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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
/* eslint-env node */
/* eslint-disable mozilla/avoid-Date-timing */
const os = require("os");
const path = require("path");
const fs = require("fs");
const usbPowerProfiler = require(path.join(
process.env.BROWSERTIME_ROOT,
"node_modules",
"usb-power-profiling",
"usb-power-profiling.js"
));
const {
gatherWindowsPowerUsage,
getBrowsertimeResultsPath,
startWindowsPowerProfiling,
stopWindowsPowerProfiling,
} = require("./profiling");
class SupportMeasurements {
constructor(context, commands, measureCPU, measurePower, measureTime) {
this.context = context;
this.commands = commands;
this.testTimes = [];
this.isWindows11 =
os.type() == "Windows_NT" && /10.0.2[2-9]/.test(os.release());
this.isAndroid =
context.options.android && context.options.android.enabled == "true";
this.application = context.options.browser;
if (this.isAndroid) {
if (this.application == "firefox") {
this.androidPackage = this.context.options.firefox.android.package;
} else {
this.androidPackage = this.context.options.chrome.android.package;
}
}
this.measurementMap = {
cpuTime: {
run: measureCPU,
start: "_startMeasureCPU",
stop: "_stopMeasureCPU",
finalize: null,
},
powerUsageSupport: {
run: measurePower,
start: "_startMeasurePower",
stop: "_stopMeasurePower",
finalize: "_finalizeMeasurePower",
},
"wallclock-for-tracking-only": {
run: measureTime,
start: "_startMeasureTime",
stop: "_stopMeasureTime",
finalize: null,
},
};
}
async _gatherAndroidCPUTimes() {
this.processIDs = await this.commands.android.shell(
`pgrep -f "${this.androidPackage}"`
);
let processTimes = {};
for (let processID of this.processIDs.split("\n")) {
let processTimeInfo = (
await this.commands.android.shell(`ps -p ${processID} -o name=,time=`)
).trim();
if (!processTimeInfo) {
// Sometimes a processID returns empty info
continue;
}
let nameAndTime = processTimeInfo.split(" ");
nameAndTime.forEach(el => el.trim());
let hmsTime = nameAndTime[nameAndTime.length - 1].split(":");
processTimes[nameAndTime[0]] =
parseInt(hmsTime[0], 10) * 60 * 60 +
parseInt(hmsTime[1], 10) * 60 +
parseInt(hmsTime[2], 10);
}
return processTimes;
}
async _startMeasureCPU() {
this.context.log.info("Starting CPU Time measurements");
if (!this.isAndroid) {
this.startCPUTimes = os.cpus().map(c => c.times);
} else {
this.startCPUTimes = await this._gatherAndroidCPUTimes();
}
}
async _stopMeasureCPU(measurementName) {
let totalTime = 0;
if (!this.isAndroid) {
let endCPUTimes = os.cpus().map(c => c.times);
totalTime = endCPUTimes
.map(
(times, i) =>
times.user -
this.startCPUTimes[i].user +
(times.sys - this.startCPUTimes[i].sys)
)
.reduce((currSum, val) => currSum + val, 0);
} else {
let endCPUTimes = await this._gatherAndroidCPUTimes();
for (let processName in endCPUTimes) {
if (Object.hasOwn(this.startCPUTimes, processName)) {
totalTime +=
endCPUTimes[processName] - this.startCPUTimes[processName];
} else {
// Assumes that the process was started during the test
totalTime += endCPUTimes[processName];
}
}
// Convert to ms
totalTime = totalTime * 1000;
}
this.context.log.info(`Total CPU time: ${totalTime}ms`);
this.commands.measure.addObject({
[measurementName]: [totalTime],
});
}
async _startMeasurePower() {
this.context.log.info("Starting power usage measurements");
if (this.isAndroid) {
await usbPowerProfiler.startSampling();
} else if (this.isWindows11) {
await startWindowsPowerProfiling(this.context.index);
}
this.startPowerTime = Date.now();
}
async _stopMeasurePower(measurementName) {
this.context.log.info("Taking power usage measurements");
if (this.isAndroid) {
let powerUsageData = await usbPowerProfiler.getPowerData(
this.startPowerTime,
Date.now()
);
let powerUsage = powerUsageData[0].samples.data.reduce(
(currSum, currVal) => currSum + Number.parseInt(currVal[1]),
0
);
await usbPowerProfiler.stopSampling();
const powerProfile = await usbPowerProfiler.profileFromData();
const browsertimeResultsPath = await getBrowsertimeResultsPath(
this.context,
this.commands,
true
);
const data = JSON.stringify(powerProfile, undefined, 2);
await fs.promises.writeFile(
path.join(
browsertimeResultsPath,
`profile_power_${this.context.index}.json`
),
data
);
this.commands.measure.addObject({
[measurementName]: [powerUsage],
});
} else if (this.isWindows11) {
this.testTimes.push([this.startPowerTime, Date.now()]);
}
}
async _finalizeMeasurePower() {
this.context.log.info("Finalizing power usage measurements");
if (this.isWindows11) {
await stopWindowsPowerProfiling();
let powerData = await gatherWindowsPowerUsage(this.testTimes);
powerData.forEach((powerUsage, ind) => {
if (!this.commands.measure.result[ind].extras.powerUsageSupport) {
this.commands.measure.result[ind].extras.powerUsageSupport = [];
}
this.commands.measure.result[ind].extras.powerUsageSupport.push({
powerUsageSupport: powerUsage,
});
});
}
}
async _startMeasureTime() {
this.context.log.info("Starting wallclock measurement");
this.startTime = performance.now();
}
async _stopMeasureTime(measurementName) {
this.context.log.info("Taking wallclock measurement");
this.commands.measure.addObject({
[measurementName]: [
parseFloat((performance.now() - this.startTime).toFixed(2)),
],
});
}
async reset(context, commands) {
this.testTimes = [];
this.context = context;
this.commands = commands;
}
async start() {
for (let measurementName in this.measurementMap) {
let measurementInfo = this.measurementMap[measurementName];
if (!(measurementInfo.run && measurementInfo.start)) {
continue;
}
await this[measurementInfo.start](measurementName);
}
}
async stop() {
for (let measurementName in this.measurementMap) {
let measurementInfo = this.measurementMap[measurementName];
if (!(measurementInfo.run && measurementInfo.stop)) {
continue;
}
await this[measurementInfo.stop](measurementName);
}
}
async finalize() {
for (let measurementName in this.measurementMap) {
let measurementInfo = this.measurementMap[measurementName];
if (!(measurementInfo.run && measurementInfo.finalize)) {
continue;
}
await this[measurementInfo.finalize](measurementName);
}
}
}
let supportMeasurementObj;
async function startMeasurements(
context,
commands,
measureCPU,
measurePower,
measureTime
) {
if (!supportMeasurementObj) {
supportMeasurementObj = new SupportMeasurements(
context,
commands,
measureCPU,
measurePower,
measureTime
);
}
await supportMeasurementObj.reset(context, commands);
await supportMeasurementObj.start();
}
async function stopMeasurements() {
if (!supportMeasurementObj) {
throw new Error("startMeasurements must be called before stopMeasurements");
}
await supportMeasurementObj.stop();
}
async function finalizeMeasurements() {
if (!supportMeasurementObj) {
throw new Error(
"startMeasurements must be called before finalizeMeasurements"
);
}
await supportMeasurementObj.finalize();
}
module.exports = {
SupportMeasurements,
startMeasurements,
stopMeasurements,
finalizeMeasurements,
};