Convert the output of os.cpus() in Node.js to percentage

Question

Is there a way to convert the os.cpus() info to percentage? Just like the output of iostat (on the CPU section).

My code:

var os = require(\'os\');
c         


        

Answer 1

a simple hack:

var os = require('os')
var samples = []
var prevCpus = os.cpus()

setInterval(sample,100)
setInterval(print,1000)

function print() {
  var result = {last10:null, last50:null, last100:null}
  var percent = 0
  var i = samples.length
  var j = 0
  while (i--) {
    j++
    if (samples[i].total > 0)
      percent += (100 - Math.round(100 * samples[i].idle / samples[i].total))
    if (j == 10)       result.last10  = percent/j   
    else if (j == 50)  result.last50  = percent/j    
    else if (j == 100) result.last100 = percent/j
  }
  console.log(result)
}

function sample() {
  currCpus = os.cpus()
  for (var i=0,len=currCpus.length;i100) samples.shift()
}

you could use a metrics-lib like https://github.com/felixge/node-measured to plumb something more prolific