CE6 CPU 使用率

 1 /* 
 2 在 OEMIdle() 函数中 OEM 根据 (int)(dwRescheduleTime – CurMSec)  
 3 计算值判断是否让 CPU 进入 idle 状态，因此我们可以利用此函数来计算 CPU 的 loading.  
 4 根据 MSDN ,可以写个应用程序，每 100ms 去计算一次 idle 的时间， 
 5 10 次评价后，在UI上更新，以下是一个被 Timer 循环调用的函数。建议将此函数写成的一个线程。 
 6 */  
 7   
 8 void CSystemInfoDlg::GetCpuStatus(CString &csInfo)  
 9 {  
10 #define IDLE_COUNT  10  
11   DWORD dwStartTick = 0;  
12   DWORD dwIdleStart = 0;  
13   DWORD dwStopTick = 0;  
14   DWORD dwIdleEnd = 0;  
15   int iPresentIdle = 0;  
16   int iCpuUage[IDLE_COUNT] = {0};  
17   int iCount = 0;  
18   int iAverage = 0;  
19   static int iPreAverage = 0;  
20   DWORD dwSum = 0;   
21   int i = 0;  
22   
23   while(iCount < IDLE_COUNT)  
24   {  
25     dwStartTick = GetTickCount();  
26     dwIdleStart = GetIdleTime();  
27     Sleep(100);  
28   
29     dwStopTick = GetTickCount();  
30     dwIdleEnd = GetIdleTime();  
31   
32     iPresentIdle = (100 * (dwIdleEnd - dwIdleStart)) / (dwStopTick - dwStartTick);  
33     iCpuUage[iCount] = iPresentIdle;  
34     iCount++;  
35     //10 times count  
36     if(IDLE_COUNT == iCount)  
37     {  
38       for(i = 0;i < IDLE_COUNT;i++)  
39       {  
40         dwSum += iCpuUage[i];  
41       }  
42       iAverage = dwSum / IDLE_COUNT;  
43   
44       if(iPreAverage != iAverage)  
45       {  
46         iPreAverage = iAverage;  
47       }  
48       RETAILMSG(1,(TEXT("CPU used is:%d%%\r\n"),100 - iAverage));  
49       csInfo.Format(L"CPU used is:%d%%.",100 - iAverage);  
50   
51       break;  
52     }  
53   }  
54 }