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Re: [Xen-devel] [PATCH RFC V8 0/17] Paravirtualized ticket spinlocks
- To: Srivatsa Vaddagiri <vatsa@xxxxxxxxxxxxxxxxxx>
- From: Avi Kivity <avi@xxxxxxxxxx>
- Date: Mon, 07 May 2012 16:49:25 +0300
- Cc: Jeremy Fitzhardinge <jeremy@xxxxxxxx>, X86 <x86@xxxxxxxxxx>, KVM <kvm@xxxxxxxxxxxxxxx>, linux-doc@xxxxxxxxxxxxxxx, Virtualization <virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx>, Andi Kleen <andi@xxxxxxxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>, Xen Devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Gleb Natapov <gleb@xxxxxxxxxx>, Raghavendra K T <raghavendra.kt@xxxxxxxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>, Marcelo Tosatti <mtosatti@xxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Greg Kroah-Hartman <gregkh@xxxxxxx>, LKML <linux-kernel@xxxxxxxxxxxxxxx>, Attilio Rao <attilio.rao@xxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>, Stephan Diestelhorst <stephan.diestelhorst@xxxxxxx>
- Delivery-date: Tue, 15 May 2012 11:14:12 +0000
- List-id: Xen developer discussion <xen-devel.lists.xen.org>
On 05/07/2012 04:46 PM, Srivatsa Vaddagiri wrote:
> * Raghavendra K T <raghavendra.kt@xxxxxxxxxxxxxxxxxx> [2012-05-07 19:08:51]:
>
> > I 'll get hold of a PLE mc and come up with the numbers soon. but I
> > 'll expect the improvement around 1-3% as it was in last version.
>
> Deferring preemption (when vcpu is holding lock) may give us better than 1-3%
> results on PLE hardware. Something worth trying IMHO.
Is the improvement so low, because PLE is interfering with the patch, or
because PLE already does a good job?
--
error compiling committee.c: too many arguments to function
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