libuv-svace-build

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/* Copyright Joyent, Inc. and other Node 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 <stdio.h>
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#include <stdlib.h>
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#define NUM_THREADS (20 * 1000)
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static volatile int num_threads;
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static void thread_entry(void* arg) {
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  ASSERT_PTR_EQ(arg, (void *) 42);
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  num_threads++;
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  /* FIXME write barrier? */
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}
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BENCHMARK_IMPL(thread_create) {
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  uint64_t start_time;
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  double duration;
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  uv_thread_t tid;
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  int i, r;
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  start_time = uv_hrtime();
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  for (i = 0; i < NUM_THREADS; i++) {
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    r = uv_thread_create(&tid, thread_entry, (void *) 42);
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    ASSERT_OK(r);
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    r = uv_thread_join(&tid);
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    ASSERT_OK(r);
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  }
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  duration = (uv_hrtime() - start_time) / 1e9;
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  ASSERT_EQ(num_threads, NUM_THREADS);
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  printf("%d threads created in %.2f seconds (%.0f/s)\n",
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      NUM_THREADS, duration, NUM_THREADS / duration);
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  return 0;
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}
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