取CPU利用率

最新推荐文章于 2024-08-04 11:13:34 发布

转载最新推荐文章于 2024-08-04 11:13:34 发布 · 707 阅读

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#define _WIN32_WINNT   0x0501
#include <Windows.h>
#include <iostream> 
using   namespace   std;
__int64 CompareFileTime ( FILETIME time1, FILETIME time2 )
{
       __int64 a = time1.dwHighDateTime << 32 | time1.dwLowDateTime ;
       __int64 b = time2.dwHighDateTime << 32 | time2.dwLowDateTime ;
       return   (b - a);
}
void main() 
{ 
HANDLE hEvent;
BOOL res ;
FILETIME preidleTime;
FILETIME prekernelTime;
FILETIME preuserTime;
FILETIME idleTime;
FILETIME kernelTime;
FILETIME userTime;
res = GetSystemTimes( &idleTime, &kernelTime, &userTime );
preidleTime = idleTime;
prekernelTime = kernelTime;
preuserTime = userTime ;

hEvent = CreateEvent (NULL,FALSE,FALSE,NULL); // 初始值为 nonsignaled ，并且每次触发后自动设置为nonsignaled
while (1){

      WaitForSingleObject( hEvent,1000 ); //等待500毫秒
      res = GetSystemTimes( &idleTime, &kernelTime, &userTime );
     
       int idle = CompareFileTime( preidleTime,idleTime);
       int kernel = CompareFileTime( prekernelTime, kernelTime);
       int user = CompareFileTime(preuserTime, userTime);
int cpu = (kernel +user - idle) *100/(kernel+user);
     int cpuidle = ( idle) *100/(kernel+user);
     cout << "CPU利用率:" << cpu << "%" << "      CPU空闲率:" <<cpuidle << "%" <<endl;
  
    preidleTime = idleTime;
    prekernelTime = kernelTime;
    preuserTime = userTime ;
}


}