Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sat, 7 Dec 2002 00:10:01 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sat, 7 Dec 2002 00:10:01 -0500 Received: from c17928.thoms1.vic.optusnet.com.au ([210.49.249.29]:15744 "EHLO laptop.localdomain") by vger.kernel.org with ESMTP id convert rfc822-to-8bit; Sat, 7 Dec 2002 00:10:00 -0500 Content-Type: text/plain; charset="us-ascii" From: Con Kolivas To: linux kernel mailing list Subject: [BENCHMARK] max bomb segment tuning with read latency 2 patch in contest Date: Sat, 7 Dec 2002 16:20:01 +1100 User-Agent: KMail/1.4.3 Cc: Andrew Morton MIME-Version: 1.0 Content-Transfer-Encoding: 8BIT Message-Id: <200212071620.05503.conman@kolivas.net> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1617 Lines: 40 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Here are some io_load contest benchmarks with 2.4.20 with the read latency2 patch applied and varying the max bomb segments from 1-6 (SMP used to save time!) io_load: Kernel [runs] Time CPU% Loads LCPU% Ratio 2.4.20 [5] 164.9 45 31 21 4.55 2420rl2b1 [5] 93.5 81 18 22 2.58 2420rl2b2 [5] 88.2 87 16 22 2.44 2420rl2b4 [5] 87.8 84 17 22 2.42 2420rl2b6 [5] 100.3 77 19 22 2.77 io_other: Kernel [runs] Time CPU% Loads LCPU% Ratio 2.4.20 [5] 89.6 86 17 21 2.47 2420rl2b1 [3] 48.1 156 9 21 1.33 2420rl2b2 [3] 50.0 149 9 21 1.38 2420rl2b4 [5] 51.9 141 10 21 1.43 2420rl2b6 [5] 52.1 142 9 20 1.44 There seems to be a limit to the benefit of decreasing max bomb segments. It does not seem to have a significant effect on io load on another hard disk (although read latency2 is overall much better than vanilla). Con -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.0 (GNU/Linux) iD8DBQE98YUEF6dfvkL3i1gRAn4kAJ4x414sM3G+8fVrXv2P0huRhNKicgCgqFyo kCXIKMVtO/Zp+tM92qlUz4s= =HOKs -----END PGP SIGNATURE----- - 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/