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xen-devel
RE: [Xen-devel] VMX status report. Xen: #17270 & Xen0: #488 --nonew issu
Keir Fraser wrote:
> Well, I implemented a virtual-address to mmio-physical-address
> lookaside cache for x86_emulate(), and with that I get following
> results for install of WinXP (time is up to second reboot, after
> graphical part of install, from an auto-install CD image):
> xen 3.2: 1 hour 20 minutes 23 seconds
> xen unstable using x86_emulate(): 1 hour 33 minutes 4 seconds
> xen unstable with new optimisation: 1 hour 12 minutes 57 seconds
>
> Considering first result (Xen 3.2) as a baseline control experiment,
> basic x86_emulate() mmio performance is 16% slower, while with the
> simple extra optimisation I get a 10% speedup (so that's 22% speedup
> compared without the optimisation).
>
> Pretty nice!
>
> -- Keir
Really great!
-- Dexuan
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