Cpu表现出正弦曲线

#include <windows.h>
#include <math.h>
int main(void)
{
         SetThreadAffinityMask(GetCurrentProcess(), 0x00000001);
    const double SPLIT=0.01;
    const int COUNT=200;
    const double PI=3.14159265;
    const int INTERVAL=300;
    DWORD busySpan[COUNT]; //array of busy time
    DWORD idleSpan[COUNT]; //array of idle time
    int half=INTERVAL/2;
    double radian=0.0;
    for(int i=0;i<COUNT;i++)
    {
        busySpan[i]=(DWORD)(half+(sin(PI*radian)*half));
        idleSpan[i]=INTERVAL-busySpan[i];
        radian+=SPLIT;
    }
    DWORD startTime=0;
    int j=0;
    while(true)
    {
        j=j%COUNT;
        startTime=GetTickCount();
        while((GetTickCount()-startTime)<=busySpan[j])
            ;
        Sleep(idleSpan[j]);
        j++;
    }
    return 0;
}

参考：http://www.cnblogs.com/Ripper-Y/archive/2012/05/19/2508511.html