c2b5ca99e3
from: 026342771c6642980cb4653b1ec4d857a5d8be54 Bug: 167996145 Change-Id: I2ebf7f019afed1cbe9b60dcd82581bd3a52fe109
90 lines
3.1 KiB
C++
90 lines
3.1 KiB
C++
/*
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* Copyright (C) 2020 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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#define LOG_TAG "libpixelpowerstats"
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#include "UfsStateResidencyDataProvider.h"
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#include <android-base/logging.h>
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#include <android-base/parseint.h>
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#include <android-base/strings.h>
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#include <string>
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#include <utility>
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using android::base::ParseUint;
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using android::base::Split;
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using android::base::StartsWith;
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using android::base::Trim;
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namespace android {
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namespace hardware {
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namespace google {
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namespace pixel {
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namespace powerstats {
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const uint32_t HIBERNATE_STATE_ID = 0;
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UfsStateResidencyDataProvider::UfsStateResidencyDataProvider(uint32_t powerEntityId)
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: mPowerEntityId(powerEntityId) {}
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bool UfsStateResidencyDataProvider::getResults(
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std::unordered_map<uint32_t, PowerEntityStateResidencyResult> &results) {
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PowerEntityStateResidencyResult result = {
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.powerEntityId = mPowerEntityId,
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.stateResidencyData = {{.powerEntityStateId = HIBERNATE_STATE_ID}}};
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// The transform function converts microseconds to milliseconds.
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std::function<uint64_t(uint64_t)> usecToMs = [](uint64_t a) { return a / 1000; };
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std::string prefix = "/sys/bus/platform/devices/14700000.ufs/ufs_stats/";
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result.stateResidencyData[0].totalTimeInStateMs =
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usecToMs(readStat(prefix + "hibern8_total_us"));
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result.stateResidencyData[0].totalStateEntryCount = readStat(prefix + "hibern8_exit_cnt");
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result.stateResidencyData[0].lastEntryTimestampMs =
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usecToMs(readStat(prefix + "last_hibern8_enter_time"));
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results.insert(std::make_pair(mPowerEntityId, result));
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return true;
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}
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std::vector<PowerEntityStateSpace> UfsStateResidencyDataProvider::getStateSpaces() {
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return {{.powerEntityId = mPowerEntityId,
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.states = {{.powerEntityStateId = HIBERNATE_STATE_ID,
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.powerEntityStateName = "HIBERN8"}}}};
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}
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uint64_t UfsStateResidencyDataProvider::readStat(std::string path) {
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std::unique_ptr<FILE, decltype(&fclose)> fp(fopen(path.c_str(), "r"), fclose);
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if (!fp) {
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PLOG(ERROR) << __func__ << ":Failed to open file " << path
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<< " Error = " << strerror(errno);
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return 0;
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}
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const size_t size = 20;
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char buf[size];
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(void)fread(&buf, sizeof(char), size, fp.get());
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uint64_t ret;
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if (!ParseUint(Trim(std::string(buf)), &ret)) {
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LOG(ERROR) << "Failed to parse uint64 from [" << std::string(buf) << "]";
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}
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return ret;
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}
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} // namespace powerstats
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} // namespace pixel
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} // namespace google
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} // namespace hardware
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} // namespace android
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