From mboxrd@z Thu Jan 1 00:00:00 1970 From: Waiman Long Subject: Re: [PATCH RFC v6 10/11] pvqspinlock, x86: Enable qspinlock PV support for KVM Date: Thu, 13 Mar 2014 16:09:03 -0400 Message-ID: <5322105F.5090808@hp.com> References: <1394650498-30118-1-git-send-email-Waiman.Long@hp.com> <1394650498-30118-11-git-send-email-Waiman.Long@hp.com> <20140313152539.GD25546@laptop.programming.kicks-ass.net> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20140313152539.GD25546@laptop.programming.kicks-ass.net> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: virtualization-bounces@lists.linux-foundation.org Errors-To: virtualization-bounces@lists.linux-foundation.org To: Peter Zijlstra Cc: Jeremy Fitzhardinge , Raghavendra K T , kvm@vger.kernel.org, Boris Ostrovsky , virtualization@lists.linux-foundation.org, Andi Kleen , "H. Peter Anvin" , Michel Lespinasse , Thomas Gleixner , linux-arch@vger.kernel.org, Gleb Natapov , x86@kernel.org, Ingo Molnar , xen-devel@lists.xenproject.org, "Paul E. McKenney" , Rik van Riel , Arnd Bergmann , Konrad Rzeszutek Wilk , Scott J Norton , Steven Rostedt , Chris Wright , Oleg Nesterov , Alok Kataria , Aswin Chandramouleeswaran , Chegu List-Id: linux-arch.vger.kernel.org On 03/13/2014 11:25 AM, Peter Zijlstra wrote: > On Wed, Mar 12, 2014 at 02:54:57PM -0400, Waiman Long wrote: >> A KVM guest of 20 CPU cores was created to run the disk workload of >> the AIM7 benchmark on both ext4 and xfs RAM disks at 3000 users on a >> 3.14-rc6 based kernel. The JPM (jobs/minute) data of the test run were: > You really should just delete that aim7 crap. A benchmark that runs for > hours is _NOT_ usable. The specific subtest that I used run only 10 seconds or so in my test box as I used ramdisk for all the filesystem access. If you use a physical disk, it will be much slower. -Longman