From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Pekka Enberg" Subject: Re: Mainline kernel OLTP performance update Date: Fri, 16 Jan 2009 12:31:03 +0200 Message-ID: <84144f020901160231k9e896d2o672079c1a2973632@mail.gmail.com> References: <20090115135236.GB29283@parisc-linux.org> <84144f020901160216q17f1b558q955d5b8fb7c528c0@mail.gmail.com> <200901162121.09128.nickpiggin@yahoo.com.au> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from fg-out-1718.google.com ([72.14.220.152]:38709 "EHLO fg-out-1718.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757462AbZAPKbF (ORCPT ); Fri, 16 Jan 2009 05:31:05 -0500 In-Reply-To: <200901162121.09128.nickpiggin@yahoo.com.au> Content-Disposition: inline Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Nick Piggin Cc: Matthew Wilcox , Andrew Morton , "Wilcox, Matthew R" , chinang.ma@intel.com, linux-kernel@vger.kernel.org, sharad.c.tripathi@intel.com, arjan@linux.intel.com, andi.kleen@intel.com, suresh.b.siddha@intel.com, harita.chilukuri@intel.com, douglas.w.styner@intel.com, peter.xihong.wang@intel.com, hubert.nueckel@intel.com, chris.mason@oracle.com, srostedt@redhat.com, linux-scsi@vger.kernel.org, Andrew Vasquez , Anirban Chakraborty , Christoph Lameter On Friday 16 January 2009 21:16:31 Pekka Enberg wrote: >> I had lockdep enabled in my config so I ran the tests again with >> x86-64 defconfig and I'm back to square one: >> >> [ number of transactions per second from 10 runs, bigger is better ] >> >> min max avg sd >> 2.6.29-rc1-slab 802.02 805.37 803.93 0.97 >> 2.6.29-rc1-slub 807.78 811.20 809.86 1.05 On Fri, Jan 16, 2009 at 12:21 PM, Nick Piggin wrote: > Hm, I wonder why it is going slower with lockdep disabled? > Did something else change? I don't have the exact config for the previous tests but it's was just my laptop regular config whereas the new tests are x86-64 defconfig. So I think I'm just hitting some of the other OLTP regressions here, aren't I? There's some scheduler related options such as CONFIG_GROUP_SCHED and CONFIG_FAIR_GROUP_SCHED enabled in defconfig that I didn't have in the original tests. I can try without them if you want but I'm not sure it's relevant for SLAB vs SLUB tests. Pekka