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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 <chrono>
#include <vector>
#include "../Properties.h"
#include "thread/CommonPool.h"
using namespace std::chrono_literals;
namespace android {
namespace uirenderer {
namespace renderthread {
namespace {
typedef APerformanceHintManager* (*APH_getManager)();
typedef APerformanceHintSession* (*APH_createSession)(APerformanceHintManager*, const int32_t*,
size_t, int64_t);
typedef void (*APH_closeSession)(APerformanceHintSession* session);
typedef void (*APH_updateTargetWorkDuration)(APerformanceHintSession*, int64_t);
typedef void (*APH_reportActualWorkDuration)(APerformanceHintSession*, int64_t);
typedef void (*APH_sendHint)(APerformanceHintSession* session, int32_t);
bool gAPerformanceHintBindingInitialized = false;
APH_getManager gAPH_getManagerFn = nullptr;
APH_createSession gAPH_createSessionFn = nullptr;
APH_closeSession gAPH_closeSessionFn = nullptr;
APH_updateTargetWorkDuration gAPH_updateTargetWorkDurationFn = nullptr;
APH_reportActualWorkDuration gAPH_reportActualWorkDurationFn = nullptr;
APH_sendHint gAPH_sendHintFn = nullptr;
void ensureAPerformanceHintBindingInitialized() {
if (gAPerformanceHintBindingInitialized) return;
void* handle_ = dlopen("libandroid.so", RTLD_NOW | RTLD_NODELETE);
LOG_ALWAYS_FATAL_IF(handle_ == nullptr, "Failed to dlopen libandroid.so!");
gAPH_getManagerFn = (APH_getManager)dlsym(handle_, "APerformanceHint_getManager");
LOG_ALWAYS_FATAL_IF(gAPH_getManagerFn == nullptr,
"Failed to find required symbol APerformanceHint_getManager!");
gAPH_createSessionFn = (APH_createSession)dlsym(handle_, "APerformanceHint_createSession");
LOG_ALWAYS_FATAL_IF(gAPH_createSessionFn == nullptr,
"Failed to find required symbol APerformanceHint_createSession!");
gAPH_closeSessionFn = (APH_closeSession)dlsym(handle_, "APerformanceHint_closeSession");
LOG_ALWAYS_FATAL_IF(gAPH_closeSessionFn == nullptr,
"Failed to find required symbol APerformanceHint_closeSession!");
gAPH_updateTargetWorkDurationFn = (APH_updateTargetWorkDuration)dlsym(
handle_, "APerformanceHint_updateTargetWorkDuration");
LOG_ALWAYS_FATAL_IF(
gAPH_updateTargetWorkDurationFn == nullptr,
"Failed to find required symbol APerformanceHint_updateTargetWorkDuration!");
gAPH_reportActualWorkDurationFn = (APH_reportActualWorkDuration)dlsym(
handle_, "APerformanceHint_reportActualWorkDuration");
LOG_ALWAYS_FATAL_IF(
gAPH_reportActualWorkDurationFn == nullptr,
"Failed to find required symbol APerformanceHint_reportActualWorkDuration!");
gAPH_sendHintFn = (APH_sendHint)dlsym(handle_, "APerformanceHint_sendHint");
LOG_ALWAYS_FATAL_IF(gAPH_sendHintFn == nullptr,
"Failed to find required symbol APerformanceHint_sendHint!");
gAPerformanceHintBindingInitialized = true;
}
} // namespace
HintSessionWrapper::HintSessionWrapper(pid_t uiThreadId, pid_t renderThreadId)
: mUiThreadId(uiThreadId), mRenderThreadId(renderThreadId) {}
HintSessionWrapper::~HintSessionWrapper() {
destroy();
}
void HintSessionWrapper::destroy() {
if (mHintSessionFuture.valid()) {
mHintSession = mHintSessionFuture.get();
}
if (mHintSession) {
gAPH_closeSessionFn(mHintSession);
mSessionValid = true;
mHintSession = nullptr;
}
}
bool HintSessionWrapper::init() {
if (mHintSession != nullptr) return true;
// If we're waiting for the session
if (mHintSessionFuture.valid()) {
// If the session is here
if (mHintSessionFuture.wait_for(0s) == std::future_status::ready) {
mHintSession = mHintSessionFuture.get();
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;
ensureAPerformanceHintBindingInitialized();
APerformanceHintManager* manager = gAPH_getManagerFn();
if (!manager) return false;
std::vector<pid_t> tids = CommonPool::getThreadIds();
tids.push_back(mUiThreadId);
tids.push_back(mRenderThreadId);
// Use a placeholder target value to initialize,
// this will always be replaced elsewhere before it gets used
int64_t defaultTargetDurationNanos = 16666667;
mHintSessionFuture = CommonPool::async([=, tids = std::move(tids)] {
return gAPH_createSessionFn(manager, tids.data(), tids.size(), defaultTargetDurationNanos);
});
return false;
}
void HintSessionWrapper::updateTargetWorkDuration(long targetWorkDurationNanos) {
if (!init()) return;
targetWorkDurationNanos = targetWorkDurationNanos * Properties::targetCpuTimePercentage / 100;
if (targetWorkDurationNanos != mLastTargetWorkDuration &&
targetWorkDurationNanos > kSanityCheckLowerBound &&
targetWorkDurationNanos < kSanityCheckUpperBound) {
mLastTargetWorkDuration = targetWorkDurationNanos;
gAPH_updateTargetWorkDurationFn(mHintSession, targetWorkDurationNanos);
}
mLastFrameNotification = systemTime();
}
void HintSessionWrapper::reportActualWorkDuration(long actualDurationNanos) {
if (!init()) return;
mResetsSinceLastReport = 0;
if (actualDurationNanos > kSanityCheckLowerBound &&
actualDurationNanos < kSanityCheckUpperBound) {
gAPH_reportActualWorkDurationFn(mHintSession, actualDurationNanos);
}
}
void HintSessionWrapper::sendLoadResetHint() {
static constexpr int kMaxResetsSinceLastReport = 2;
if (!init()) return;
nsecs_t now = systemTime();
if (now - mLastFrameNotification > kResetHintTimeout &&
mResetsSinceLastReport <= kMaxResetsSinceLastReport) {
++mResetsSinceLastReport;
gAPH_sendHintFn(mHintSession, static_cast<int>(SessionHint::CPU_LOAD_RESET));
}
mLastFrameNotification = now;
}
void HintSessionWrapper::sendLoadIncreaseHint() {
if (!init()) return;
gAPH_sendHintFn(mHintSession, static_cast<int>(SessionHint::CPU_LOAD_UP));
}
} /* namespace renderthread */
} /* namespace uirenderer */
} /* namespace android */
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