107 lines
2.9 KiB
JavaScript
107 lines
2.9 KiB
JavaScript
///CPU利用率
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import os from 'os';
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import si from 'systeminformation'
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const sleep = ms => new Promise(resolve => setTimeout(resolve, ms));
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class OSUtils {
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constructor() {
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this.cpuUsageMSDefault = 1000; // CPU 利用率默认时间段
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}
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/**
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* 获取某时间段 CPU 利用率
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* @param { Number } Options.ms [时间段，默认是 1000ms，即 1 秒钟]
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* @returns { Promise }
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*/
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async getCPUUsage(options) {
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const that = this;
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let cpuUsageMS = options * 1000;
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cpuUsageMS = cpuUsageMS || that.cpuUsageMSDefault;
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const t1 = that._getCPUInfo(); // t1 时间点 CPU 信息
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si.networkStats()
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await sleep(cpuUsageMS);
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const t2 = that._getCPUInfo(); // t2 时间点 CPU 信息
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const idle = t2.idle - t1.idle;
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const total = t2.total - t1.total;
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let usage = 1 - idle / total;
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return usage.toFixed(2)
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}
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// * 获取 CPU 瞬时时间信息
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// * @returns { Object } CPU 信息
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// * user <number> CPU 在用户模式下花费的毫秒数。
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// * nice <number> CPU 在良好模式下花费的毫秒数。
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// * sys <number> CPU 在系统模式下花费的毫秒数。
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// * idle <number> CPU 在空闲模式下花费的毫秒数。
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// * irq <number> CPU 在中断请求模式下花费的毫秒数。
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_getCPUInfo() {
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const cpus = os.cpus();
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let user = 0, nice = 0, sys = 0, idle = 0, irq = 0, total = 0;
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for (let cpu in cpus) {
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const times = cpus[cpu].times;
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user += times.user;
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nice += times.nice;
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sys += times.sys;
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idle += times.idle;
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irq += times.irq;
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}
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total += user + nice + sys + idle + irq;
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return {
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user,
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sys,
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idle,
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total,
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}
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}
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//获取最大Mhz
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getmaxspeed() {
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let res = os.cpus()
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try {
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let max = res[0].speed
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for (let i of res) {
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if (i.speed > max) {
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i.speed > max
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}
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}
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return `最大${max}MHz`
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} catch {
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return `无法获取MHz`
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}
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}
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/**字节转换 */
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getfilesize(size, isbtye = true) {//把字节转换成正常文件大小
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if (!size) return "";
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var num = 1024.00; //byte
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if (isbtye) {
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if (size < num)
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return size.toFixed(2) + "B";
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}
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if (size < Math.pow(num, 2))
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return (size / num).toFixed(2) + "Kb"; //kb
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if (size < Math.pow(num, 3))
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return (size / Math.pow(num, 2)).toFixed(2) + "Mb"; //M
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if (size < Math.pow(num, 4))
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return (size / Math.pow(num, 3)).toFixed(2) + "G"; //G
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return (size / Math.pow(num, 4)).toFixed(2) + "T"; //T
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}
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/**获取nodejs内存情况 */
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getmemory() {
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let memory = process.memoryUsage()
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let rss = this.getfilesize(memory.rss);
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let heapTotal = this.getfilesize(memory.heapTotal);
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let heapUsed = this.getfilesize(memory.heapUsed);
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let occupy = (memory.rss / (os.totalmem() - os.freemem())).toFixed(2)
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return { rss, heapTotal, heapUsed, occupy }
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}
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}
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export default new OSUtils(); |