age) {
        console.log("onMessageArrived:" + JSON.stringify(message));
        
        if (message.payloadString) {
          var temp = message.payloadString;
          if ("cpu" == message.topic) {
          	if(yDatasCPU.length>100)//不能无限增长，只保留最新100条
          		yDatasCPU.shift();
            yDatasCPU.push(Number.parseFloat(temp.substring(0, temp.length - 1)));
            if(xDatasCPU.length>100)
          		xDatasCPU.shift();
            xDatasCPU.push(getNow());
       