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xen-devel
Re: [Xen-devel] Re: Improving hvm IO performance by using self IO emulat
On Thu, Feb 22, 2007 at 09:41:20PM +0000, Mark Williamson wrote:
> While I'm thinking about it, I wonder how returning to the guest from the
> emulator would work...
>
> We'd want to hypercall to transfer back to it... do we need specific Xen
> support for this or could (for instance) Gerd's work on domU kexec be
> leveraged here?
>
> Perhaps it would be worth evaluating some kind of "send these events and then
> switch back to guest code" hypercall so that the emulator doesn't have to
> bounce in and out of Xen so much. Remains to be seen whether this makes much
> diffecence to overall performance but it seems somehow civilised ;-)
For sure, there are a lot of possible minor optimization points...
Tristan.
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