Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933231AbaDIMDZ (ORCPT ); Wed, 9 Apr 2014 08:03:25 -0400 Received: from e28smtp02.in.ibm.com ([122.248.162.2]:45337 "EHLO e28smtp02.in.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932831AbaDIMDW (ORCPT ); Wed, 9 Apr 2014 08:03:22 -0400 Message-ID: <5345382B.3050400@linux.vnet.ibm.com> Date: Wed, 09 Apr 2014 17:38:11 +0530 From: Raghavendra K T Organization: IBM User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130625 Thunderbird/17.0.7 MIME-Version: 1.0 To: Waiman Long CC: Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , Peter Zijlstra , linux-arch@vger.kernel.org, x86@kernel.org, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, xen-devel@lists.xenproject.org, kvm@vger.kernel.org, Paolo Bonzini , Konrad Rzeszutek Wilk , "Paul E. McKenney" , Rik van Riel , Linus Torvalds , David Vrabel , Oleg Nesterov , Gleb Natapov , Aswin Chandramouleeswaran , Scott J Norton , Chegu Vinod Subject: Re: [PATCH v8 00/10] qspinlock: a 4-byte queue spinlock with PV support References: <1396445259-27670-1-git-send-email-Waiman.Long@hp.com> <5342425A.7040005@linux.vnet.ibm.com> <5342D475.7060503@hp.com> <5342E5B2.1070306@linux.vnet.ibm.com> <53444AEE.9050705@hp.com> In-Reply-To: <53444AEE.9050705@hp.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 14040912-5816-0000-0000-00000D622D0D Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 04/09/2014 12:45 AM, Waiman Long wrote: > Yes, I am able to reproduce the hang problem with ebizzy. BTW, could you > try to apply the attached patch file on top of the v8 patch series to > see if it can fix the hang problem? Ran the benchmarks with the fix and I am not seeing hang so far. ebizzy improvements. 0.5x 2.7345 1x -10.6593 1.5x 35.6962 2x 88.0461 dbench improvements 0.5x 3.2428 1x 1.1514 1.5x 5.5071 2x 23.8700 ( I will have to restest on ebizzy 1x reression but overall performance numbers look good). >> Baseline was 3.14-rc8 without any of the qspin patch series. >> > > Does the baseline have PV ticketlock or without any PV support? baseline had PV ticketlock enabled. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/