From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265477AbUABKLz (ORCPT ); Fri, 2 Jan 2004 05:11:55 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265476AbUABKLy (ORCPT ); Fri, 2 Jan 2004 05:11:54 -0500 Received: from ns.virtualhost.dk ([195.184.98.160]:34740 "EHLO virtualhost.dk") by vger.kernel.org with ESMTP id S265477AbUABKLo (ORCPT ); Fri, 2 Jan 2004 05:11:44 -0500 Date: Fri, 2 Jan 2004 11:11:42 +0100 From: Jens Axboe To: Kernel Mailing List Subject: Re: 2.6.0 performance problems Message-ID: <20040102101142.GI5523@suse.de> References: <20031230012551.GA6226@k3.hellgate.ch> <20031230132145.B32120@hexapodia.org> <20031230194051.GD22443@holomorphy.com> <20031230222403.GA8412@k3.hellgate.ch> <20031231101741.GA4378@k3.hellgate.ch> <20031231112119.GB3089@suse.de> <20040101230911.GA28438@k3.hellgate.ch> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20040101230911.GA28438@k3.hellgate.ch> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jan 02 2004, Roger Luethi wrote: > On Wed, 31 Dec 2003 12:21:19 +0100, Jens Axboe wrote: > > the qsbench suckiness? Do you have numbers for 2.4.x and 2.6.1-rc with > > the various io schedulers (it would be interesting to see stock, > > elevator=deadline, and elevator=noop). > > For 2.6 AS comes out on top. It seems though that AS may be at least > partially responsible for the exploding variance of run times for > qsbench. > > I don't think we can compare 2.4 and 2.6 I/O schedulers for these > loads. The io scheduler can do only so much if the VM evicts the > wrong pages. Agree, in case of a thrashing vm it's an impossible job. > Average, times for ten runs (in seconds, ordered). > > efax avg > 2.4.23 228.8 227 227 228 229 229 229 229 230 230 230 > 2.6.0 noop 861.8 833 855 860 865 866 866 867 867 869 870 > 2.6.0 deadline 846.1 813 827 830 845 850 854 856 859 861 866 > 2.6.0 as 850.8 827 834 839 840 840 841 864 864 874 885 > > kbuild avg > 2.4.23 140.4 116 118 124 125 132 150 153 157 161 168 > 2.6.0 noop 638.2 552 569 596 600 608 631 634 658 712 822 > 2.6.0 deadline 570.0 494 495 517 529 532 545 596 619 670 703 > 2.6.0 as 486.1 406 429 453 468 473 477 510 536 542 567 > > qsbench avg > 2.4.23 223.8 219 220 221 223 223 223 223 225 230 231 > 2.6.0 noop 380.0 333 343 374 377 382 389 391 391 403 417 > 2.6.0 deadline 368.8 339 361 361 372 372 373 375 377 377 381 > 2.6.0 as 329.3 253 279 281 286 300 355 371 374 388 406 -- Jens Axboe