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<title>如何测试CPU的速度                                 </title>
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      <div align="center" class="btitle">如何测试CPU的速度                                 <br>
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      <div align="center"><strong>Carlos Alberto Longen                             </strong></div>
       
      <b><br>
      　摘　要</b>：这段代码可以返回CPU的速度                         <br>
      <b>　关键字</b>：cpu 速度 频率                                      <br>
      <b>　类　别</b>：系统控制                                           
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      <span class="content">function&nbsp;CPUSpeed:&nbsp;Double;&nbsp;<Br>const&nbsp;<Br>&nbsp;&nbsp;DelayTime&nbsp;=&nbsp;500;&nbsp;//&nbsp;时间单位是毫秒&nbsp;<Br>var&nbsp;<Br>&nbsp;&nbsp;TimerHi,&nbsp;TimerLo:&nbsp;DWORD;&nbsp;<Br>&nbsp;&nbsp;PriorityClass,&nbsp;Priority:&nbsp;Integer;&nbsp;<Br>begin&nbsp;<Br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;PriorityClass&nbsp;:=&nbsp;GetPriorityClass(GetCurrentProcess);&nbsp;<Br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Priority&nbsp;:=&nbsp;GetThreadPriority(GetCurrentThread);&nbsp;<Br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;SetPriorityClass(GetCurrentProcess,&nbsp;REALTIME_PRIORITY_CLASS);&nbsp;<Br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;SetThreadPriority(GetCurrentThread,&nbsp;THREAD_PRIORITY_TIME_CRITICAL);&nbsp;<Br><Br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Sleep(10);&nbsp;<Br><Br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;asm&nbsp;<Br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;dw&nbsp;310Fh&nbsp;//&nbsp;rdtsc&nbsp;<Br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;mov&nbsp;TimerLo,&nbsp;eax&nbsp;<Br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;mov&nbsp;TimerHi,&nbsp;edx&nbsp;<Br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;end;&nbsp;<Br><Br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Sleep(DelayTime);&nbsp;<Br><Br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;asm&nbsp;<Br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;dw&nbsp;310Fh&nbsp;//&nbsp;rdtsc&nbsp;<Br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;sub&nbsp;eax,&nbsp;TimerLo&nbsp;<Br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;sbb&nbsp;edx,&nbsp;TimerHi&nbsp;<Br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;mov&nbsp;TimerLo,&nbsp;eax&nbsp;<Br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;mov&nbsp;TimerHi,&nbsp;edx&nbsp;<Br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;end;&nbsp;<Br><Br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;SetThreadPriority(GetCurrentThread,&nbsp;Priority);&nbsp;<Br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;SetPriorityClass(GetCurrentProcess,&nbsp;PriorityClass);&nbsp;<Br><Br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Result&nbsp;:=&nbsp;TimerLo&nbsp;/&nbsp;(1000.0&nbsp;*&nbsp;DelayTime);&nbsp;<Br>end;<Br><Br></span> 
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