libuv-svace-build

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/* Copyright libuv project contributors. All rights reserved.
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 *
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 * Permission is hereby granted, free of charge, to any person obtaining a copy
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 * of this software and associated documentation files (the "Software"), to
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 * deal in the Software without restriction, including without limitation the
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 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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 * sell copies of the Software, and to permit persons to whom the Software is
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 * furnished to do so, subject to the following conditions:
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 *
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 * The above copyright notice and this permission notice shall be included in
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 * all copies or substantial portions of the Software.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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 * IN THE SOFTWARE.
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 */
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#include "uv.h"
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#include "task.h"
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#include <stdlib.h>
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#include <stdio.h>
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/* Run the benchmark for this many ms */
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#define TIME 5000
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typedef struct {
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  int pongs;
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  int state;
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  uv_udp_t udp;
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  struct sockaddr_in server_addr;
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} pinger_t;
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typedef struct buf_s {
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  uv_buf_t uv_buf_t;
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  struct buf_s* next;
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} buf_t;
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static char PING[] = "PING\n";
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static uv_loop_t* loop;
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static int completed_pingers;
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static unsigned long completed_pings;
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static int64_t start_time;
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static void buf_alloc(uv_handle_t* tcp, size_t size, uv_buf_t* buf) {
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  static char slab[64 * 1024];
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  buf->base = slab;
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  buf->len = sizeof(slab);
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}
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static void buf_free(const uv_buf_t* buf) {
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}
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static void pinger_close_cb(uv_handle_t* handle) {
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  pinger_t* pinger;
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  pinger = (pinger_t*)handle->data;
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#if DEBUG
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  fprintf(stderr, "ping_pongs: %d roundtrips/s\n",
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	  pinger->pongs / (TIME / 1000));
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#endif
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  completed_pings += pinger->pongs;
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  completed_pingers++;
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  free(pinger);
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}
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static void pinger_write_ping(pinger_t* pinger) {
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  uv_buf_t buf;
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  int r;
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  buf = uv_buf_init(PING, sizeof(PING) - 1);
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  r = uv_udp_try_send(&pinger->udp, &buf, 1,
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                      (const struct sockaddr*) &pinger->server_addr);
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  if (r < 0)
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    FATAL("uv_udp_send failed");
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}
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static void pinger_read_cb(uv_udp_t* udp,
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                           ssize_t nread,
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                           const uv_buf_t* buf,
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                           const struct sockaddr* addr,
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                           unsigned flags) {
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  ssize_t i;
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  pinger_t* pinger;
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  pinger = (pinger_t*)udp->data;
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  /* No data here means something went wrong */
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  ASSERT_GT(nread, 0);
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  /* Now we count the pings */
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  for (i = 0; i < nread; i++) {
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    ASSERT_EQ(buf->base[i], PING[pinger->state]);
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    pinger->state = (pinger->state + 1) % (sizeof(PING) - 1);
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    if (pinger->state == 0) {
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      pinger->pongs++;
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      if (uv_now(loop) - start_time > TIME) {
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        uv_close((uv_handle_t*)udp, pinger_close_cb);
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        break;
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      }
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      pinger_write_ping(pinger);
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    }
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  }
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  if (buf && !(flags & UV_UDP_MMSG_CHUNK))
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    buf_free(buf);
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}
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static void udp_pinger_new(void) {
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  pinger_t* pinger = malloc(sizeof(*pinger));
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  int r;
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  ASSERT_OK(uv_ip4_addr("127.0.0.1", TEST_PORT, &pinger->server_addr));
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  pinger->state = 0;
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  pinger->pongs = 0;
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  /* Try to do NUM_PINGS ping-pongs (connection-less). */
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  r = uv_udp_init(loop, &pinger->udp);
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  ASSERT_OK(r);
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  r = uv_udp_bind(&pinger->udp, (const struct sockaddr*) &pinger->server_addr, 0);
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  ASSERT_OK(r);
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  pinger->udp.data = pinger;
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  /* Start pinging */
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  if (0 != uv_udp_recv_start(&pinger->udp, buf_alloc, pinger_read_cb)) {
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    FATAL("uv_udp_read_start failed");
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  }
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  pinger_write_ping(pinger);
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}
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static int ping_udp(unsigned pingers) {
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  unsigned i;
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  loop = uv_default_loop();
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  start_time = uv_now(loop);
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  for (i = 0; i < pingers; ++i) {
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    udp_pinger_new();
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  }
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  uv_run(loop, UV_RUN_DEFAULT);
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  ASSERT_GE(completed_pingers, 1);
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  fprintf(stderr, "ping_pongs: %d pingers, ~ %lu roundtrips/s\n",
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          completed_pingers, completed_pings / (TIME/1000));
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  MAKE_VALGRIND_HAPPY(loop);
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  return 0;
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}
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#define X(PINGERS) \
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BENCHMARK_IMPL(ping_udp##PINGERS) {\
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  return ping_udp(PINGERS); \
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}
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X(1)
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X(10)
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X(100)
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#undef X
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