关于编程控制CPU使用率的笔记

代码

#include "Windows.h"

#include "stdlib.h"

#include "math.h"

#include <tchar.h>

const double SPLIT = 0.01;

const int COUNT = 200;

const double PI = 3.14159265;

const int INTERVAL = 300;

int _tmain(int argc, _TCHAR* argv[])

#include "stdafx.h"

#include "Windows.h"

#include "stdlib.h"

#include "math.h"

#include <tchar.h>

const double SPLIT = 0.01;

const int COUNT = 200;

const double PI = 3.14159265;

const int INTERVAL = 300;

int _tmain(int argc, _TCHAR* argv[])

{

SetProcessAffinityMask(

GetCurrentProcess(),

0x00000001 //cpu mask

);

DWORD busySpan[COUNT]; //array of busy times

DWORD idleSpan[COUNT]; //array of idle times

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;

}