Re: [Xen-devel] VMX status report. Xen: #17270 & Xen0: #488 -- nonew issue

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

On 26/3/08 09:36, "Li, Haicheng" <haicheng.li@xxxxxxxxx> wrote:

>> I guess you do your testing offline, but do you have a feel for how
>> fast guest installation is now compared with a few weeks ago (before
>> mmio emulation changes)? I'm thinking it's slowed down rather a lot,
>> at least on my old Pentium 4 test system. :-(
> 
> Keir, we checked guest installation with rhel4u3 today, we compared c/s
> 17284 with c/s 16720,
> The result shows latest c/s with mmio emulation changes is a little bit
> faster than before on our test system with Xeon(r) processors, about 20
> seconds faster.

That's pretty surprising! I found out that slowdown on my P4 system for
WinXP installation is about 15%, so not as bad as I thought. And I can
probably reclaim most of that performance loss.

I find it hard to explain a performance *win* though!

 -- Keir



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