取得CPU速度的代码

class CCPUCalcutor

{

unsigned __int64 m_start;

public:

unsigned __int64 m_overhead;

CCPUCalcutor(void)

{

m_overhead = 0;

Start(); /// we get the start cycle

m_overhead = Stop();

// then we get the stop cycle catching the overhead time

}

void Start(void)

{

m_start = TheCycleCount();

}

unsigned __int64 Stop(void)

{

/// with the stop cycle we remove the overhead's time

return TheCycleCount()-m_start-m_overhead;

}

inline unsigned __int64 TheCycleCount(void)

{

_asm _emit 0x0F

_asm _emit 0x31

/// this causes a compiler warning as there is no return statement

/// however the _emits return a __int64 value

}

DWORD GetCPUSpeed()

{

Start();

Sleep(100);

unsigned cpuspeed100 = (unsigned)(Stop()/1000);

return cpuspeed100/100;

}

};

client只要这样调用就可以得到CPU的速度了：
CCPUCalcutor cpuCalc;
cpuCalc.GetCPUSpeed();

posted on 2007-05-15 16:02 笨笨阅读(1020) 评论(2) 编辑收藏引用所属分类: Windows编程

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