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<div align="center" class="btitle">如何測試CPU的速度 <br>
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<div align="center"><strong>Carlos Alberto Longen </strong></div>
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摘 要</b>：這段代碼可以返回CPU的速度 <br>
<b> 關鍵字</b>：cpu 速度 頻率 <br>
<b> 類 別</b>：系統控制
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<span class="content">function CPUSpeed: Double; <Br>const <Br> DelayTime = 500; // 時間單位是毫秒 <Br>var <Br> TimerHi, TimerLo: DWORD; <Br> PriorityClass, Priority: Integer; <Br>begin <Br> PriorityClass := GetPriorityClass(GetCurrentProcess); <Br> Priority := GetThreadPriority(GetCurrentThread); <Br> SetPriorityClass(GetCurrentProcess, REALTIME_PRIORITY_CLASS); <Br> SetThreadPriority(GetCurrentThread, THREAD_PRIORITY_TIME_CRITICAL); <Br><Br> Sleep(10); <Br><Br> asm <Br> dw 310Fh // rdtsc <Br> mov TimerLo, eax <Br> mov TimerHi, edx <Br> end; <Br><Br> Sleep(DelayTime); <Br><Br> asm <Br> dw 310Fh // rdtsc <Br> sub eax, TimerLo <Br> sbb edx, TimerHi <Br> mov TimerLo, eax <Br> mov TimerHi, edx <Br> end; <Br><Br> SetThreadPriority(GetCurrentThread, Priority); <Br> SetPriorityClass(GetCurrentProcess, PriorityClass); <Br><Br> Result := TimerLo / (1000.0 * DelayTime); <Br>end;<Br><Br></span>
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