nodejs中的集群

Question

我在ubuntu

中尝试过以下代码

var cluster = exports.cluster = require('cluster');
var numCPUs = require('os').cpus().length;

if (cluster.isMaster) {

  for (var i = 0; i < numCPUs; i++) {
    cluster.fork();
  }

  cluster.on('exit', function(worker, code, signal) {
    console.log('worker ' + worker.process.pid + ' died. Trying to respawn...');
    cluster.fork();
  });

} else {

//spawn express etc

}

如何在nodejs中使用或不使用群集来检查ubuntu中的CPU性能 对此有任何帮助将非常有帮助