- To: Raghavendra K T <raghavendra.kt@xxxxxxxxxxxxxxxxxx>
- Subject: Re: [PATCH RFC V8 0/17] Paravirtualized ticket spinlocks
- From: Srivatsa Vaddagiri <vatsa@xxxxxxxxxxxxxxxxxx>
- Date: Mon, 7 May 2012 19:16:11 +0530
- Cc: Avi Kivity <avi@xxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Jeremy Fitzhardinge <jeremy@xxxxxxxx>, Greg Kroah-Hartman <gregkh@xxxxxxx>, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>, Marcelo Tosatti <mtosatti@xxxxxxxxxx>, X86 <x86@xxxxxxxxxx>, Gleb Natapov <gleb@xxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Attilio Rao <attilio.rao@xxxxxxxxxx>, Virtualization <virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx>, Xen Devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, linux-doc@xxxxxxxxxxxxxxx, KVM <kvm@xxxxxxxxxxxxxxx>, Andi Kleen <andi@xxxxxxxxxxxxxx>, Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>, Stephan Diestelhorst <stephan.diestelhorst@xxxxxxx>, LKML <linux-kernel@xxxxxxxxxxxxxxx>, Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>
- In-reply-to: <4FA7D06B.60005@linux.vnet.ibm.com>
- Reply-to: Srivatsa Vaddagiri <vatsa@xxxxxxxxxxxxxxxxxx>
- User-agent: Mutt/1.5.21 (2010-09-15)
* 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.
- vatsa
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