From mboxrd@z Thu Jan 1 00:00:00 1970 From: Srivatsa Vaddagiri Subject: Re: [PATCH RFC V8 0/17] Paravirtualized ticket spinlocks Date: Mon, 7 May 2012 19:16:11 +0530 Message-ID: <20120507134611.GB5533@linux.vnet.ibm.com> References: <20120502100610.13206.40.sendpatchset@codeblue.in.ibm.com> <20120507082928.GI16608@gmail.com> <4FA7888F.80505@redhat.com> <4FA7AAD8.6050003@linux.vnet.ibm.com> <4FA7BABA.4040700@redhat.com> <4FA7CC05.50808@linux.vnet.ibm.com> <4FA7CCA2.4030408@redhat.com> <4FA7D06B.60005@linux.vnet.ibm.com> Reply-To: Srivatsa Vaddagiri Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Cc: Avi Kivity , Ingo Molnar , Linus Torvalds , Andrew Morton , Jeremy Fitzhardinge , Greg Kroah-Hartman , Konrad Rzeszutek Wilk , "H. Peter Anvin" , Marcelo Tosatti , X86 , Gleb Natapov , Ingo Molnar , Attilio Rao , Virtualization , Xen Devel , linux-doc@vger.kernel.org, KVM , Andi Kleen , Stefano Stabellini , Stephan Diestelhorst , LKML , Peter Zijlstra , Thomas Gleixner Return-path: Content-Disposition: inline In-Reply-To: <4FA7D06B.60005@linux.vnet.ibm.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: kvm.vger.kernel.org * Raghavendra K T [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