1/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
2 *
3 * Permission is hereby granted, free of charge, to any person obtaining a copy
4 * of this software and associated documentation files (the "Software"), to
5 * deal in the Software without restriction, including without limitation the
6 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
7 * sell copies of the Software, and to permit persons to whom the Software is
8 * furnished to do so, subject to the following conditions:
9 *
10 * The above copyright notice and this permission notice shall be included in
11 * all copies or substantial portions of the Software.
12 *
13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
18 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
19 * IN THE SOFTWARE.
20 */
21
22#include "uv.h"
23#include "task.h"
24
25#include <stdlib.h>
26#include <stdio.h>
27
28/* Run the benchmark for this many ms */
29#define TIME 5000
30
31
32typedef struct {
33  int pongs;
34  int state;
35  uv_tcp_t tcp;
36  uv_connect_t connect_req;
37  uv_shutdown_t shutdown_req;
38} pinger_t;
39
40typedef struct buf_s {
41  uv_buf_t uv_buf_t;
42  struct buf_s* next;
43} buf_t;
44
45
46static char PING[] = "PING\n";
47
48static uv_loop_t* loop;
49
50static buf_t* buf_freelist = NULL;
51static int pinger_shutdown_cb_called;
52static int completed_pingers = 0;
53static int64_t start_time;
54
55
56static void buf_alloc(uv_handle_t* tcp, size_t size, uv_buf_t* buf) {
57  buf_t* ab;
58
59  ab = buf_freelist;
60  if (ab != NULL)
61    buf_freelist = ab->next;
62  else {
63    ab = malloc(size + sizeof(*ab));
64    ab->uv_buf_t.len = size;
65    ab->uv_buf_t.base = (char*) (ab + 1);
66  }
67
68  *buf = ab->uv_buf_t;
69}
70
71
72static void buf_free(const uv_buf_t* buf) {
73  buf_t* ab = (buf_t*) buf->base - 1;
74  ab->next = buf_freelist;
75  buf_freelist = ab;
76}
77
78
79static void pinger_close_cb(uv_handle_t* handle) {
80  pinger_t* pinger;
81
82  pinger = (pinger_t*)handle->data;
83  fprintf(stderr, "ping_pongs: %d roundtrips/s\n", (1000 * pinger->pongs) / TIME);
84  fflush(stderr);
85
86  free(pinger);
87
88  completed_pingers++;
89}
90
91
92static void pinger_write_cb(uv_write_t* req, int status) {
93  ASSERT(status == 0);
94
95  free(req);
96}
97
98
99static void pinger_write_ping(pinger_t* pinger) {
100  uv_write_t* req;
101  uv_buf_t buf;
102
103  buf = uv_buf_init(PING, sizeof(PING) - 1);
104
105  req = malloc(sizeof *req);
106  if (uv_write(req, (uv_stream_t*) &pinger->tcp, &buf, 1, pinger_write_cb)) {
107    FATAL("uv_write failed");
108  }
109}
110
111
112static void pinger_shutdown_cb(uv_shutdown_t* req, int status) {
113  ASSERT(status == 0);
114  pinger_shutdown_cb_called++;
115
116  /*
117   * The close callback has not been triggered yet. We must wait for EOF
118   * until we close the connection.
119   */
120  ASSERT(completed_pingers == 0);
121}
122
123
124static void pinger_read_cb(uv_stream_t* tcp,
125                           ssize_t nread,
126                           const uv_buf_t* buf) {
127  ssize_t i;
128  pinger_t* pinger;
129
130  pinger = (pinger_t*)tcp->data;
131
132  if (nread < 0) {
133    ASSERT(nread == UV_EOF);
134
135    if (buf->base) {
136      buf_free(buf);
137    }
138
139    ASSERT(pinger_shutdown_cb_called == 1);
140    uv_close((uv_handle_t*)tcp, pinger_close_cb);
141
142    return;
143  }
144
145  /* Now we count the pings */
146  for (i = 0; i < nread; i++) {
147    ASSERT(buf->base[i] == PING[pinger->state]);
148    pinger->state = (pinger->state + 1) % (sizeof(PING) - 1);
149    if (pinger->state == 0) {
150      pinger->pongs++;
151      if (uv_now(loop) - start_time > TIME) {
152        uv_shutdown(&pinger->shutdown_req,
153                    (uv_stream_t*) tcp,
154                    pinger_shutdown_cb);
155        break;
156      } else {
157        pinger_write_ping(pinger);
158      }
159    }
160  }
161
162  buf_free(buf);
163}
164
165
166static void pinger_connect_cb(uv_connect_t* req, int status) {
167  pinger_t *pinger = (pinger_t*)req->handle->data;
168
169  ASSERT(status == 0);
170
171  pinger_write_ping(pinger);
172
173  if (uv_read_start(req->handle, buf_alloc, pinger_read_cb)) {
174    FATAL("uv_read_start failed");
175  }
176}
177
178
179static void pinger_new(void) {
180  struct sockaddr_in client_addr;
181  struct sockaddr_in server_addr;
182  pinger_t *pinger;
183  int r;
184
185  ASSERT(0 == uv_ip4_addr("0.0.0.0", 0, &client_addr));
186  ASSERT(0 == uv_ip4_addr("127.0.0.1", TEST_PORT, &server_addr));
187  pinger = malloc(sizeof(*pinger));
188  pinger->state = 0;
189  pinger->pongs = 0;
190
191  /* Try to connect to the server and do NUM_PINGS ping-pongs. */
192  r = uv_tcp_init(loop, &pinger->tcp);
193  ASSERT(!r);
194
195  pinger->tcp.data = pinger;
196
197  ASSERT(0 == uv_tcp_bind(&pinger->tcp,
198                          (const struct sockaddr*) &client_addr,
199                          0));
200
201  r = uv_tcp_connect(&pinger->connect_req,
202                     &pinger->tcp,
203                     (const struct sockaddr*) &server_addr,
204                     pinger_connect_cb);
205  ASSERT(!r);
206}
207
208
209BENCHMARK_IMPL(ping_pongs) {
210  loop = uv_default_loop();
211
212  start_time = uv_now(loop);
213
214  pinger_new();
215  uv_run(loop, UV_RUN_DEFAULT);
216
217  ASSERT(completed_pingers == 1);
218
219  MAKE_VALGRIND_HAPPY();
220  return 0;
221}
222