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