cpu-stat

CPU Statistics not provided by `os` module

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cpu-stat
2.0.17 years ago7 years agoMinified + gzip package size for cpu-stat in KB

Readme

cpu-stat
_______ _______ ___ ___ _______ _______ _______ _______
 |   _   |   _   |   Y   |   _   |       |   _   |       |
 |.  1___|.  1   |.  |   |   1___|.|   | |.  1   |.|   | |
 |.  |___|.  ____|.  |   |____   `-|.  |-|.  _   `-|.  |-'
 |:  1   |:  |   |:  1   |:  1   | |:  | |:  |   | |:  |
 |::.. . |::.|   |::.. . |::.. . | |::.| |::.|:. | |::.|
 `-------`---'   `-------`-------' `---' `--- ---' `---'

Note: This repo can be found on npm here: cpu-stat
Note: This repo can be found on github here: node-cpu-stat
Note: This module only relies on the os module, so it should be compatible on all OS's where Node.js runs.

Install

npm install cpu-stat

Example

var cpuStat = require('cpu-stat');

//by default returns cpu usage percent for all cores over a period of the next 1000ms
cpuStat.usagePercent(function(err, percent, seconds) {
    if (err) {
      return console.log(err);
    }

    //the percentage cpu usage over all cores
    console.log(percent);

    //the approximate number of seconds the sample was taken over
    console.log(seconds);
});

//get the cpu usage percent for core 0 over a sample period of 2000ms
cpuStat.usagePercent({
    coreIndex: 0,
    sampleMs: 2000,
  },
  function(err, percent, seconds) {
    if (err) {
      return console.log(err);
    }

    //the percentage cpu usage for core 0
    console.log(percent);

    //the approximate number of seconds the sample was taken over
    console.log(seconds);
});

//get the total number of cores
var totalCores = cpuStat.totalCores();
console.log(totalCores);

//get the average clock MHz over all cores
var avgClockMHz = cpuStat.avgClockMHz();
console.log(avgClockMHz);

//get the clock MHz for core with index 2
var avgClockMHzCore2 = cpuStat.clockMHz(2);
console.log(avgClockMHzCore2);

usagePercent(opts, cb)

Provides a callback cb(err, percent, seconds) giving the percent cpu usage and seconds the length of the sample time, or an error err
Option | Type | Default | Explanation -------------------- | -------------| ------------------ | ------------ opts | Object | see below | Options object, specify what you need the defaults will be filled in opts.coreIndex | Number | all cores | The index of the core to calculate the usage on. Can use any coreIndex such that 0 >= coreIndex < memStat.totalCores() opts.sampleMs | String | 1000 | sampleMs is the amount of time to take the measurement over cb | Function | none | Callback which has signature cb(err, percent, seconds)

totalCores()

Returns the total number of cores available on the cpu

clockMHz(coreIndex)

Returns the clock speed in MHz of core with index coreIndex

avgClockMHz()

Returns the average clock speed in MHz over all cores

Contributing

Just send a PR, or create an issue if you are not sure.
Areas ripe for contribution:
  • testing
  • performance
  • bugs

Other Stat Modules


Note: net-stat, disk-stat, mem-stat only work on nix platforms.

License

MIT