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/*
* Copyright (C) 2017 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. AND ITS CONTRIBUTORS ``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 ITS 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 "PerActivityStateCPUUsageSampler.h"
#include "Logging.h"
#include "WebProcessPool.h"
#include "WebProcessProxy.h"
#include <WebCore/DiagnosticLoggingKeys.h>
#include <wtf/DecimalNumber.h>
namespace WebKit {
static const int64_t microsecondsPerSecond = 1000000;
using namespace WebCore;
static const std::chrono::minutes loggingInterval { 60 };
PerActivityStateCPUUsageSampler::PerActivityStateCPUUsageSampler(WebProcessPool& processPool)
: m_processPool(processPool)
, m_loggingTimer(RunLoop::main(), this, &PerActivityStateCPUUsageSampler::loggingTimerFired)
{
m_lastCPUTime = monotonicallyIncreasingTime();
m_loggingTimer.startRepeating(loggingInterval);
}
PerActivityStateCPUUsageSampler::~PerActivityStateCPUUsageSampler()
{
}
void PerActivityStateCPUUsageSampler::reportWebContentCPUTime(int64_t cpuTime, ActivityStateForCPUSampling activityState)
{
auto result = m_cpuTimeInActivityState.add(activityState, cpuTime);
if (!result.isNewEntry)
result.iterator->value += cpuTime;
}
static inline String loggingKeyForActivityState(ActivityStateForCPUSampling state)
{
switch (state) {
case ActivityStateForCPUSampling::NonVisible:
return DiagnosticLoggingKeys::nonVisibleStateKey();
case ActivityStateForCPUSampling::VisibleNonActive:
return DiagnosticLoggingKeys::visibleNonActiveStateKey();
case ActivityStateForCPUSampling::VisibleAndActive:
return DiagnosticLoggingKeys::visibleAndActiveStateKey();
}
}
void PerActivityStateCPUUsageSampler::loggingTimerFired()
{
auto* page = pageForLogging();
if (!page) {
m_cpuTimeInActivityState.clear();
return;
}
double currentCPUTime = monotonicallyIncreasingTime();
int64_t cpuTimeDelta = (currentCPUTime - m_lastCPUTime) * microsecondsPerSecond;
for (auto& pair : m_cpuTimeInActivityState) {
double cpuUsage = static_cast<double>(pair.value * 100.) / cpuTimeDelta;
String activityStateKey = loggingKeyForActivityState(pair.key);
page->logDiagnosticMessageWithValue(DiagnosticLoggingKeys::cpuUsageKey(), activityStateKey, cpuUsage, 2, ShouldSample::No);
RELEASE_LOG(PerformanceLogging, "WebContent processes used %.1f%% CPU in %s state", cpuUsage, activityStateKey.utf8().data());
}
m_cpuTimeInActivityState.clear();
m_lastCPUTime = currentCPUTime;
}
WebPageProxy* PerActivityStateCPUUsageSampler::pageForLogging() const
{
for (auto& webProcess : m_processPool.processes()) {
if (!webProcess->pageCount())
continue;
return *webProcess->pages().begin();
}
return nullptr;
}
} // namespace WebKit
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