编程之美--1.1控制CPU曲线

 

 

控制CPU运行曲线一直在50%

public class MyCPU {
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        int busyTime = 10;
        int idleTime = 10;
        long startTime;
//        while(true){
//            for(int i = 0 ; i < 960000000 ; i++)
//                ;
//            try {
//                Thread.sleep(10);
//            } catch (InterruptedException e) {
//                // TODO Auto-generated catch block
//                e.printStackTrace();
//            }
//        }

        while(true){
            
            startTime = System.currentTimeMillis();
            while(System.currentTimeMillis()-startTime<busyTime)
                ;
            try {
                Thread.sleep(idleTime);
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }

    }

}

 

CPU曲线为正弦曲线

public class SinCPU {

    public static void main(String[] args) {
        // TODO Auto-generated method stub

        double PI = 3.14159265;
        int interval = 300;
        int Count = 200; // 数组大小;
        double[] busyTime = new double[Count];
        double[] idleTime = new double[Count];

        int half = interval / 2;
        double radian = 0.0;
        for (int i = 0; i < Count; i++) {
            busyTime[i] = half + Math.sin(PI * radian) * half;
            idleTime[i] = interval-busyTime[i];
            radian+=0.01;//每次+0.01，200次，正好到2，上面括号里就是2PI
        }

        long startTime;
        int j = 0;
        while (true) {
            j=j%Count;
            startTime = System.currentTimeMillis();
            while (System.currentTimeMillis() - startTime < busyTime[j])
                ;
            try {
                Thread.sleep((int)idleTime[j]);
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            j++;
        }
    }

}