@oaklean/profiler
Version:
A library to measure the energy consumption of your javascript/typescript code
323 lines • 25.5 kB
JavaScript
;
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
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var desc = Object.getOwnPropertyDescriptor(m, k);
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desc = { enumerable: true, get: function() { return m[k]; } };
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Object.defineProperty(o, k2, desc);
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o[k2] = m[k];
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}) : function(o, v) {
o["default"] = v;
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var __importStar = (this && this.__importStar) || (function () {
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var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.PerfSensorInterface = exports.PerfEvent = void 0;
const fs = __importStar(require("fs"));
const child_process_1 = require("child_process");
const profiler_core_1 = require("@oaklean/profiler-core");
const BaseSensorInterface_1 = require("../BaseSensorInterface");
/**
* This SensorInterface uses the data provided by the perf command line tool.
* This Provider can only be used on Linux with Perf installed and a CPU that supports RAPL
*
* Man Page to perf:
* https://linux.die.net/man/1/perf
*/
var PerfEvent;
(function (PerfEvent) {
PerfEvent["ENERGY_CORES"] = "power/energy-cores/";
PerfEvent["ENERGY_RAM"] = "power/energy-ram/";
})(PerfEvent || (exports.PerfEvent = PerfEvent = {}));
class PerfSensorInterface extends BaseSensorInterface_1.BaseSensorInterface {
constructor(options, debugOptions) {
var _a;
super();
this._platform = (_a = debugOptions === null || debugOptions === void 0 ? void 0 : debugOptions.platform) !== null && _a !== void 0 ? _a : process.platform;
this._executable = 'perf';
this._options = options;
if (debugOptions !== undefined) {
this._startTime = debugOptions.startTime;
this._stopTime = debugOptions.stopTime;
this._couldBeExecuted = true;
}
this._eventHandler = new profiler_core_1.EventHandler();
}
type() {
return profiler_core_1.SensorInterfaceType.perf;
}
commandLineArgs() {
return __awaiter(this, void 0, void 0, function* () {
const availableMeasurementTypes = yield this.availableMeasurementTypes();
return [
'stat',
...(availableMeasurementTypes[PerfEvent.ENERGY_CORES]
? ['-e', PerfEvent.ENERGY_CORES]
: []),
...(availableMeasurementTypes[PerfEvent.ENERGY_RAM]
? ['-e', PerfEvent.ENERGY_RAM]
: []),
'-x',
"'|'",
'-I',
this._options.sampleInterval.toString(),
'-o',
this._options.outputFilePath
];
});
}
canBeExecuted() {
return __awaiter(this, void 0, void 0, function* () {
if (this._platform !== 'linux') {
profiler_core_1.LoggerHelper.appPrefix.error('PerfSensorInterface: This sensor interface can only be used on Linux. Your platform:', this._platform);
return false;
}
const availableMeasurementTypes = yield this.availableMeasurementTypes();
return (availableMeasurementTypes[PerfEvent.ENERGY_CORES] ||
availableMeasurementTypes[PerfEvent.ENERGY_RAM]);
});
}
availableMeasurementTypes() {
return __awaiter(this, void 0, void 0, function* () {
if (this._availableMeasurementTypes === undefined) {
this._availableMeasurementTypes = {
[PerfEvent.ENERGY_CORES]: yield this.checkEventAvailability(PerfEvent.ENERGY_CORES),
[PerfEvent.ENERGY_RAM]: yield this.checkEventAvailability(PerfEvent.ENERGY_RAM)
};
}
return this._availableMeasurementTypes;
});
}
checkEventAvailability(eventName) {
return new Promise((resolve) => {
try {
const childProcess = (0, child_process_1.spawn)(this._executable + ' stat -e ' + eventName + ' -- sleep 0.001', {
detached: false,
stdio: 'pipe',
shell: true
});
childProcess.on('close', (code) => {
if (code === 0) {
resolve(true);
}
else {
resolve(false);
}
});
}
catch (_a) {
resolve(false);
}
});
}
isRunning() {
var _a;
return (((_a = this._childProcess) === null || _a === void 0 ? void 0 : _a.pid) !== undefined &&
BaseSensorInterface_1.BaseSensorInterface.pidIsRunning(this._childProcess.pid));
}
static runningInstances() {
try {
const result = (0, child_process_1.execSync)('pgrep -ix perf', { encoding: 'utf-8' });
return result.trim().split('\n');
// eslint-disable-next-line @typescript-eslint/no-unused-vars
}
catch (error) {
return [];
}
}
getOutputContent() {
if (!fs.existsSync(this._options.outputFilePath)) {
return undefined;
}
return fs.readFileSync(this._options.outputFilePath).toString();
}
readSensorValues(pid) {
return __awaiter(this, void 0, void 0, function* () {
if (!(yield this.couldBeExecuted())) {
return undefined;
}
let tries = 0;
while (this.isRunning() && tries < 10) {
profiler_core_1.LoggerHelper.error(`Cannot read sensor values, wait for process to exit: ${tries + 1}, try again after 1 second`);
tries += 1;
