Re: [Xen-users] Xen support for emulating TSC register!!

[Tom Horsley <tom.horsley@xxxxxxx>]

On Fri, 2 Nov 2007 16:19:29 -0400
"techy geek" <techygeek72@xxxxxxxxx> wrote:

> Hi Everyone,
> 
> I need to do  some profiling on Xen Virtual machine.  I have a query here:
> 
> * Like VMWare, Can Xen Guest emulates the TSC  CPU register??? if Yes, then
> how is the performance of this TSC register as I read that VmWare  very
> poorly emulates the TSC register.

I suspect "poor" describes Xen as well. I keep seeing messages on the
console of various HVM's I have which say something about unstable TSC
values off by some 6 or 7 digit number of cycles.

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