread_mutex_init(&sync.e_mt, NULL);
135 pthread_cond_init(&sync.e_cond, NULL);
136
137 pthread_mutex_lock(&sync.e_mt);
138
139 mev = mevent_add(fd, EVF_READ, echoer_callback, &sync);
140 if (mev == NULL) {
141 printf("Could not allocate echoer event\n");
142 exit(4);
143 }
144
145 while (!pthread_cond_wait(&sync.e_cond, &sync.e_mt)) {
146 len = read(fd, buf, sizeof(buf));
147 if (len > 0) {
148 write(fd, buf, len);
149 write(0, buf, len);
150 } else {
151 break;
152 }
153 }
154
155 mevent_delete_close(mev);
156
157 pthread_mutex_unlock(&sync.e_mt);
158 pthread_mutex_destroy(&sync.e_mt);
159 pthread_cond_destroy(&sync.e_cond);
160
161 return (NULL);
162 }
163
164 #else
165
166 static void *
echoer(void * param)167 echoer(void *param)
168 {
169 char buf[128];
170 int fd = (int)(uintptr_t) param;
171 int len;
172
173 while ((len = read(fd, buf, sizeof(buf))) > 0) {
174 write(1, buf, len);
175 }
176
177 return (NULL);
178 }
179 #endif /* MEVENT_ECHO */
180
181 static void
acceptor_callback(int fd,enum ev_type type,void * param)182 acceptor_callback(int fd, enum ev_type type, void *param)
183 {
184 pthread_mutex_lock(&accept_mutex);
185 pthread_cond_signal(&accept_condvar);
186 pthread_mutex_unlock(&accept_mutex);
187 }
188
189 static void *
acceptor(void * param)190 acceptor(void *param)
191 {
192 struct sockaddr_in sin;
193 pthread_t tid;
194 int news;
195 int s;
196 static int first;
197
198 if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
199 perror("cannot create socket");
200 exit(4);
201 }
202
203 sin.sin_len = sizeof(sin);
204 sin.sin_family = AF_INET;
205 sin.sin_addr.s_addr = htonl(INADDR_ANY);
206 sin.sin_port = htons(TEST_PORT);
207
208 if (bind(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
209 perror("cannot bind socket");
210 exit(4);
211 }
212
213 if (listen(s, 1) < 0) {
214 perror("cannot listen socket");
215 exit(4);
216 }
217
218 (void) mevent_add(s, EVF_READ, acceptor_callback, NULL);
219
220 pthread_mutex_lock(&accept_mutex);
221
222 while (!pthread_cond_wait(&accept_condvar, &accept_mutex)) {
223 news = accept(s, NULL, NULL);
224 if (news < 0) {
225 perror("accept error");
226 } else {
227 static int first = 1;
228
229 if (first) {
230 /*
231 * Start a timer
232 */
233 first = 0;
234 tevp = mevent_add(1, EVF_TIMER, timer_callback,
235 NULL);
236 }
237
238 printf("incoming connection, spawning thread\n");
239 pthread_create(&tid, NULL, echoer,
240 (void *)(uintptr_t)news);
241 }
242 }
243
244 return (NULL);
245 }
246
main()247 main()
248 {
249 pthread_t tid;
250
251 pthread_create(&tid, NULL, acceptor, NULL);
252
253 mevent_dispatch();
254 }
255