Node v0.7.0出たのでIsolatesのテスト

isolates-example.js

var child_process = require('child_process');
var cpuCount = require('os').cpus().length;

if(process.features.isolates) {
  if(process.tid == 1) {
    //main thread
    console.log("Isolates is supported! (" + process.version + ")");
    for(var i = 0; i < 5; i++) { //ここでは試験用に固定値だが、CPU使いきりたいならcpuCount使うと良いか
      var child = child_process.fork(__filename, null, {thread: true});
      child.send("Hello thread");
      child.on('message', function(m) {
        console.log(m);
      });
    }
  } else {
    //child thread
    process.on('message', function(m) {
      process.send("receive [" + m + "]. pid:" + process.pid + ", tid:" + process.tid);
    });
    setTimeout(function(){
      //実行中のプロセスツリーを確認するために5秒生きる
      console.log("I die. pid:" + process.pid + ", tid:" + process.tid);
    }, 5000);
  }
} else {
  if(!process.env.forked) {
    //main process
    console.log("Isolates is not supported! (" + process.version + ")");
    for(var i = 0; i < 5; i++) { //ここでは試験用に固定値だが、CPU使いきりたいならcpuCount使うと良いか
      var child = child_process.fork(__filename, null, {env: {forked:1}});
      child.send("Hello process");
      child.on('message', function(m) {
        console.log(m);
      });
    }
  } else {
    //child process
    process.on('message', function(m) {
      process.send("receive [" + m + "]. pid:" + process.pid + ", tid:" + process.tid);
    });
    setTimeout(function(){
      //実行中のプロセスツリーを確認するために5秒生きる
      console.log("I die. pid:" + process.pid + ", tid:" + process.tid);
      process.exit();
    }, 5000);
  }
}

output

$ nvm use v0.7.0
$ node isolates-example.js
Isolate is supported! (v0.7.0)
receive [Hello thread]. pid:30300, tid:2
receive [Hello thread]. pid:30300, tid:6
receive [Hello thread]. pid:30300, tid:5
receive [Hello thread]. pid:30300, tid:3
receive [Hello thread]. pid:30300, tid:4
I die. pid:30300, tid:2
I die. pid:30300, tid:6
I die. pid:30300, tid:5
I die. pid:30300, tid:3
I die. pid:30300, tid:4

$ nvm use v0.6.7
$ node isolates-example.js
Isolate is not supported! (v0.6.7)
receive [Hello process]. pid:7528, tid:undefined
receive [Hello process]. pid:7530, tid:undefined
receive [Hello process]. pid:7527, tid:undefined
receive [Hello process]. pid:7526, tid:undefined
receive [Hello process]. pid:7529, tid:undefined
I die. pid:7528, tid:undefined
I die. pid:7530, tid:undefined
I die. pid:7527, tid:undefined
I die. pid:7526, tid:undefined
I die. pid:7529, tid:undefined

process tree

$ ps f #v0.7.0
22526 pts/0    Ss     0:00 -bash
30300 pts/0    Sl+    0:00  \_ node isolates-example.js

$ ps f #v0.6.7
22526 pts/0    Ss     0:00 -bash
 7512 pts/0    Sl+    0:00  \_ node isolates-example.js
 7526 pts/0    Sl+    0:00      \_ /home/kawaz/.nvm/v0.6.7/bin/node /tmp/isolates-example.js
 7527 pts/0    Sl+    0:00      \_ /home/kawaz/.nvm/v0.6.7/bin/node /tmp/isolates-example.js
 7528 pts/0    Sl+    0:00      \_ /home/kawaz/.nvm/v0.6.7/bin/node /tmp/isolates-example.js
 7529 pts/0    Sl+    0:00      \_ /home/kawaz/.nvm/v0.6.7/bin/node /tmp/isolates-example.js
 7530 pts/0    Sl+    0:00      \_ /home/kawaz/.nvm/v0.6.7/bin/node /tmp/isolates-example.js