64 lines
1.9 KiB
C++
64 lines
1.9 KiB
C++
#pragma once
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/*
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* Copyright (C) 2021 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <map>
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#include "ICpuLoadReader.h"
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#include "IFilesystem.h"
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#include "RealFilesystem.h"
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namespace aidl {
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namespace google {
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namespace hardware {
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namespace power {
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namespace impl {
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namespace pixel {
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struct CpuTime {
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uint64_t idleTimeMs;
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uint64_t totalTimeMs;
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};
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// Reads CPU idle stats from /proc/stat.
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class CpuLoadReaderProcStat : public ICpuLoadReader {
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public:
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CpuLoadReaderProcStat() : mFilesystem(std::make_unique<RealFilesystem>()) {}
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CpuLoadReaderProcStat(std::unique_ptr<IFilesystem> filesystem)
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: mFilesystem(std::move(filesystem)) {}
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bool Init() override;
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bool GetRecentCpuLoads(std::array<double, NUM_CPU_CORES> *cpuCoreIdleTimesPercentage) override;
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void DumpToStream(std::stringstream &stream) const override;
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private:
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std::map<uint32_t, CpuTime> mPreviousCpuTimes;
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const std::unique_ptr<IFilesystem> mFilesystem;
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bool ReadCpuTimes(std::map<uint32_t, CpuTime> *result);
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// Converts jiffies to milliseconds. Jiffies is the granularity the kernel reports times in,
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// including the timings in CPU statistics.
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static uint64_t JiffiesToMs(uint64_t jiffies);
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};
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} // namespace pixel
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} // namespace impl
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} // namespace power
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} // namespace hardware
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} // namespace google
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} // namespace aidl
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