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/*
* Copyright (C) 2021 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.
*/
#pragma once
#include <inttypes.h>
#include <array>
#include <chrono>
#include <deque>
#include <random>
#include <vector>
#include "AdaptiveCpuConfig.h"
#include "CpuFrequencyReader.h"
#include "Device.h"
#include "ThrottleDecision.h"
#include "WorkDurationProcessor.h"
namespace aidl {
namespace google {
namespace hardware {
namespace power {
namespace impl {
namespace pixel {
// Currently Adaptive CPU is targeted to only raven/oriole, so we can hardcode the CPU architecture.
// If we extend to other architectures, this will have to vary per-device or be dynamically loaded.
constexpr uint32_t NUM_CPU_CORES = 8;
constexpr uint32_t NUM_CPU_POLICIES = 3;
constexpr std::array<uint32_t, NUM_CPU_POLICIES> CPU_POLICY_INDICES{0, 4, 6};
struct ModelInput {
std::array<double, NUM_CPU_POLICIES> cpuPolicyAverageFrequencyHz;
std::array<double, NUM_CPU_CORES> cpuCoreIdleTimesPercentage;
WorkDurationFeatures workDurationFeatures;
ThrottleDecision previousThrottleDecision;
Device device;
bool SetCpuFreqiencies(
const std::vector<CpuPolicyAverageFrequency> &cpuPolicyAverageFrequencies);
void LogToAtrace() const;
bool operator==(const ModelInput &other) const {
return cpuPolicyAverageFrequencyHz == other.cpuPolicyAverageFrequencyHz &&
cpuCoreIdleTimesPercentage == other.cpuCoreIdleTimesPercentage &&
workDurationFeatures == other.workDurationFeatures &&
previousThrottleDecision == other.previousThrottleDecision;
}
};
class Model {
public:
Model()
: mShouldRandomThrottleDistribution(0, 1),
mRandomThrottleDistribution(static_cast<uint32_t>(ThrottleDecision::FIRST),
static_cast<uint32_t>(ThrottleDecision::LAST)) {}
ThrottleDecision Run(const std::deque<ModelInput> &modelInputs,
const AdaptiveCpuConfig &config);
private:
std::default_random_engine mGenerator;
std::uniform_real_distribution<double> mShouldRandomThrottleDistribution;
std::uniform_int_distribution<uint32_t> mRandomThrottleDistribution;
ThrottleDecision RunDecisionTree(const std::deque<ModelInput> &modelInputs);
};
} // namespace pixel
} // namespace impl
} // namespace power
} // namespace hardware
} // namespace google
} // namespace aidl
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