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import { BushTask, Time } from '#lib';
import os from 'node:os';
export default class CpuUsageTask extends BushTask {
public constructor() {
super('cpuUsage', {
delay: Time.Minute,
runOnStart: true
});
}
public async exec() {
const cpuStats = await cpu.usage(this.client.stats.cpu === undefined ? 100 * Time.Millisecond : Time.Minute);
this.client.stats.cpu = cpuStats;
}
}
/* Everything inside the cpu namespace is adapted from the "node-os-utils" npm package which is licensed under a MIT license by Sunil Wang */
namespace cpu {
export function usage(interval = Time.Second): Promise<number> {
return new Promise((resolve) => {
const startMeasure = average();
setTimeout(() => {
const endMeasure = average();
const idleDifference = endMeasure.avgIdle - startMeasure.avgIdle;
const totalDifference = endMeasure.avgTotal - startMeasure.avgTotal;
const cpuPercentage = (10000 - Math.round((10000 * idleDifference) / totalDifference)) / 100;
return resolve(cpuPercentage);
}, interval);
});
}
export function average(): CpuAverageInfo {
let totalIdle = 0;
let totalTick = 0;
const cpus = os.cpus();
for (let i = 0, len = cpus.length; i < len; i++) {
const cpu = cpus[i];
for (const type in cpu.times) {
totalTick += cpu.times[type as keyof typeof cpu.times];
}
totalIdle += cpu.times.idle;
}
return {
totalIdle: totalIdle,
totalTick: totalTick,
avgIdle: totalIdle / cpus.length,
avgTotal: totalTick / cpus.length
};
}
export interface CpuAverageInfo {
totalIdle: number;
totalTick: number;
avgIdle: number;
avgTotal: number;
}
}
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