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Re: [Xen-devel] serial8250: too much work for irq4

To: Markus Armbruster <armbru@xxxxxxxxxx>, Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
Subject: Re: [Xen-devel] serial8250: too much work for irq4
From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Date: Wed, 18 Feb 2009 17:27:10 +0000
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On 18/02/2009 17:04, "Markus Armbruster" <armbru@xxxxxxxxxx> wrote:

>> Do you have any better ideas for how to trick the guest into making
>> better use of its CPU time, which will solve your use case without
>> imposing an artificial wall clock based speed limit ?
>> 
>> Ian.
> 
> I'm afraid I don't.

Perhaps we could add a qemu command-line option to force accurate uart
emulation w.r.t. programmed FIFO depth and baud rate? Then those who want
this more accurate but more expensive and slower behaviour can configure it.

 -- Keir



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