Roel Schroeven wrote:
>
> > > I was going to ask about RDTSC, because BeOS needs it to boot.
>
> Just out of curiosity, is this the instruction that is called by then Win32
> API call QueryPerformanceCounter? And on what platforms is it available?
> MSDN states "Some systems include a high-resolution performance counter that
> provides high-resolution elapsed times." But is doesn't get anymore
> specific, and my search on the web hasn't returned any useful information
> either. Does anybody know this?
Dont' know myself. But handling RDTSC correctly is a matter of
sampling the real TSC and delivering time to the guest OS
via RDTSC based on the amount of cycles the guest has actually
run, potentially with a clock skew applied.
Which brings up something else. One nice thing to put into
open source OSes would be calling an interface to the VM
code to handle delay loops.
-Kevin
--
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Kevin Lawton [EMAIL PROTECTED]
MandrakeSoft, Inc. Plex86 developer
http://www.linux-mandrake.com/ http://www.plex86.org/
