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xen-devel
[Xen-devel] Re: [PATCH RFC 0/4] Paravirtual spinlocks
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To: |
Jeremy Fitzhardinge <jeremy@xxxxxxxx> |
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Subject: |
[Xen-devel] Re: [PATCH RFC 0/4] Paravirtual spinlocks |
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From: |
Ingo Molnar <mingo@xxxxxxx> |
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Date: |
Wed, 9 Jul 2008 14:28:52 +0200 |
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Cc: |
Jens Axboe <axboe@xxxxxxxxx>, Nick Piggin <nickpiggin@xxxxxxxxxxxx>, Xen devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>, Christoph Lameter <clameter@xxxxxxxxxxxxxxxxxxxx>, Petr Tesarik <ptesarik@xxxxxxx>, LKML <linux-kernel@xxxxxxxxxxxxxxx>, Avi Kivity <avi@xxxxxxxxxxxx>, Virtualization <virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx>, Thomas Friebel <thomas.friebel@xxxxxxx> |
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Wed, 09 Jul 2008 05:29:36 -0700 |
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<20080707190749.299430659@xxxxxxxx> |
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Mutt/1.5.18 (2008-05-17) |
* Jeremy Fitzhardinge <jeremy@xxxxxxxx> wrote:
> My experiments show that using a Xen-specific lock helps guest
> performance a bit (reduction in elapsed and system time in a kernbench
> run), but most significantly, reduces overall physical CPU consumption
> by 10%, and so increases overall system scalability.
that's rather impressive and looks nice, considering the fairly low
impact.
as there were no fundamental objections in this thread i've created a
tip/x86/paravirt-spinlocks topic branch for these patches and started
testing them.
i based the topic branch on tip/xen-64bit, so you should be able to get
the latest code by doing:
git-merge tip/x86/paravirt-spinlocks
on tip/master.
Ingo
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