Re: [v6] kvm/fpu: Enable fully eager restore kvm FPU

[H. Peter Anvin]

On 04/23/2015 08:28 AM, Dave Hansen wrote:
> On 04/23/2015 02:13 PM, Liang Li wrote:
>> When compiling kernel on westmere, the performance of eager FPU
>> is about 0.4% faster than lazy FPU.
> 
> Do you have an theory why this is?  What does the regression come from?
> 

This is interesting since previous measurements on KVM have had the
exact opposite results.  I think we need to understand this a lot more.

	-hpa


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