Current File : //lib/node_modules/pm2/node_modules/pidusage/lib/ps.js
'use strict'
var os = require('os')
var bin = require('./bin')
var history = require('./history')
var PLATFORM = os.platform()
function parseTime (timestr, centisec) {
var time = 0
var tpart = timestr.split(/-|:|\./)
var i = tpart.length - 1
if (i >= 0 && centisec && PLATFORM === 'darwin') {
time += parseInt(tpart[i--], 10) * 10
}
if (i >= 0) { // Seconds
time += parseInt(tpart[i--], 10) * 1000
}
if (i >= 0) { // Minutes
time += parseInt(tpart[i--], 10) * 60000
}
if (i >= 0) { // Hours
time += parseInt(tpart[i--], 10) * 3600000
}
if (i >= 0) { // Days
time += parseInt(tpart[i--], 10) * 86400000
}
return time
}
/**
* Get pid informations through ps command.
* @param {Number[]} pids
* @param {Object} options
* @param {Function} done(err, stat)
*/
function ps (pids, options, done) {
var pArg = pids.join(',')
var args = ['-o', 'etime,pid,ppid,pcpu,rss,time', '-p', pArg]
if (PLATFORM === 'aix') {
args = ['-o', 'etime,pid,ppid,pcpu,rssize,time', '-p', pArg]
}
bin('ps', args, function (err, stdout, code) {
if (err) return done(err)
if (code === 1) {
return done(new Error('No maching pid found'))
}
if (code !== 0) {
return done(new Error('pidusage ps command exited with code ' + code))
}
var date = Date.now()
// Example of stdout on *nix.
// ELAPSED: format is [[dd-]hh:]mm:ss
// RSS: is counted as blocks of 1024 bytes
// TIME: format is [[dd-]hh:]mm:ss
// %CPU: goes from 0 to vcore * 100
//
// Refs: http://www.manpages.info/linux/ps.1.html
// NB: The columns are returned in the order given inside the -o option
//
// ELAPSED PID PPID %CPU RSS TIME
// 2-40:50:53 430 1 3.0 5145 1-02:03:04
// 40:50:53 432 430 0.0 2364 1-01:02:03
// 01:50:50 727 1 10.0 348932 14:27
// 00:20 7166 1 0.1 3756 0:00
// Example of stdout on Darwin
// ELAPSED: format is [[dd-]hh:]mm:ss
// RSS: is counted as blocks of 1024 bytes
// TIME: format is [[dd-]hh:]mm:ss.cc (cc are centiseconds)
// %CPU: goes from 0 to vcore * 100
//
// Refs: https://ss64.com/osx/ps.html
// NB: The columns are returned in the order given inside the -o option
//
// ELAPSED PID PPID %CPU RSS TIME
// 2-40:50:53 430 1 3.0 5145 1-02:03:04.07
// 40:50:53 432 430 0.0 2364 1-01:02:03.10
// 01:50:50 727 1 10.0 348932 14:27.26
// 00:20 7166 1 0.1 3756 0:00.02
stdout = stdout.split(os.EOL)
var statistics = {}
for (var i = 1; i < stdout.length; i++) {
var line = stdout[i].trim().split(/\s+/)
if (!line || line.length !== 6) {
continue
}
var pid = parseInt(line[1], 10)
var hst = history.get(pid, options.maxage)
if (hst === undefined) hst = {}
var ppid = parseInt(line[2], 10)
var memory = parseInt(line[4], 10) * 1024
var etime = parseTime(line[0])
var ctime = parseTime(line[5], true)
var total = (ctime - (hst.ctime || 0))
// time elapsed between calls in seconds
var seconds = Math.abs(hst.elapsed !== undefined ? etime - hst.elapsed : etime)
var cpu = seconds > 0 ? (total / seconds) * 100 : 0
statistics[pid] = {
cpu: cpu,
memory: memory,
ppid: ppid,
pid: pid,
ctime: ctime,
elapsed: etime,
timestamp: date
}
history.set(pid, statistics[pid], options.maxage)
}
done(null, statistics)
})
}
module.exports = ps
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