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Re: [Qemu-devel] [v2 0/2] add avx2 instruction optimization


From: Li, Liang Z
Subject: Re: [Qemu-devel] [v2 0/2] add avx2 instruction optimization
Date: Thu, 12 Nov 2015 02:49:11 +0000

> 
> On 10/11/2015 10:26, Li, Liang Z wrote:
> > I don't know Paolo's opinion about how to deal with the SSE2
> > Intrinsics, he is the author. From my personal view, now that we have
> > found a better way, why to use such low level SSE2/AVX2 Intrinsics.
> 
> I totally agree. :)
> 
> Paolo

Hi Paolo,

I am very surprised about the live migration performance  result when I use 
your ' memeqzero4_paolo' instead of these SSE2 Intrinsics to check the zero 
pages.
The total live migration time increased about 8%!   Not decreased.  Although in 
the unit test your ' memeqzero4_paolo'  has better performance, any idea?

Liang


  



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