Speed Test
Posted: Sun Dec 08, 2002 10:30 am
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Re:Speed Test
Posted: Sun Dec 08, 2002 7:25 pm
Err, is it just me or won't any code you use to check speed inside bochs give the 'Emulated' speed of the processor, not the equivalent real time speed?
Re:Speed Test
Posted: Mon Dec 09, 2002 11:29 am
Yes, re reading my post i realised it didn't quite put across what i intended. It was purely a comparative excercise to show the difference in speed between emulating something and running it natively.
Peter
Peter
Re:Speed Test
Posted: Tue Dec 10, 2002 2:44 am
busy looping is a very old-fashionned and unportable way to wait ... you should better replace your loop by something that will be kept accurate regardless of the actual CPU speed, like
* waiting for a timer interrupt
* waiting for a keypress (my personnal favourite one - can even be done by polling the keyboard port if you don't have an IDT up and running already
* waiting for a screen vertical retrace (if interrupt set up seems too hard to you)
* waiting for a timer interrupt
* waiting for a keypress (my personnal favourite one - can even be done by polling the keyboard port if you don't have an IDT up and running already
* waiting for a screen vertical retrace (if interrupt set up seems too hard to you)