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1 /* Copyright libuv project contributors. All rights reserved.
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2 *
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3 * Permission is hereby granted, free of charge, to any person obtaining a copy
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4 * of this software and associated documentation files (the "Software"), to
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5 * deal in the Software without restriction, including without limitation the
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6 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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7 * sell copies of the Software, and to permit persons to whom the Software is
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8 * furnished to do so, subject to the following conditions:
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9 *
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10 * The above copyright notice and this permission notice shall be included in
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11 * all copies or substantial portions of the Software.
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12 *
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13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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18 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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19 * IN THE SOFTWARE.
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20 */
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21
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22 #include "uv.h"
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23 #include "task.h"
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24
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25 #include <stdlib.h>
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26 #include <stdio.h>
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27
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28 /* Run the benchmark for this many ms */
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29 #define TIME 5000
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30
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31 typedef struct {
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32 int pongs;
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33 int state;
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34 uv_udp_t udp;
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35 struct sockaddr_in server_addr;
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36 } pinger_t;
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37
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38 typedef struct buf_s {
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39 uv_buf_t uv_buf_t;
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40 struct buf_s* next;
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41 } buf_t;
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42
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43 static char PING[] = "PING\n";
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44
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45 static uv_loop_t* loop;
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46
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47 static int completed_pingers;
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48 static unsigned long completed_pings;
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49 static int64_t start_time;
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50
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51
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52 static void buf_alloc(uv_handle_t* tcp, size_t size, uv_buf_t* buf) {
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53 static char slab[64 * 1024];
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54 buf->base = slab;
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55 buf->len = sizeof(slab);
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56 }
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57
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58
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59 static void buf_free(const uv_buf_t* buf) {
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60 }
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61
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62
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63 static void pinger_close_cb(uv_handle_t* handle) {
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64 pinger_t* pinger;
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65
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66 pinger = (pinger_t*)handle->data;
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67 #if DEBUG
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68 fprintf(stderr, "ping_pongs: %d roundtrips/s\n",
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69 pinger->pongs / (TIME / 1000));
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70 #endif
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71
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72 completed_pings += pinger->pongs;
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73 completed_pingers++;
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74 free(pinger);
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75 }
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76
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77 static void pinger_write_ping(pinger_t* pinger) {
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78 uv_buf_t buf;
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79 int r;
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80
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81 buf = uv_buf_init(PING, sizeof(PING) - 1);
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82 r = uv_udp_try_send(&pinger->udp, &buf, 1,
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83 (const struct sockaddr*) &pinger->server_addr);
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84 if (r < 0)
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85 FATAL("uv_udp_send failed");
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86 }
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87
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88 static void pinger_read_cb(uv_udp_t* udp,
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89 ssize_t nread,
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90 const uv_buf_t* buf,
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91 const struct sockaddr* addr,
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92 unsigned flags) {
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93 ssize_t i;
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94 pinger_t* pinger;
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95 pinger = (pinger_t*)udp->data;
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96
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97 /* No data here means something went wrong */
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98 ASSERT_GT(nread, 0);
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99
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100 /* Now we count the pings */
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101 for (i = 0; i < nread; i++) {
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102 ASSERT_EQ(buf->base[i], PING[pinger->state]);
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103 pinger->state = (pinger->state + 1) % (sizeof(PING) - 1);
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104 if (pinger->state == 0) {
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105 pinger->pongs++;
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106 if (uv_now(loop) - start_time > TIME) {
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107 uv_close((uv_handle_t*)udp, pinger_close_cb);
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108 break;
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109 }
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110 pinger_write_ping(pinger);
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111 }
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112 }
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113
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114 if (buf && !(flags & UV_UDP_MMSG_CHUNK))
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115 buf_free(buf);
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116 }
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117
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118 static void udp_pinger_new(void) {
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119 pinger_t* pinger = malloc(sizeof(*pinger));
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120 int r;
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121
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122 ASSERT_OK(uv_ip4_addr("127.0.0.1", TEST_PORT, &pinger->server_addr));
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123 pinger->state = 0;
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124 pinger->pongs = 0;
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125
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126 /* Try to do NUM_PINGS ping-pongs (connection-less). */
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127 r = uv_udp_init(loop, &pinger->udp);
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128 ASSERT_OK(r);
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129 r = uv_udp_bind(&pinger->udp, (const struct sockaddr*) &pinger->server_addr, 0);
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130 ASSERT_OK(r);
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131
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132 pinger->udp.data = pinger;
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133
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134 /* Start pinging */
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135 if (0 != uv_udp_recv_start(&pinger->udp, buf_alloc, pinger_read_cb)) {
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136 FATAL("uv_udp_read_start failed");
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137 }
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138 pinger_write_ping(pinger);
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139 }
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140
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141 static int ping_udp(unsigned pingers) {
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142 unsigned i;
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143
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144 loop = uv_default_loop();
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145 start_time = uv_now(loop);
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146
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147 for (i = 0; i < pingers; ++i) {
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148 udp_pinger_new();
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149 }
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150 uv_run(loop, UV_RUN_DEFAULT);
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151 ASSERT_GE(completed_pingers, 1);
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152
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153 fprintf(stderr, "ping_pongs: %d pingers, ~ %lu roundtrips/s\n",
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154 completed_pingers, completed_pings / (TIME/1000));
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155
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156 MAKE_VALGRIND_HAPPY(loop);
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157 return 0;
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158 }
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159
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160 #define X(PINGERS) \
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161 BENCHMARK_IMPL(ping_udp##PINGERS) {\
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162 return ping_udp(PINGERS); \
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163 }
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164
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165 X(1)
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166 X(10)
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167 X(100)
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168
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169 #undef X
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