xen-devel
Re: [Xen-devel] Re: Poor performance on HVM (kernbench)
Todd Deshane wrote:
Xen 3.3 should be an improvement with shadow3 right?
As other people already said, shadow3 (especially the current unsync
policy) was mostly developed with Windows performance in mind. I would
be surprised if the shadow algorithm is causing such a performance loss
though; but in any case, you can disable the out-of-sync feature by
removing SHOPT_OUT_OF_SYNC from SHADOW_OPTIMIZATIONS in
xen/arch/x86/mm/shadows/private.h (setting it to 0xff instead of 0x1ff),
reverting the shadow code back to shadow 2 again.
Can you please test that and see if it makes any difference?
Thanks,
Gianluca
Should I need to adjust the shadow_memory parameter for the guest?
I'm going to try Xen 3.2.1 from source next.
Todd
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- [Xen-devel] Poor performance on HVM (kernbench) , Todd Deshane
- [Xen-devel] Re: Poor performance on HVM (kernbench) , Todd Deshane
- Re: [Xen-devel] Re: Poor performance on HVM (kernbench),
Gianluca Guida <=
- Re: [Xen-devel] Re: Poor performance on HVM (kernbench) , Gianluca Guida
- Re: [Xen-devel] Re: Poor performance on HVM (kernbench) , Gianluca Guida
- Re: [Xen-devel] Re: Poor performance on HVM (kernbench) , Todd Deshane
- Re: [Xen-devel] Re: Poor performance on HVM (kernbench) , Gianluca Guida
- Re: [Xen-devel] Re: Poor performance on HVM (kernbench) , Gianluca Guida
- Re: [Xen-devel] Re: Poor performance on HVM (kernbench) , George Dunlap
- Re: [Xen-devel] Re: Poor performance on HVM (kernbench) , Gianluca Guida
- Re: [Xen-devel] Re: Poor performance on HVM (kernbench) , Todd Deshane
- Re: [Xen-devel] Re: Poor performance on HVM (kernbench) , Todd Deshane
- Re: [Xen-devel] Re: Poor performance on HVM (kernbench) , Jeremy Fitzhardinge
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