Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 11 Feb 2003 08:27:29 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 11 Feb 2003 08:27:29 -0500 Received: from ns.virtualhost.dk ([195.184.98.160]:1461 "EHLO virtualhost.dk") by vger.kernel.org with ESMTP id ; Tue, 11 Feb 2003 08:27:27 -0500 Date: Tue, 11 Feb 2003 14:37:09 +0100 From: Jens Axboe To: Con Kolivas Cc: linux kernel mailing list Subject: Re: [BENCHMARK] 2.5.60-cfq with contest Message-ID: <20030211133709.GO930@suse.de> References: <200302112155.17048.ckolivas@yahoo.com.au> <20030211105944.GB930@suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20030211105944.GB930@suse.de> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3248 Lines: 71 On Tue, Feb 11 2003, Jens Axboe wrote: > > Write based loads hurt. No breakages, but needs tuning. > > That's not even as bad as I had feared. I'll try to do some tuning with > contest locally. Here are my results, for 2.5.60 vanilla, 2.5.60 + cfq with default quantum of 16 (what you tested, too), and 2.5.60 + cfq without quantum setting. The latter should be the fairest, only moves one request from the pending queues. no_load: Kernel [runs] Time CPU% Loads LCPU% Ratio 2.5.60 2 31 177.4 0 0.0 1.00 2.5.60-cfq0 2 31 174.2 0 0.0 1.00 2.5.60-cfq16 2 31 177.4 0 0.0 1.00 cacherun: Kernel [runs] Time CPU% Loads LCPU% Ratio 2.5.60 2 29 182.8 0 0.0 0.94 2.5.60-cfq0 2 28 192.9 0 0.0 0.90 2.5.60-cfq16 2 29 182.8 0 0.0 0.94 process_load: Kernel [runs] Time CPU% Loads LCPU% Ratio 2.5.60 2 38 142.1 12 47.4 1.23 2.5.60-cfq0 2 41 129.3 16 61.0 1.32 2.5.60-cfq16 2 37 145.9 12 43.2 1.19 ctar_load: Kernel [runs] Time CPU% Loads LCPU% Ratio 2.5.60 2 38 147.4 0 0.0 1.23 2.5.60-cfq0 2 36 155.6 0 0.0 1.16 2.5.60-cfq16 2 36 155.6 0 0.0 1.16 xtar_load: Kernel [runs] Time CPU% Loads LCPU% Ratio 2.5.60 2 40 140.0 0 2.5 1.29 2.5.60-cfq0 2 37 148.6 0 2.7 1.19 2.5.60-cfq16 2 40 137.5 0 2.5 1.29 io_load: Kernel [runs] Time CPU% Loads LCPU% Ratio 2.5.60 2 93 61.3 2 14.0 3.00 2.5.60-cfq0 4 103 54.4 2 12.6 3.32 2.5.60-cfq16 2 264 21.6 12 19.9 8.52 read_load: Kernel [runs] Time CPU% Loads LCPU% Ratio 2.5.60 2 40 140.0 0 5.0 1.29 2.5.60-cfq0 2 39 143.6 0 5.1 1.26 2.5.60-cfq16 2 40 140.0 0 5.0 1.29 list_load: Kernel [runs] Time CPU% Loads LCPU% Ratio 2.5.60 2 35 157.1 0 8.6 1.13 2.5.60-cfq0 2 35 160.0 0 8.6 1.13 2.5.60-cfq16 2 35 160.0 0 14.3 1.13 mem_load: Kernel [runs] Time CPU% Loads LCPU% Ratio 2.5.60 2 50 116.0 75 10.0 1.61 2.5.60-cfq0 2 57 101.8 78 8.8 1.84 2.5.60-cfq16 2 60 96.7 80 8.2 1.94 dbench_load: Kernel [runs] Time CPU% Loads LCPU% Ratio 2.5.60 2 36 155.6 12693 27.8 1.16 2.5.60-cfq0 1 35 157.1 12013 28.6 1.13 2.5.60-cfq16 2 37 151.4 14356 32.4 1.19 -- Jens Axboe - 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/