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      1 /* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
      2  *
      3  * Permission is hereby granted, free of charge, to any person obtaining a copy
      4  * of this software and associated documentation files (the "Software"), to
      5  * deal in the Software without restriction, including without limitation the
      6  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
      7  * sell copies of the Software, and to permit persons to whom the Software is
      8  * furnished to do so, subject to the following conditions:
      9  *
     10  * The above copyright notice and this permission notice shall be included in
     11  * all copies or substantial portions of the Software.
     12  *
     13  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     14  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     15  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
     16  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     17  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
     18  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
     19  * IN THE SOFTWARE.
     20  */
     21 
     22 #include "task.h"
     23 #include "uv.h"
     24 
     25 struct async_container {
     26   unsigned async_events;
     27   unsigned handles_seen;
     28   uv_async_t async_handles[1024 * 1024];
     29 };
     30 
     31 static volatile int done;
     32 static uv_thread_t thread_id;
     33 static struct async_container* container;
     34 
     35 
     36 static unsigned fastrand(void) {
     37   static unsigned g = 0;
     38   g = g * 214013 + 2531011;
     39   return g;
     40 }
     41 
     42 
     43 static void thread_cb(void* arg) {
     44   unsigned i;
     45 
     46   while (done == 0) {
     47     i = fastrand() % ARRAY_SIZE(container->async_handles);
     48     uv_async_send(container->async_handles + i);
     49   }
     50 }
     51 
     52 
     53 static void async_cb(uv_async_t* handle) {
     54   container->async_events++;
     55   handle->data = handle;
     56 }
     57 
     58 
     59 static void timer_cb(uv_timer_t* handle) {
     60   unsigned i;
     61 
     62   done = 1;
     63   ASSERT(0 == uv_thread_join(&thread_id));
     64 
     65   for (i = 0; i < ARRAY_SIZE(container->async_handles); i++) {
     66     uv_async_t* handle = container->async_handles + i;
     67 
     68     if (handle->data != NULL)
     69       container->handles_seen++;
     70 
     71     uv_close((uv_handle_t*) handle, NULL);
     72   }
     73 
     74   uv_close((uv_handle_t*) handle, NULL);
     75 }
     76 
     77 
     78 BENCHMARK_IMPL(million_async) {
     79   uv_timer_t timer_handle;
     80   uv_async_t* handle;
     81   uv_loop_t* loop;
     82   int timeout;
     83   unsigned i;
     84 
     85   loop = uv_default_loop();
     86   timeout = 5000;
     87 
     88   container = malloc(sizeof(*container));
     89   ASSERT_NOT_NULL(container);
     90   container->async_events = 0;
     91   container->handles_seen = 0;
     92 
     93   for (i = 0; i < ARRAY_SIZE(container->async_handles); i++) {
     94     handle = container->async_handles + i;
     95     ASSERT(0 == uv_async_init(loop, handle, async_cb));
     96     handle->data = NULL;
     97   }
     98 
     99   ASSERT(0 == uv_timer_init(loop, &timer_handle));
    100   ASSERT(0 == uv_timer_start(&timer_handle, timer_cb, timeout, 0));
    101   ASSERT(0 == uv_thread_create(&thread_id, thread_cb, NULL));
    102   ASSERT(0 == uv_run(loop, UV_RUN_DEFAULT));
    103   printf("%s async events in %.1f seconds (%s/s, %s unique handles seen)\n",
    104           fmt(container->async_events),
    105           timeout / 1000.,
    106           fmt(container->async_events / (timeout / 1000.)),
    107           fmt(container->handles_seen));
    108   free(container);
    109 
    110   MAKE_VALGRIND_HAPPY();
    111   return 0;
    112 }
    113