yield profiler_core_1.TimeHelper.sleep(1000);
}
if (this.startTime === undefined || this.stopTime === undefined) {
throw new Error('PerfSensorInterface.readSensorValues: start or stop time could not be determined');
}
const content = this.getOutputContent();
if (content === undefined) {
return new profiler_core_1.MetricsDataCollection(pid, profiler_core_1.MetricsDataCollectionType.PerfTotalSystem, [], {
startTime: this.startTime,
stopTime: this.stopTime
});
}
const lines = content.split('\n');
let lastDuration = 0; // seconds
let cpu_energy = 0;
let ram_energy = 0;
const data = [];
const availableMeasurementTypes = yield this.availableMeasurementTypes();
const captured = {
[PerfEvent.ENERGY_CORES]: false,
[PerfEvent.ENERGY_RAM]: false
};
for (let i = 2; i < lines.length; i++) {
if (lines[i] === '') {
break;
}
const values = lines[i].trim().replace(/'/g, '').split('|');
const duration = parseFloat(values[0].replace(/,/g, '.')); // seconds
const joules = parseFloat(values[1].replace(/,/g, '.'));
const type = values[3];
/**
* power/energy-cores/ and power/ram/ values come alternating like this:
*
* 0.001105752|0,01|Joules|power/energy-cores/|1127122|100,00||
* 0.001105752|0,00|Joules|power/energy-ram/|1127583|100,00||
* 0.002236542|0,01|Joules|power/energy-cores/|1139557|100,00||
* 0.002236542|0,00|Joules|power/energy-ram/|1139006|100,00||
*
*/
switch (type) {
case PerfEvent.ENERGY_CORES:
cpu_energy = (joules * 1e3);
captured[PerfEvent.ENERGY_CORES] = true;
break;
case PerfEvent.ENERGY_RAM:
ram_energy = (joules * 1e3);
captured[PerfEvent.ENERGY_RAM] = true;
break;
default:
break;
}
if (captured[PerfEvent.ENERGY_CORES] ===
availableMeasurementTypes[PerfEvent.ENERGY_CORES] &&
captured[PerfEvent.ENERGY_RAM] ===
availableMeasurementTypes[PerfEvent.ENERGY_RAM]) {
data.push(new profiler_core_1.PerfMetricsData({
elapsed_ns: BigInt(Math.round((duration - lastDuration) * 1e9)), // convert into nano seconds
timestamp: (this.startTime +
BigInt(Math.ceil(duration * 1e9))),
cpu_energy: cpu_energy,
ram_energy: ram_energy
}));
lastDuration = duration;
captured[PerfEvent.ENERGY_CORES] = false;
captured[PerfEvent.ENERGY_RAM] = false;
}
}
return new profiler_core_1.MetricsDataCollection(pid, profiler_core_1.MetricsDataCollectionType.PerfTotalSystem, data, {
startTime: this.startTime,
stopTime: this.stopTime
});
});
}
get startTime() {
return this._startTime;
}
get stopTime() {
return this._stopTime;
}
startProfiling() {
return __awaiter(this, void 0, void 0, function* () {
if (!(yield this.couldBeExecuted())) {
return;
}
if (fs.existsSync(this._options.outputFilePath)) {
fs.unlinkSync(this._options.outputFilePath); // remove output file to ensure clean measurements
}
if (PerfSensorInterface.runningInstances().length > 0) {
throw new Error('PerfSensorInterface.startProfiling: ' +
'Perf instance already running, close it before taking any measurements');
}
this._startTime = profiler_core_1.TimeHelper.getCurrentHighResolutionTime();
this._childProcess = (0, child_process_1.spawn)(this._executable, [...(yield this.commandLineArgs())], {
detached: true
});
this.cleanExit = () => {
if (this._childProcess) {
this._childProcess.kill('SIGTERM');
}
};
this._fileWatcher = fs.watchFile(this._options.outputFilePath, (curr, prev) => {
if (curr.size > prev.size) {
this._eventHandler.fire('measurementCaptured');
}
});
process.on('exit', this.cleanExit); // add event listener to close perf if the parent process exits
// detach from current node.js process
this._childProcess.unref();
yield profiler_core_1.TimeHelper.sleep(1000 + this._options.sampleInterval); // wait to ensure measurements started, since the measurements only starts at full seconds
});
}
/*
Blocks until the first measurements started
*/
measurementStarted() {
return __awaiter(this, void 0, void 0, function* () {
yield this._eventHandler.waitForFirstEventCall('measurementCaptured');
});
}
stopProfiling() {
return __awaiter(this, void 0, void 0, function* () {
if (!(yield this.couldBeExecuted())) {
return;
}
if (this._childProcess === undefined) {
return;
}
// wait to capture last measurement
yield this._eventHandler.awaitEventCall('measurementCaptured');
if (this._fileWatcher !== undefined) {
fs.unwatchFile(this._options.outputFilePath);
}
this._childProcess.kill('SIGIO'); // flush all buffered output
this._stopTime = profiler_core_1.TimeHelper.getCurrentHighResolutionTime();
this._childProcess.kill('SIGTERM');
let seconds = 0;
while (this.isRunning()) {
if (seconds > 10) {
throw new Error('Waited 10 seconds for perf to shut down, it is still running');
}
yield profiler_core_1.TimeHelper.sleep(1000);
seconds++;
}
if (this.cleanExit !== undefined) {
process.removeListener('exit', this.cleanExit); // clean up event listener
}
});
}
}
exports.PerfSensorInterface = PerfSensorInterface;
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