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/*
* Copyright (C) 2022 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "HintSessionWrapper.h"
#include <dlfcn.h>
#include <private/performance_hint_private.h>
#include <utils/Log.h>
#include <algorithm>
#include <chrono>
#include <vector>
#include "../Properties.h"
#include "RenderThread.h"
#include "thread/CommonPool.h"
using namespace std::chrono_literals;
namespace android {
namespace uirenderer {
namespace renderthread {
#define BIND_APH_METHOD(name) \
name = (decltype(name))dlsym(handle_, "APerformanceHint_" #name); \
LOG_ALWAYS_FATAL_IF(name == nullptr, "Failed to find required symbol APerformanceHint_" #name)
void HintSessionWrapper::HintSessionBinding::init() {
if (mInitialized) return;
void* handle_ = dlopen("libandroid.so", RTLD_NOW | RTLD_NODELETE);
LOG_ALWAYS_FATAL_IF(handle_ == nullptr, "Failed to dlopen libandroid.so!");
BIND_APH_METHOD(getManager);
BIND_APH_METHOD(createSessionInternal);
BIND_APH_METHOD(closeSession);
BIND_APH_METHOD(updateTargetWorkDuration);
BIND_APH_METHOD(reportActualWorkDuration);
BIND_APH_METHOD(sendHint);
BIND_APH_METHOD(setThreads);
mInitialized = true;
}
HintSessionWrapper::HintSessionWrapper(pid_t uiThreadId, pid_t renderThreadId)
: mUiThreadId(uiThreadId)
, mRenderThreadId(renderThreadId)
, mBinding(std::make_shared<HintSessionBinding>()) {}
HintSessionWrapper::~HintSessionWrapper() {
destroy();
}
void HintSessionWrapper::destroy() {
if (mHintSessionFuture.has_value()) {
mHintSession = mHintSessionFuture->get();
mHintSessionFuture = std::nullopt;
}
if (mSetThreadsFuture.has_value()) {
mSetThreadsFuture->wait();
mSetThreadsFuture = std::nullopt;
}
if (mHintSession) {
mBinding->closeSession(mHintSession);
mSessionValid = true;
mHintSession = nullptr;
}
mResetsSinceLastReport = 0;
}
bool HintSessionWrapper::init() {
if (mHintSession != nullptr) return true;
// If we're waiting for the session
if (mHintSessionFuture.has_value()) {
// If the session is here
if (mHintSessionFuture->wait_for(0s) == std::future_status::ready) {
mHintSession = mHintSessionFuture->get();
mHintSessionFuture = std::nullopt;
if (mHintSession != nullptr) {
mSessionValid = true;
return true;
}
}
return false;
}
// If it broke last time we tried this, shouldn't be running, or
// has bad argument values, don't even bother
if (!mSessionValid || !Properties::useHintManager || !Properties::isDrawingEnabled() ||
mUiThreadId < 0 || mRenderThreadId < 0) {
return false;
}
// Assume that if we return before the end, it broke
mSessionValid = false;
mBinding->init();
APerformanceHintManager* manager = mBinding->getManager();
if (!manager) return false;
mPermanentSessionTids = CommonPool::getThreadIds();
mPermanentSessionTids.push_back(mUiThreadId);
mPermanentSessionTids.push_back(mRenderThreadId);
// Use the cached target value if there is one, otherwise use a default. This is to ensure
// the cached target and target in PowerHAL are consistent, and that it updates correctly
// whenever there is a change.
int64_t targetDurationNanos =
mLastTargetWorkDuration == 0 ? kDefaultTargetDuration : mLastTargetWorkDuration;
mHintSessionFuture = CommonPool::async([=, this, tids = mPermanentSessionTids] {
return mBinding->createSessionInternal(manager, tids.data(), tids.size(),
targetDurationNanos, SessionTag::HWUI);
});
return false;
}
void HintSessionWrapper::updateTargetWorkDuration(long targetWorkDurationNanos) {
if (!init()) return;
targetWorkDurationNanos = targetWorkDurationNanos * Properties::targetCpuTimePercentage / 100;
if (targetWorkDurationNanos != mLastTargetWorkDuration &&
targetWorkDurationNanos > kSanityCheckLowerBound &&
targetWorkDurationNanos < kSanityCheckUpperBound) {
mLastTargetWorkDuration = targetWorkDurationNanos;
mBinding->updateTargetWorkDuration(mHintSession, targetWorkDurationNanos);
}
mLastFrameNotification = systemTime();
}
void HintSessionWrapper::reportActualWorkDuration(long actualDurationNanos) {
if (!init()) return;
mResetsSinceLastReport = 0;
if (actualDurationNanos > kSanityCheckLowerBound &&
actualDurationNanos < kSanityCheckUpperBound) {
mBinding->reportActualWorkDuration(mHintSession, actualDurationNanos);
}
mLastFrameNotification = systemTime();
}
void HintSessionWrapper::setActiveFunctorThreads(std::vector<pid_t> threadIds) {
if (!init()) return;
if (!mBinding || !mHintSession) return;
// Sort the vector to make sure they're compared as sets.
std::sort(threadIds.begin(), threadIds.end());
if (threadIds == mActiveFunctorTids) return;
mActiveFunctorTids = std::move(threadIds);
std::vector<pid_t> combinedTids = mPermanentSessionTids;
std::copy(mActiveFunctorTids.begin(), mActiveFunctorTids.end(),
std::back_inserter(combinedTids));
mSetThreadsFuture = CommonPool::async([this, tids = std::move(combinedTids)] {
int ret = mBinding->setThreads(mHintSession, tids.data(), tids.size());
ALOGE_IF(ret != 0, "APerformaceHint_setThreads failed: %d", ret);
return ret;
});
}
void HintSessionWrapper::sendLoadResetHint() {
static constexpr int kMaxResetsSinceLastReport = 2;
if (!init()) return;
nsecs_t now = systemTime();
if (now - mLastFrameNotification > kResetHintTimeout &&
mResetsSinceLastReport <= kMaxResetsSinceLastReport) {
++mResetsSinceLastReport;
mBinding->sendHint(mHintSession, static_cast<int32_t>(SessionHint::CPU_LOAD_RESET));
}
mLastFrameNotification = now;
}
void HintSessionWrapper::sendLoadIncreaseHint() {
if (!init()) return;
mBinding->sendHint(mHintSession, static_cast<int32_t>(SessionHint::CPU_LOAD_UP));
}
bool HintSessionWrapper::alive() {
return mHintSession != nullptr;
}
nsecs_t HintSessionWrapper::getLastUpdate() {
return mLastFrameNotification;
}
// Requires passing in its shared_ptr since it shouldn't own a shared_ptr to itself
void HintSessionWrapper::delayedDestroy(RenderThread& rt, nsecs_t delay,
std::shared_ptr<HintSessionWrapper> wrapperPtr) {
nsecs_t lastUpdate = wrapperPtr->getLastUpdate();
rt.queue().postDelayed(delay, [lastUpdate = lastUpdate, wrapper = wrapperPtr]() mutable {
if (wrapper->getLastUpdate() == lastUpdate) {
wrapper->destroy();
}
// Ensure the shared_ptr is killed at the end of the method
wrapper = nullptr;
});
}
} /* namespace renderthread */
} /* namespace uirenderer */
} /* namespace android */
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