64 lines
1.7 KiB
C++
64 lines
1.7 KiB
C++
/* ========================================================================
|
|
|
|
(C) Copyright 2023 by Molly Rocket, Inc., All Rights Reserved.
|
|
|
|
This software is provided 'as-is', without any express or implied
|
|
warranty. In no event will the authors be held liable for any damages
|
|
arising from the use of this software.
|
|
|
|
Please see https://computerenhance.com for more information
|
|
|
|
======================================================================== */
|
|
|
|
/* ========================================================================
|
|
LISTING 73
|
|
======================================================================== */
|
|
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
|
|
typedef uint64_t u64;
|
|
typedef double f64;
|
|
|
|
#include "listing_0070_platform_metrics.cpp"
|
|
|
|
int main(int ArgCount, char **Args)
|
|
{
|
|
u64 MillisecondsToWait = 1000;
|
|
if(ArgCount == 2)
|
|
{
|
|
MillisecondsToWait = atol(Args[1]);
|
|
}
|
|
|
|
u64 OSFreq = GetOSTimerFreq();
|
|
printf(" OS Freq: %llu (reported)\n", OSFreq);
|
|
|
|
u64 CPUStart = ReadCPUTimer();
|
|
u64 OSStart = ReadOSTimer();
|
|
u64 OSEnd = 0;
|
|
u64 OSElapsed = 0;
|
|
u64 OSWaitTime = OSFreq * MillisecondsToWait / 1000;
|
|
while(OSElapsed < OSWaitTime)
|
|
{
|
|
OSEnd = ReadOSTimer();
|
|
OSElapsed = OSEnd - OSStart;
|
|
}
|
|
|
|
u64 CPUEnd = ReadCPUTimer();
|
|
u64 CPUElapsed = CPUEnd - CPUStart;
|
|
u64 CPUFreq = 0;
|
|
if(OSElapsed)
|
|
{
|
|
CPUFreq = OSFreq * CPUElapsed / OSElapsed;
|
|
}
|
|
|
|
printf(" OS Timer: %llu -> %llu = %llu elapsed\n", OSStart, OSEnd, OSElapsed);
|
|
printf(" OS Seconds: %.4f\n", (f64)OSElapsed/(f64)OSFreq);
|
|
|
|
printf(" CPU Timer: %llu -> %llu = %llu elapsed\n", CPUStart, CPUEnd, CPUElapsed);
|
|
printf(" CPU Freq: %llu (guessed)\n", CPUFreq);
|
|
|
|
return 0;
|
|
}
|