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