From: David Vrabel <dvrabel@cantab.net>
To: Andreas Kinzler <ml-xen-devel@hfp.de>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>,
xen-devel@lists.xensource.com,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Subject: Re: Poor performance with Linux 3.x as dom0
Date: Wed, 02 May 2012 14:30:48 +0100 [thread overview]
Message-ID: <4FA13708.4050202@cantab.net> (raw)
In-Reply-To: <4FA1328B.6070602@hfp.de>
On 02/05/12 14:11, Andreas Kinzler wrote:
> Hello Jeremy + Konrad + all kernel devs,
>
> while it is great to see that vanilla dom0 seems to work, the
> performance breakdown compared to xenified 2.6.34 (from opensuse) is
> huge. Here are my benchmarks:
>
> Xen 4.1.1, Xeon E5620, Supermicro X8DTi-F, 12 GB RAM, dom0 2 VCPUs
>
> time emerge apache:
>
> 3.2.12-dom0 3.3.4-dom0 2.6.34.10-dom0
> real 1m0.560s 0m59.971s 0m47.689s
> user 0m40.939s 0m40.619s 0m41.355s
> sys 0m18.865s 0m18.305s 0m11.441s
Can you apply 7eb7ce4d2e8991aff4ecb71a81949a907ca755ac "xen: correctly
check for pending events when restoring irq flags"[1] and see how much
it helps?
This patch is in 3.4-rc5 and is queued for 3.3.5.
David
[1]
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=commit;h=7eb7ce4d2e8991aff4ecb71a81949a907ca755ac
next prev parent reply other threads:[~2012-05-02 13:30 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-02 13:11 Poor performance with Linux 3.x as dom0 Andreas Kinzler
2012-05-02 13:30 ` David Vrabel [this message]
2012-05-02 17:01 ` Andreas Kinzler
2012-05-03 8:32 ` George Dunlap
2012-05-03 10:46 ` Andreas Kinzler
2012-05-02 13:31 ` Ian Campbell
2012-05-03 10:43 ` Andreas Kinzler
2012-05-03 10:51 ` Ian Campbell
2012-05-07 19:48 ` Konrad Rzeszutek Wilk
2012-05-18 16:39 ` Andreas Kinzler
2012-05-03 11:33 ` Stefano Stabellini
2012-05-03 11:31 ` Stefano Stabellini
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