cpu load

gistfile1.coffee

_ = require 'underscore'
http = require 'http'
fs = require 'fs'
dgram = require 'dgram'

every = (delay, cb) -> setInterval cb, delay*1000

sock = dgram.createSocket('udp4')

prev_total = prev_idle = 0

every 1, ->
  fs.readFile '/proc/stat', (err, data) ->
    stats = (data+'').match(/^cpu[^0-9]*([ [0-9]*]*).*/)?[1].trim().split ' '
    idle = stats[3]*1
    total = stats[0..3].reduce (t, s) -> t*1 + s*1
    load = calc_load total, idle
    msg = 'load:'+load+'|g'
    console.log msg
    sock.send (buf=new Buffer msg), 0, buf.length, 8125, '10.0.0.100'

calc_load = (total, idle) ->
    d_total = total - prev_total
    d_idle = idle - prev_idle
    prev_total = total
    prev_idle = idle
    (d_total - d_idle) / d_total * 100