mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2024-11-23 04:09:40 +00:00
104 lines
3.1 KiB
C++
104 lines
3.1 KiB
C++
/*
|
|
* Copyright (C) 2016 Apple Inc. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
|
|
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
|
|
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
|
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
|
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
|
|
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include "config.h"
|
|
#include "SuperSampler.h"
|
|
|
|
#include "Options.h"
|
|
#include <wtf/DataLog.h>
|
|
#include <wtf/Lock.h>
|
|
#include <wtf/Threading.h>
|
|
|
|
namespace JSC {
|
|
|
|
volatile uint32_t g_superSamplerCount;
|
|
volatile bool g_superSamplerEnabled;
|
|
|
|
static Lock lock;
|
|
static double in;
|
|
static double out;
|
|
|
|
void initializeSuperSampler()
|
|
{
|
|
if (!Options::useSuperSampler())
|
|
return;
|
|
|
|
Thread::create(
|
|
"JSC Super Sampler",
|
|
[] () {
|
|
const int sleepQuantum = 3;
|
|
const int printingPeriod = 3000;
|
|
for (;;) {
|
|
for (int ms = 0; ms < printingPeriod; ms += sleepQuantum) {
|
|
if (g_superSamplerEnabled) {
|
|
LockHolder locker(lock);
|
|
if (g_superSamplerCount)
|
|
in++;
|
|
else
|
|
out++;
|
|
}
|
|
sleep(Seconds::fromMilliseconds(sleepQuantum));
|
|
}
|
|
printSuperSamplerState();
|
|
if (static_cast<int32_t>(g_superSamplerCount) < 0)
|
|
dataLog("WARNING: Super sampler undercount detected!\n");
|
|
}
|
|
});
|
|
}
|
|
|
|
void resetSuperSamplerState()
|
|
{
|
|
LockHolder locker(lock);
|
|
in = 0;
|
|
out = 0;
|
|
}
|
|
|
|
void printSuperSamplerState()
|
|
{
|
|
if (!Options::useSuperSampler())
|
|
return;
|
|
|
|
LockHolder locker(lock);
|
|
double percentage = 100.0 * in / (in + out);
|
|
if (percentage != percentage)
|
|
percentage = 0.0;
|
|
dataLog("Percent time behind super sampler flag: ", percentage, "\n");
|
|
}
|
|
|
|
void enableSuperSampler()
|
|
{
|
|
LockHolder locker(lock);
|
|
g_superSamplerEnabled = true;
|
|
}
|
|
|
|
void disableSuperSampler()
|
|
{
|
|
LockHolder locker(lock);
|
|
g_superSamplerEnabled = false;
|
|
}
|
|
|
|
} // namespace JSC
|
|
|