50 lines
1.3 KiB
C++
50 lines
1.3 KiB
C++
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/* ========================================================================
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(C) Copyright 2023 by Molly Rocket, Inc., All Rights Reserved.
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Please see https://computerenhance.com for more information
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======================================================================== */
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/* ========================================================================
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LISTING 72
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======================================================================== */
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#include <stdint.h>
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#include <stdio.h>
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typedef uint64_t u64;
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typedef double f64;
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#include "listing_0070_platform_metrics.cpp"
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int main(void)
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{
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u64 OSFreq = GetOSTimerFreq();
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printf(" OS Freq: %llu\n", OSFreq);
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u64 CPUStart = ReadCPUTimer();
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u64 OSStart = ReadOSTimer();
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u64 OSEnd = 0;
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u64 OSElapsed = 0;
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while(OSElapsed < OSFreq)
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{
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OSEnd = ReadOSTimer();
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OSElapsed = OSEnd - OSStart;
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}
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u64 CPUEnd = ReadCPUTimer();
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u64 CPUElapsed = CPUEnd - CPUStart;
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printf(" OS Timer: %llu -> %llu = %llu elapsed\n", OSStart, OSEnd, OSElapsed);
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printf(" OS Seconds: %.4f\n", (f64)OSElapsed/(f64)OSFreq);
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printf(" CPU Timer: %llu -> %llu = %llu elapsed\n", CPUStart, CPUEnd, CPUElapsed);
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return 0;
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}
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