From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753360Ab2AWQTu (ORCPT ); Mon, 23 Jan 2012 11:19:50 -0500 Received: from mail.servus.at ([193.170.194.20]:44544 "EHLO mail.servus.at" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752785Ab2AWQTs (ORCPT ); Mon, 23 Jan 2012 11:19:48 -0500 Message-ID: <4F1D889C.2050706@oberhumer.com> Date: Mon, 23 Jan 2012 17:19:40 +0100 From: "Markus F.X.J. Oberhumer" Organization: oberhumer.com User-Agent: Mozilla/5.0 (X11; Linux i686 on x86_64; rv:9.0) Gecko/20111222 Thunderbird/9.0.1 MIME-Version: 1.0 To: linux-kernel@vger.kernel.org CC: Andi Kleen , chris.mason@oracle.com, linux-btrfs@vger.kernel.org, Nitin Gupta , Richard Purdie Subject: ANN: linux-kernel-lzo-2.06.20120123 - update LZO to v2.06 References: <1326414530-10789-1-git-send-email-andi@firstfloor.org> <4F16DFB0.2060404@oberhumer.com> In-Reply-To: <4F16DFB0.2060404@oberhumer.com> X-no-Archive: yes X-Oberhumer-Conspiracy: There is no conspiracy. Trust us. Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, I've prepared a small package that updates the LZO version in the Linux kernel to LZO v2.06. Please get it from: http://www.oberhumer.com/opensource/lzo/download/Testing/linux-kernel-lzo-2.06.20120123.tar.gz As stated in the README, its main purpose is to allow easy benchmarking of the latest LZO versions - these do feature some nice speed improvements, and while I have done a lot of synthetic benchmarking I'm really very curious and appreciate feedback on "real-world" performance numbers like usage in btrfs and zram. Share and enjoy, Markus http://www.oberhumer.com/opensource/lzo/ On 2012-01-18 16:05, Markus F.X.J. Oberhumer wrote: > On 2012-01-13 01:28, Andi Kleen wrote: >> Here's a slightly updated version of the BTRFS snappy interface. >> snappy is a faster compression algorithm that provides similar >> compression as LZO, but generally better performance. > > I'd like to note that the LZO version in the current Linux kernel is > rather outdated - it seems to be based on the 2005 release. > > In fact the latest version LZO 2.06 does compress both slightly faster and > better than snappy 1.0.4 when benchmarking the Calgary and Silesia > compression corpus (tested with gcc 4.6 on Nehalem & Sandy Bridge). > > Furthermore please be aware that from a pure compression point of view > snappy et al. are very close cousins of LZO (strictly byte-aligned LZ77) > that mainly differ in implementation issues like using a table to > number of branches - and indeed similar optimizations could be applied > to any version. > > I'm not sure if there is an official kernel maintainer of LZO, but I'd > offer to assist you updating to the latest version and eliminating > any possible performance issues. -- Markus Oberhumer, , http://www.oberhumer.com/