161 lines
6.8 KiB
JavaScript
161 lines
6.8 KiB
JavaScript
'use strict';
|
|
// ==================================================================================
|
|
// memory.js
|
|
// ----------------------------------------------------------------------------------
|
|
// Description: System Information - library
|
|
// for Node.js
|
|
// Copyright: (c) 2014 - 2017
|
|
// Author: Sebastian Hildebrandt
|
|
// ----------------------------------------------------------------------------------
|
|
// License: MIT
|
|
// ==================================================================================
|
|
// 5. Memory
|
|
// ----------------------------------------------------------------------------------
|
|
|
|
const os = require('os');
|
|
const exec = require('child_process').exec;
|
|
const fs = require('fs');
|
|
const util = require('./util');
|
|
|
|
let _platform = os.type();
|
|
|
|
const _linux = (_platform == 'Linux');
|
|
const _darwin = (_platform == 'Darwin');
|
|
const _windows = (_platform == 'Windows_NT');
|
|
const NOT_SUPPORTED = 'not supported';
|
|
|
|
// _______________________________________________________________________________________
|
|
// | R A M | H D |
|
|
// |______________________|_________________________| | |
|
|
// | active buffers/cache | | |
|
|
// |________________________________________________|___________|_________|______________|
|
|
// | used free | used free |
|
|
// |____________________________________________________________|________________________|
|
|
// | total | swap |
|
|
// |____________________________________________________________|________________________|
|
|
|
|
// free (older versions)
|
|
// ----------------------------------
|
|
// # free
|
|
// total used free shared buffers cached
|
|
// Mem: 16038 (1) 15653 (2) 384 (3) 0 (4) 236 (5) 14788 (6)
|
|
// -/+ buffers/cache: 628 (7) 15409 (8)
|
|
// Swap: 16371 83 16288
|
|
//
|
|
// |------------------------------------------------------------|
|
|
// | R A M |
|
|
// |______________________|_____________________________________|
|
|
// | active (2-(5+6) = 7) | available (3+5+6 = 8) |
|
|
// |______________________|_________________________|___________|
|
|
// | active | buffers/cache (5+6) | |
|
|
// |________________________________________________|___________|
|
|
// | used (2) | free (3) |
|
|
// |____________________________________________________________|
|
|
// | total (1) |
|
|
// |____________________________________________________________|
|
|
|
|
//
|
|
// free (since free von procps-ng 3.3.10)
|
|
// ----------------------------------
|
|
// # free
|
|
// total used free shared buffers/cache available
|
|
// Mem: 16038 (1) 628 (2) 386 (3) 0 (4) 15024 (5) 14788 (6)
|
|
// Swap: 16371 83 16288
|
|
//
|
|
// |------------------------------------------------------------|
|
|
// | R A M |
|
|
// |______________________|_____________________________________|
|
|
// | | available (6) estimated |
|
|
// |______________________|_________________________|___________|
|
|
// | active (2) | buffers/cache (5) | free (3) |
|
|
// |________________________________________________|___________|
|
|
// | total (1) |
|
|
// |____________________________________________________________|
|
|
//
|
|
// Reference: http://www.software-architect.net/blog/article/date/2015/06/12/-826c6e5052.html
|
|
|
|
module.exports = function (callback) {
|
|
|
|
return new Promise((resolve, reject) => {
|
|
process.nextTick(() => {
|
|
if (_windows) {
|
|
let error = new Error(NOT_SUPPORTED);
|
|
if (callback) { callback(NOT_SUPPORTED) }
|
|
reject(error);
|
|
}
|
|
|
|
let result = {
|
|
total: os.totalmem(),
|
|
free: os.freemem(),
|
|
used: os.totalmem() - os.freemem(),
|
|
|
|
active: os.totalmem() - os.freemem(), // temporarily (fallback)
|
|
available: os.freemem(), // temporarily (fallback)
|
|
buffcache: 0,
|
|
|
|
swaptotal: 0,
|
|
swapused: 0,
|
|
swapfree: 0
|
|
};
|
|
|
|
if (_linux) {
|
|
exec("free -b", function (error, stdout) {
|
|
if (!error) {
|
|
let lines = stdout.toString().split('\n');
|
|
|
|
let mem = lines[1].replace(/ +/g, " ").split(' ');
|
|
result.total = parseInt(mem[1]);
|
|
result.free = parseInt(mem[3]);
|
|
|
|
if (lines.length === 4) { // free (since free von procps-ng 3.3.10)
|
|
result.buffcache = parseInt(mem[5]);
|
|
result.available = parseInt(mem[6]);
|
|
mem = lines[2].replace(/ +/g, " ").split(' ');
|
|
} else { // free (older versions)
|
|
result.buffcache = parseInt(mem[5]) + parseInt(mem[6]);
|
|
result.available = result.free + result.buffcache;
|
|
mem = lines[3].replace(/ +/g, " ").split(' ');
|
|
}
|
|
result.active = result.total - result.free - result.buffcache;
|
|
|
|
result.swaptotal = parseInt(mem[1]);
|
|
result.swapfree = parseInt(mem[3]);
|
|
result.swapused = parseInt(mem[2]);
|
|
|
|
}
|
|
if (callback) { callback(result) }
|
|
resolve(result);
|
|
});
|
|
}
|
|
if (_darwin) {
|
|
exec("vm_stat | grep 'Pages active'", function (error, stdout) {
|
|
if (!error) {
|
|
let lines = stdout.toString().split('\n');
|
|
|
|
result.active = parseInt(lines[0].split(':')[1]) * 4096;
|
|
result.buffcache = result.used - result.active;
|
|
result.available = result.free + result.buffcache;
|
|
}
|
|
exec("sysctl -n vm.swapusage", function (error, stdout) {
|
|
if (!error) {
|
|
let lines = stdout.toString().split('\n');
|
|
if (lines.length > 0) {
|
|
let line = lines[0].replace(/,/g, ".").replace(/M/g, "");
|
|
line = line.trim().split(' ');
|
|
for (let i = 0; i < line.length; i++) {
|
|
if (line[i].toLowerCase().indexOf('total') != -1) result.swaptotal = parseFloat(line[i].split('=')[1].trim()) * 1024 * 1024;
|
|
if (line[i].toLowerCase().indexOf('used') != -1) result.swapused = parseFloat(line[i].split('=')[1].trim()) * 1024 * 1024;
|
|
if (line[i].toLowerCase().indexOf('free') != -1) result.swapfree = parseFloat(line[i].split('=')[1].trim()) * 1024 * 1024;
|
|
|
|
}
|
|
}
|
|
}
|
|
if (callback) { callback(result) }
|
|
resolve(result);
|
|
});
|
|
});
|
|
}
|
|
});
|
|
});
|
|
};
|