Re: [Qemu-devel] kqemu processor feature question

[Jim C. Brown]

On Wed, Oct 19, 2005 at 11:11:43PM +0400, Brad Campbell wrote:
> It is off.. that is my issue.. Not quite sure what is going on ..
> Anyway.. the -no-tsc patch works around my issue, but there is still 
> something wierd going on with
> my tsc.
> 
> Regards,
> Brad
> --
> "Human beings, who are almost unique in having the ability
> to learn from the experience of others, are also remarkable
> for their apparent disinclination to do so." -- Douglas Adams

qemu uses an unreliable timesource, the rdtsc instruction. That works most of
the time but is not a good idea when CPU usage varies a lot. I'm not suprised
at the difference across cpus either.

I'm not sure if kqemu has an effect on this or not (but if it does, kernel code
would probably have slower ticks that user mode code).

-- 
Infinite complexity begets infinite beauty.
Infinite precision begets infinite perfection.