From: Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
To: Anthony Liguori <aliguori-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
Cc: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org,
Jerone Young <jyoung5-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>,
Hollis Blanchard
<hollisb-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
Subject: Re: [PATCH] Use a table to dispatch IO requests in kvmctl
Date: Wed, 10 Oct 2007 15:47:22 +0200 [thread overview]
Message-ID: <470CD7EA.3040500@qumranet.com> (raw)
In-Reply-To: <470CD6D3.8080805-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
Anthony Liguori wrote:
>>
>>>
>>> QEMU uses an array for PIO but a table for MMIO. I figured it would
>>> be best to just use the same table.
>>
>> Or the same array?
>
> Indexed by the address or just sorted and searchable? MMIO addresses
> are rather sparse so the former seems like the only sane thing.
I'm betting that a plain unsorted array will beat anything else with
less than 50 entries. Also that the difference will be swamped by
vmexit costs and by the actual emulation costs.
> It also has to support subpage granularity.
My patent pending unsorted array supports that out of the box.
--
error compiling committee.c: too many arguments to function
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next prev parent reply other threads:[~2007-10-10 13:47 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-09 21:40 [PATCH] Use a table to dispatch IO requests in kvmctl Anthony Liguori
[not found] ` <11919660094186-git-send-email-aliguori-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
2007-10-09 22:10 ` Anthony Liguori
2007-10-10 6:46 ` Hollis Blanchard
2007-10-10 7:14 ` Avi Kivity
[not found] ` <470C7BDC.7020106-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-10-10 13:24 ` Anthony Liguori
[not found] ` <470CD298.8060704-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
2007-10-10 13:25 ` Avi Kivity
[not found] ` <470CD2CD.5090903-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-10-10 13:42 ` Anthony Liguori
[not found] ` <470CD6D3.8080805-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
2007-10-10 13:47 ` Avi Kivity [this message]
[not found] ` <470CD7EA.3040500-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-10-10 13:59 ` Anthony Liguori
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