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RE: [Xen-devel] Interrupt delivery

from [Ian Pratt]

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To:	"Ky Srinivasan" <ksrinivasan@xxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxxxx>
Subject:	RE: [Xen-devel] Interrupt delivery
From:	"Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>
Date:	Wed, 2 Mar 2005 21:56:05 -0000
Cc:	<ian.pratt@xxxxxxxxxxxx>
Delivery-date:	Wed, 02 Mar 2005 21:57:33 +0000
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Thread-topic:	[Xen-devel] Interrupt delivery

> Does Xen attempt to pre-emptively schedule the domain that is the
> recepient of a physical device interrupt. A quick look at the code
> appears to indicate that all we do is unblock the domain if it is
> blocked (evtchn_set_pending()). Are Driver domains given any 
> preference in scheduling?

Both BVT and Antropos have some controls for influencing domains'
unblocking latency, but as yet there's been no systematic attempt made
to tune any of the parameters. I know Stephan is looking into some of
this stuff.

Ian


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