From: Nicholas Lee <nic-lists@plumtree.co.nz>
To: Keir Fraser <Keir.Fraser@cl.cam.ac.uk>
Cc: xen-devel@lists.sourceforge.net,
Ian Pratt <m+Ian.Pratt@cl.cam.ac.uk>,
ian.pratt@cl.cam.ac.uk
Subject: Re: Interrupt levels
Date: Tue, 8 Mar 2005 22:45:13 +1300 [thread overview]
Message-ID: <20050308094510.GD1419@plumtree.co.nz> (raw)
In-Reply-To: <84f5d51a61663b8b42eea7bc937626b0@cl.cam.ac.uk>
On Tue, Mar 08, 2005 at 09:14:55AM +0000, Keir Fraser wrote:
>
> This can happen if you block/unblock very frequently. The timer
> interrupt from Xen isn't entirely tick-based -- you also get a timer
> interrupt every time you are rescheduled.
By block/unblock I assume you mean context switching between different
domains. Is this level normal? Is there a method to track down exactly
is causing the block/unblocking?
> So the large number of timer interrupts indicates lots of unblocking.
> Really we should hold-off the timer interrupt if the domain was
> descheduled for less than a jiffy. :-)
Is there a way to fix this at the moment?
Nicholas
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next prev parent reply other threads:[~2005-03-08 9:45 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-03-08 7:52 Interrupt levels Ian Pratt
2005-03-08 8:50 ` Nicholas Lee
2005-03-08 9:14 ` Keir Fraser
2005-03-08 9:45 ` Nicholas Lee [this message]
2005-03-08 11:45 ` Nicholas Lee
-- strict thread matches above, loose matches on Subject: below --
2005-03-10 2:28 Ian Pratt
2005-03-10 5:41 ` Nicholas Lee
2005-03-10 10:47 ` James Bulpin
2005-03-09 22:24 Ian Pratt
2005-03-10 1:56 ` Nicholas Lee
2005-03-09 21:33 Ian Pratt
2005-03-09 22:12 ` Nicholas Lee
2005-03-09 15:20 Ian Pratt
2005-03-09 20:03 ` Nicholas Lee
2005-03-09 9:38 Ian Pratt
2005-03-09 10:59 ` Nicholas Lee
2005-03-09 8:47 Ian Pratt
2005-03-09 9:22 ` Nicholas Lee
2005-03-09 8:03 Ian Pratt
2005-03-09 8:17 ` Nicholas Lee
2005-03-08 23:24 Ian Pratt
2005-03-08 12:50 Ian Pratt
2005-03-09 0:48 ` Nicholas Lee
2005-03-09 3:32 ` Nicholas Lee
2005-03-08 11:07 Ian Pratt
2005-03-08 23:17 ` Nicholas Lee
2005-03-08 23:22 ` Nivedita Singhvi
2005-03-09 0:38 ` Nicholas Lee
2005-03-08 6:52 Nicholas Lee
2005-03-08 21:58 ` Kurt Garloff
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