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RE: [Xen-devel][RFC]degradation on IPF due to hypercall set irq

To: "Keir Fraser" <keir@xxxxxxxxxxxxx>
Subject: RE: [Xen-devel][RFC]degradation on IPF due to hypercall set irq
From: "Xu, Anthony" <anthony.xu@xxxxxxxxx>
Date: Fri, 24 Nov 2006 23:53:52 +0800
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx, xen-ia64-devel <xen-ia64-devel@xxxxxxxxxxxxxxxxxxx>
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Thread-topic: [Xen-devel][RFC]degradation on IPF due to hypercall set irq
Keir Fraser write on 2006年11月24日 23:29:
> On 24/11/06 14:45, "Xu, Anthony" <anthony.xu@xxxxxxxxx> wrote:
> 
>> Until now, I can't see hypercall is faster than share PIC line.
>> 
>> Can you enlighten me why we use hypercall?
> 
> I didn't change it for speed but because it's cleaner. I believe it
> can be made no slower, with a bit of effort. x86 certainly won't be
> reverting to the shared state.  

Can't share PIC line be done in a clean way?
I don't think so.
I think which one get better performance wins.

--Anthony


> 
>  -- Keir

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