stat.js

// normalized(0-1) 단위
// { average: 0.06, cpus: [ 0.06, 0.05, 0.05, 0.08 ] }
// warning: 부팅 이후의 값이므로, 실시간 측정은 불가능
const cpustat = function () {
  const cpus = os.cpus();

  const result = {};
  result.average = 0;
  result.cpus = [];
  for (let i = 0; i < cpus.length; i++) {
    const cpu = cpus[i];
    let total = 0;

    for (const type in cpu.times) {
      total += cpu.times[type];
    }

    result.cpus[i] = 1 - (cpu.times.idle / total);
  }

  for (let i = 0; i < result.cpus.length; i++) {
    result.average += result.cpus[i];
  }
  result.average /= result.cpus.length;

  for (let i = 0; i < result.cpus.length; i++) {
    result.cpus[i] = roundfloat(result.cpus[i], 2);
  }
  result.average = roundfloat(result.average, 2);

  return result;
};

// mb 단위
// { rss: 82.7, heapTotal: 66.2, heapUsed: 45.1 }
const memorystat = function () {
  const m = process.memoryUsage();
  const mb = 1024 * 1024;
  m.rss = roundfloat(m.rss / mb, 1);
  m.heapTotal = roundfloat(m.heapTotal / mb, 1);
  m.heapUsed = roundfloat(m.heapUsed / mb, 1);
  return m;
};