Annotation of embedaddon/libevent/test/bench.c, revision 1.1.1.1
1.1 misho 1: /*
2: * Copyright 2003 Niels Provos <provos@citi.umich.edu>
3: * All rights reserved.
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: #ifdef HAVE_CONFIG_H
37: #include "config.h"
38: #endif
39:
40: #include <sys/types.h>
41: #include <sys/stat.h>
42: #include <sys/time.h>
43: #ifdef WIN32
44: #include <windows.h>
45: #else
46: #include <sys/socket.h>
47: #include <signal.h>
48: #include <sys/resource.h>
49: #endif
50: #include <fcntl.h>
51: #include <stdlib.h>
52: #include <stdio.h>
53: #include <string.h>
54: #include <unistd.h>
55: #include <errno.h>
56:
57: #include <event.h>
58: #include <evutil.h>
59:
60:
61: static int count, writes, fired;
62: static int *pipes;
63: static int num_pipes, num_active, num_writes;
64: static struct event *events;
65:
66: static void
67: read_cb(int fd, short which, void *arg)
68: {
69: long idx = (long) arg, widx = idx + 1;
70: u_char ch;
71:
72: count += read(fd, &ch, sizeof(ch));
73: if (writes) {
74: if (widx >= num_pipes)
75: widx -= num_pipes;
76: write(pipes[2 * widx + 1], "e", 1);
77: writes--;
78: fired++;
79: }
80: }
81:
82: static struct timeval *
83: run_once(void)
84: {
85: int *cp, space;
86: long i;
87: static struct timeval ts, te;
88:
89: for (cp = pipes, i = 0; i < num_pipes; i++, cp += 2) {
90: event_del(&events[i]);
91: event_set(&events[i], cp[0], EV_READ | EV_PERSIST, read_cb, (void *) i);
92: event_add(&events[i], NULL);
93: }
94:
95: event_loop(EVLOOP_ONCE | EVLOOP_NONBLOCK);
96:
97: fired = 0;
98: space = num_pipes / num_active;
99: space = space * 2;
100: for (i = 0; i < num_active; i++, fired++)
101: write(pipes[i * space + 1], "e", 1);
102:
103: count = 0;
104: writes = num_writes;
105: { int xcount = 0;
106: gettimeofday(&ts, NULL);
107: do {
108: event_loop(EVLOOP_ONCE | EVLOOP_NONBLOCK);
109: xcount++;
110: } while (count != fired);
111: gettimeofday(&te, NULL);
112:
113: if (xcount != count) fprintf(stderr, "Xcount: %d, Rcount: %d\n", xcount, count);
114: }
115:
116: evutil_timersub(&te, &ts, &te);
117:
118: return (&te);
119: }
120:
121: int
122: main (int argc, char **argv)
123: {
124: #ifndef WIN32
125: struct rlimit rl;
126: #endif
127: int i, c;
128: struct timeval *tv;
129: int *cp;
130:
131: num_pipes = 100;
132: num_active = 1;
133: num_writes = num_pipes;
134: while ((c = getopt(argc, argv, "n:a:w:")) != -1) {
135: switch (c) {
136: case 'n':
137: num_pipes = atoi(optarg);
138: break;
139: case 'a':
140: num_active = atoi(optarg);
141: break;
142: case 'w':
143: num_writes = atoi(optarg);
144: break;
145: default:
146: fprintf(stderr, "Illegal argument \"%c\"\n", c);
147: exit(1);
148: }
149: }
150:
151: #ifndef WIN32
152: rl.rlim_cur = rl.rlim_max = num_pipes * 2 + 50;
153: if (setrlimit(RLIMIT_NOFILE, &rl) == -1) {
154: perror("setrlimit");
155: exit(1);
156: }
157: #endif
158:
159: events = calloc(num_pipes, sizeof(struct event));
160: pipes = calloc(num_pipes * 2, sizeof(int));
161: if (events == NULL || pipes == NULL) {
162: perror("malloc");
163: exit(1);
164: }
165:
166: event_init();
167:
168: for (cp = pipes, i = 0; i < num_pipes; i++, cp += 2) {
169: #ifdef USE_PIPES
170: if (pipe(cp) == -1) {
171: #else
172: if (evutil_socketpair(AF_UNIX, SOCK_STREAM, 0, cp) == -1) {
173: #endif
174: perror("pipe");
175: exit(1);
176: }
177: }
178:
179: for (i = 0; i < 25; i++) {
180: tv = run_once();
181: if (tv == NULL)
182: exit(1);
183: fprintf(stdout, "%ld\n",
184: tv->tv_sec * 1000000L + tv->tv_usec);
185: }
186:
187: exit(0);
188: }
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