bench_httpclient.c revision 290001 
1/*
2 * Copyright 2009-2012 Niels Provos and Nick Mathewson
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 * 4. The name of the author may not be used to endorse or promote products
13 *    derived from this software without specific prior written permission.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 *
26 */
27
28/* for EVUTIL_ERR_CONNECT_RETRIABLE macro */
29#include "util-internal.h"
30
31#include <sys/types.h>
32#ifdef _WIN32
33#include <winsock2.h>
34#else
35#include <sys/socket.h>
36#include <netinet/in.h>
37# ifdef _XOPEN_SOURCE_EXTENDED
38#  include <arpa/inet.h>
39# endif
40#endif
41#include <stdlib.h>
42#include <string.h>
43#include <errno.h>
44
45#include "event2/event.h"
46#include "event2/bufferevent.h"
47#include "event2/buffer.h"
48#include "event2/util.h"
49
50const char *resource = NULL;
51struct event_base *base = NULL;
52
53int total_n_handled = 0;
54int total_n_errors = 0;
55int total_n_launched = 0;
56size_t total_n_bytes = 0;
57struct timeval total_time = {0,0};
58int n_errors = 0;
59
60const int PARALLELISM = 200;
61const int N_REQUESTS = 20000;
62
63struct request_info {
64	size_t n_read;
65	struct timeval started;
66};
67
68static int launch_request(void);
69static void readcb(struct bufferevent *b, void *arg);
70static void errorcb(struct bufferevent *b, short what, void *arg);
71
72static void
73readcb(struct bufferevent *b, void *arg)
74{
75	struct request_info *ri = arg;
76	struct evbuffer *input = bufferevent_get_input(b);
77	size_t n = evbuffer_get_length(input);
78
79	ri->n_read += n;
80	evbuffer_drain(input, n);
81}
82
83static void
84errorcb(struct bufferevent *b, short what, void *arg)
85{
86	struct request_info *ri = arg;
87	struct timeval now, diff;
88	if (what & BEV_EVENT_EOF) {
89		++total_n_handled;
90		total_n_bytes += ri->n_read;
91		evutil_gettimeofday(&now, NULL);
92		evutil_timersub(&now, &ri->started, &diff);
93		evutil_timeradd(&diff, &total_time, &total_time);
94
95		if (total_n_handled && (total_n_handled%1000)==0)
96			printf("%d requests done\n",total_n_handled);
97
98		if (total_n_launched < N_REQUESTS) {
99			if (launch_request() < 0)
100				perror("Can't launch");
101		}
102	} else {
103		++total_n_errors;
104		perror("Unexpected error");
105	}
106
107	bufferevent_setcb(b, NULL, NULL, NULL, NULL);
108	free(ri);
109	bufferevent_disable(b, EV_READ|EV_WRITE);
110	bufferevent_free(b);
111}
112
113static void
114frob_socket(evutil_socket_t sock)
115{
116#ifdef HAVE_SO_LINGER
117	struct linger l;
118#endif
119	int one = 1;
120	if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void*)&one, sizeof(one))<0)
121		perror("setsockopt(SO_REUSEADDR)");
122#ifdef HAVE_SO_LINGER
123	l.l_onoff = 1;
124	l.l_linger = 0;
125	if (setsockopt(sock, SOL_SOCKET, SO_LINGER, (void*)&l, sizeof(l))<0)
126		perror("setsockopt(SO_LINGER)");
127#endif
128}
129
130static int
131launch_request(void)
132{
133	evutil_socket_t sock;
134	struct sockaddr_in sin;
135	struct bufferevent *b;
136
137	struct request_info *ri;
138
139	memset(&sin, 0, sizeof(sin));
140
141	++total_n_launched;
142
143	sin.sin_family = AF_INET;
144	sin.sin_addr.s_addr = htonl(0x7f000001);
145	sin.sin_port = htons(8080);
146	if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0)
147		return -1;
148	if (evutil_make_socket_nonblocking(sock) < 0) {
149		evutil_closesocket(sock);
150		return -1;
151	}
152	frob_socket(sock);
153	if (connect(sock, (struct sockaddr*)&sin, sizeof(sin)) < 0) {
154		int e = errno;
155		if (! EVUTIL_ERR_CONNECT_RETRIABLE(e)) {
156			evutil_closesocket(sock);
157			return -1;
158		}
159	}
160
161	ri = malloc(sizeof(*ri));
162	if (ri == NULL) {
163		printf("Unable to allocate memory in launch_request()\n");
164		return -1;
165	}
166	ri->n_read = 0;
167	evutil_gettimeofday(&ri->started, NULL);
168
169	b = bufferevent_socket_new(base, sock, BEV_OPT_CLOSE_ON_FREE);
170
171	bufferevent_setcb(b, readcb, NULL, errorcb, ri);
172	bufferevent_enable(b, EV_READ|EV_WRITE);
173
174	evbuffer_add_printf(bufferevent_get_output(b),
175	    "GET %s HTTP/1.0\r\n\r\n", resource);
176
177	return 0;
178}
179
180
181int
182main(int argc, char **argv)
183{
184	int i;
185	struct timeval start, end, total;
186	long long usec;
187	double throughput;
188	resource = "/ref";
189
190	setvbuf(stdout, NULL, _IONBF, 0);
191
192	base = event_base_new();
193
194	for (i=0; i < PARALLELISM; ++i) {
195		if (launch_request() < 0)
196			perror("launch");
197	}
198
199	evutil_gettimeofday(&start, NULL);
200
201	event_base_dispatch(base);
202
203	evutil_gettimeofday(&end, NULL);
204	evutil_timersub(&end, &start, &total);
205	usec = total_time.tv_sec * (long long)1000000 + total_time.tv_usec;
206
207	if (!total_n_handled) {
208		puts("Nothing worked.  You probably did something dumb.");
209		return 0;
210	}
211
212
213	throughput = total_n_handled /
214	    (total.tv_sec+ ((double)total.tv_usec)/1000000.0);
215
216#ifdef _WIN32
217#define I64_FMT "%I64d"
218#define I64_TYP __int64
219#else
220#define I64_FMT "%lld"
221#define I64_TYP long long int
222#endif
223
224	printf("\n%d requests in %d.%06d sec. (%.2f throughput)\n"
225	    "Each took about %.02f msec latency\n"
226	    I64_FMT "bytes read. %d errors.\n",
227	    total_n_handled,
228	    (int)total.tv_sec, (int)total.tv_usec,
229	    throughput,
230	    (double)(usec/1000) / total_n_handled,
231	    (I64_TYP)total_n_bytes, n_errors);
232
233	return 0;
234}
235