Windows API函数中有没有能够得到CPU时钟频率的函数

[fatrain]

Windows API函数中有没有能够得到CPU时钟频率的函数

[oyljerry]

汇编asm

[nuaawenlin]

QeryPerformerFrequency

[mynamelj]

#include < iostream >
using namespace std;
#include < windows.h >


unsigned __int64 GetCPUSpeed(){
unsigned __int64 start, stop;
unsigned __int64 nCtr, nFreq, nCtrStop;
QueryPerformanceFrequency((LARGE_INTEGER *)&nFreq);
_asm _emit 0x0F
_asm _emit 0x31
_asm mov DWORD PTR start, eax
_asm mov DWORD PTR [start+4], edx
QueryPerformanceCounter((LARGE_INTEGER *)&nCtrStop);
nCtrStop += nFreq;
do{
QueryPerformanceCounter((LARGE_INTEGER *)&nCtr);
} while (nCtr < nCtrStop);
_asm _emit 0x0F
_asm _emit 0x31
_asm mov DWORD PTR stop, eax
_asm mov DWORD PTR [stop+4], edx
return (stop-start);
}

int main()
{
char szRet[256];
__int64 tmp;
SetPriorityClass(GetCurrentProcess(), REALTIME_PRIORITY_CLASS);
SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_TIME_CRITICAL);
cout << "Please wait..." << endl;
tmp = GetCPUSpeed();
sprintf(szRet,"%I64u",tmp);
cout << szRet << endl;
return 0;
}

[fatrain]

非常感谢mynamelj(风之羽翼) 、nuaawenlin(飘人)、oyljerry(☆勇敢的心☆－Paper Reviewing)，热心的人还是很多的。

[fatrain]

还想问一下的是，CPU还有什么工作主频之类的参数，都可以用QueryPerformanceFrequency得到么