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