Skip to content
This repository has been archived by the owner on May 4, 2018. It is now read-only.

Commit

Permalink
Browse files Browse the repository at this point in the history
bench: add lots-of-timers benchmark
  • Loading branch information
bnoordhuis committed Jun 9, 2012
1 parent c92788e commit 0ae026d
Show file tree
Hide file tree
Showing 3 changed files with 68 additions and 0 deletions.
2 changes: 2 additions & 0 deletions test/benchmark-list.h
Expand Up @@ -46,6 +46,7 @@ BENCHMARK_DECLARE (gethostbyname)
BENCHMARK_DECLARE (getaddrinfo)
BENCHMARK_DECLARE (spawn)
BENCHMARK_DECLARE (thread_create)
BENCHMARK_DECLARE (million_timers)
HELPER_DECLARE (tcp4_blackhole_server)
HELPER_DECLARE (tcp_pump_server)
HELPER_DECLARE (pipe_pump_server)
Expand Down Expand Up @@ -106,4 +107,5 @@ TASK_LIST_START

BENCHMARK_ENTRY (spawn)
BENCHMARK_ENTRY (thread_create)
BENCHMARK_ENTRY (million_timers)
TASK_LIST_END
65 changes: 65 additions & 0 deletions test/benchmark-million-timers.c
@@ -0,0 +1,65 @@
/* 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"

#define NUM_TIMERS (1000 * 1000)

static int timer_cb_called;


static void timer_cb(uv_timer_t* handle, int status) {
timer_cb_called++;
}


BENCHMARK_IMPL(million_timers) {
uv_timer_t* timers;
uv_loop_t* loop;
uint64_t before;
uint64_t after;
int timeout;
int i;

timers = malloc(NUM_TIMERS * sizeof(timers[0]));
ASSERT(timers != NULL);

loop = uv_default_loop();
timeout = 0;

for (i = 0; i < NUM_TIMERS; i++) {
if (i % 1000 == 0) timeout++;
ASSERT(0 == uv_timer_init(loop, timers + i));
ASSERT(0 == uv_timer_start(timers + i, timer_cb, timeout, 0));
}

before = uv_hrtime();
ASSERT(0 == uv_run(loop));
after = uv_hrtime();

ASSERT(timer_cb_called == NUM_TIMERS);
free(timers);

LOGF("%.2f seconds\n", (after - before) / 1e9);

return 0;
}
1 change: 1 addition & 0 deletions uv.gyp
Expand Up @@ -404,6 +404,7 @@
'test/benchmark-getaddrinfo.c',
'test/benchmark-list.h',
'test/benchmark-loop-count.c',
'test/benchmark-million-timers.c',
'test/benchmark-ping-pongs.c',
'test/benchmark-pound.c',
'test/benchmark-pump.c',
Expand Down

1 comment on commit 0ae026d

@bnoordhuis
Copy link
Contributor Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Interestingly, this benchmark scores better with debug builds. In debug mode, nearly all timers miss their deadline so the test ends up doing way less syscalls (2-3 instead of ~50 in release builds).

Please sign in to comment.