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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
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* See the License for the specific language governing permissions and
* limitations under the License.
#pragma once
#include <android-base/chrono_utils.h>
#include <chrono>
#include <queue>
#include <shared_mutex>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include "thermal_info.h"
namespace aidl {
namespace android {
namespace hardware {
namespace thermal {
namespace implementation {
using ::android::base::boot_clock;
struct PowerSample {
uint64_t energy_counter;
uint64_t duration;
struct PowerStatus {
boot_clock::time_point last_update_time;
// A vector to record the queues of power sample history.
std::vector<std::queue<PowerSample>> power_history;
float last_updated_avg_power;
struct PowerStatusLog {
boot_clock::time_point prev_log_time;
// energy sample at last logging
std::unordered_map<std::string, PowerSample> prev_energy_info_map;
// A helper class for monitoring power rails.
class PowerFiles {
PowerFiles() = default;
~PowerFiles() = default;
// Disallow copy and assign.
PowerFiles(const PowerFiles &) = delete;
void operator=(const PowerFiles &) = delete;
bool registerPowerRailsToWatch(const Json::Value &config);
// Update the power data from ODPM sysfs
bool refreshPowerStatus(void);
// Log the power data for the duration
void logPowerStatus(const boot_clock::time_point &now);
// Get previous power log time_point
const boot_clock::time_point &GetPrevPowerLogTime() const {
return power_status_log_.prev_log_time;
// Get power status map
const std::unordered_map<std::string, PowerStatus> &GetPowerStatusMap() const {
std::shared_lock<std::shared_mutex> _lock(power_status_map_mutex_);
return power_status_map_;
// Get power rail info map
const std::unordered_map<std::string, PowerRailInfo> &GetPowerRailInfoMap() const {
return power_rail_info_map_;
// Update energy value to energy_info_map_, return false if the value is failed to update.
bool updateEnergyValues(void);
// Compute the average power for physical power rail.
float updateAveragePower(std::string_view power_rail, std::queue<PowerSample> *power_history);
// Update the power data for the target power rail.
float updatePowerRail(std::string_view power_rail);
// Find the energy source path, return false if no energy source found.
bool findEnergySourceToWatch(void);
// The map to record the energy counter for each power rail.
std::unordered_map<std::string, PowerSample> energy_info_map_;
// The map to record the power data for each thermal sensor.
std::unordered_map<std::string, PowerStatus> power_status_map_;
mutable std::shared_mutex power_status_map_mutex_;
// The map to record the power rail information from thermal config
std::unordered_map<std::string, PowerRailInfo> power_rail_info_map_;
// The set to store the energy source paths
std::unordered_set<std::string> energy_path_set_;
PowerStatusLog power_status_log_;
} // namespace implementation
} // namespace thermal
} // namespace hardware
} // namespace android
} // namespace aidl