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Re: [Xen-devel] [PATCH] x86 hvm: freeze PIT/LAPIC timer emulation while

To: "Cui, Dexuan" <dexuan.cui@xxxxxxxxx>, Kouya Shimura <kouya@xxxxxxxxxxxxxx>
Subject: Re: [Xen-devel] [PATCH] x86 hvm: freeze PIT/LAPIC timer emulation while its IRQ is masked
From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Date: Wed, 16 Sep 2009 09:20:41 +0100
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On 16/09/2009 09:00, "Cui, Dexuan" <dexuan.cui@xxxxxxxxx> wrote:

> Looks the little win doesn't deserve the increased complexity in code.
> 
> BTW, recent Intel CPUs run much faster with respect to VMEntry/VMExit and
> VMREAD/VMWRITE, so I don't think the SW optimizatin is appearling here. :-)

Makes it more appealing doesn't it? As this path will be a greater
proportion of an overall vmexit/vmenter cycle.

 -- Keir



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