Re: [Xen-devel] [PATCH] svm: Do not intercept RDTCS(P) when TSC scaling is supported by hardware

[Keir Fraser <keir@xxxxxxx>]

On 25/04/2012 17:04, "Wei Huang" <wei.huang2@xxxxxxx> wrote:

>> I certainly don't feel comfortable ACKing it.  I'd like
>> to see some testing that demonstrates the patch either improves
>> functionality or performance without breaking other things.
>> But if nobody else shares my concern, I don't feel that
>> I have the right to block it either.
> 
> We can provide some rdtsc performance numbers. Regarding functionality,
> it is relatively hard to prove unless Dan has some more specific ideas
> of testing it. I think the hardware rdtsc scaling is inline with
> software-based emulated approach.

I've put it in to xen-unstable. I'm not sure about putting into 4.1 for the
forthcoming release from that branch.

 -- Keir



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