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/* Copyright Joyent, Inc. and other Node 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 "task.h"
#include "uv.h"
#include <stdio.h>
#include <stdlib.h>
#define NUM_PINGS (1000 * 1000)
struct ctx {
uv_loop_t loop;
uv_thread_t thread;
uv_async_t main_async; /* wake up main thread */
uv_async_t worker_async; /* wake up worker */
unsigned int nthreads;
unsigned int main_sent;
unsigned int main_seen;
unsigned int worker_sent;
unsigned int worker_seen;
};
static void worker_async_cb(uv_async_t* handle) {
struct ctx* ctx = container_of(handle, struct ctx, worker_async);
ASSERT(0 == uv_async_send(&ctx->main_async));
ctx->worker_sent++;
ctx->worker_seen++;
if (ctx->worker_sent >= NUM_PINGS)
uv_close((uv_handle_t*) &ctx->worker_async, NULL);
}
static void main_async_cb(uv_async_t* handle) {
struct ctx* ctx = container_of(handle, struct ctx, main_async);
ASSERT(0 == uv_async_send(&ctx->worker_async));
ctx->main_sent++;
ctx->main_seen++;
if (ctx->main_sent >= NUM_PINGS)
uv_close((uv_handle_t*) &ctx->main_async, NULL);
}
static void worker(void* arg) {
struct ctx* ctx = arg;
ASSERT(0 == uv_async_send(&ctx->main_async));
ASSERT(0 == uv_run(&ctx->loop, UV_RUN_DEFAULT));
uv_loop_close(&ctx->loop);
}
static int test_async(int nthreads) {
struct ctx* threads;
struct ctx* ctx;
uint64_t time;
int i;
threads = calloc(nthreads, sizeof(threads[0]));
ASSERT(threads != NULL);
for (i = 0; i < nthreads; i++) {
ctx = threads + i;
ctx->nthreads = nthreads;
ASSERT(0 == uv_loop_init(&ctx->loop));
ASSERT(0 == uv_async_init(&ctx->loop, &ctx->worker_async, worker_async_cb));
ASSERT(0 == uv_async_init(uv_default_loop(),
&ctx->main_async,
main_async_cb));
ASSERT(0 == uv_thread_create(&ctx->thread, worker, ctx));
}
time = uv_hrtime();
ASSERT(0 == uv_run(uv_default_loop(), UV_RUN_DEFAULT));
for (i = 0; i < nthreads; i++)
ASSERT(0 == uv_thread_join(&threads[i].thread));
time = uv_hrtime() - time;
for (i = 0; i < nthreads; i++) {
ctx = threads + i;
ASSERT(ctx->worker_sent == NUM_PINGS);
ASSERT(ctx->worker_seen == NUM_PINGS);
ASSERT(ctx->main_sent == (unsigned int) NUM_PINGS);
ASSERT(ctx->main_seen == (unsigned int) NUM_PINGS);
}
printf("async%d: %.2f sec (%s/sec)\n",
nthreads,
time / 1e9,
fmt(NUM_PINGS / (time / 1e9)));
free(threads);
MAKE_VALGRIND_HAPPY();
return 0;
}
BENCHMARK_IMPL(async1) {
return test_async(1);
}
BENCHMARK_IMPL(async2) {
return test_async(2);
}
BENCHMARK_IMPL(async4) {
return test_async(4);
}
BENCHMARK_IMPL(async8) {
return test_async(8);
}