Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754346Ab2HNMlM (ORCPT ); Tue, 14 Aug 2012 08:41:12 -0400 Received: from bar.sig21.net ([80.81.252.164]:45678 "EHLO bar.sig21.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753916Ab2HNMlL (ORCPT ); Tue, 14 Aug 2012 08:41:11 -0400 Date: Tue, 14 Aug 2012 14:39:37 +0200 From: Johannes Stezenbach To: "Markus F.X.J. Oberhumer" Cc: linux-kernel@vger.kernel.org, Andi Kleen , chris.mason@fusionio.com, linux-btrfs@vger.kernel.org, Nitin Gupta , Richard Purdie , richard -rw- weinberger , linux-arm-kernel@lists.infradead.org Subject: Re: [GIT PULL] Update LZO compression Message-ID: <20120814123937.GA14756@sig21.net> References: <50299142.2030504@oberhumer.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <50299142.2030504@oberhumer.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-Spam-21-Score: -2.9 (--) X-Spam-21-Report: No, score=-2.9 required=8.0 tests=ALL_TRUSTED=-1,BAYES_00=-1.9 autolearn=ham Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1454 Lines: 31 On Tue, Aug 14, 2012 at 01:44:02AM +0200, Markus F.X.J. Oberhumer wrote: > On 2012-07-16 20:30, Markus F.X.J. Oberhumer wrote: > > > > As stated in the README this version is significantly faster (typically more > > than 2 times faster!) than the current version, has been thoroughly tested on > > x86_64/i386/powerpc platforms and is intended to get included into the > > official Linux 3.6 or 3.7 release. > > > > I encourage all compression users to test and benchmark this new version, > > and I also would ask some official LZO maintainer to convert the updated > > source files into a GIT commit and possibly push it to Linus or linux-next. Sorry for not reporting earlier, but I didn't have time to do real benchmarks, just a quick test on ARM926EJ-S using barebox, and found in the new version decompression is slower: http://lists.infradead.org/pipermail/barebox/2012-July/008268.html BTW, do you have userspace code matching the old and new lzo versions? It would be easier to benchmark. Unfortunately I cannot claim high confidence in my benchmark results due to missing time to do it properly, it would be useful if someone else could do some benchmarks on ARM before merging this. Johannes -- 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/