From owner-freebsd-hackers@FreeBSD.ORG Mon Dec 29 23:57:25 2008 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id C910B106564A for ; Mon, 29 Dec 2008 23:57:25 +0000 (UTC) (envelope-from yuri@rawbw.com) Received: from shell.rawbw.com (shell.rawbw.com [198.144.192.42]) by mx1.freebsd.org (Postfix) with ESMTP id 9E9CA8FC16 for ; Mon, 29 Dec 2008 23:57:25 +0000 (UTC) (envelope-from yuri@rawbw.com) Received: from eagle.syrec.org (c-24-6-210-197.hsd1.ca.comcast.net [24.6.210.197]) (authenticated bits=0) by shell.rawbw.com (8.13.6/8.13.6) with ESMTP id mBTNvO6N022007; Mon, 29 Dec 2008 15:57:25 -0800 (PST) Message-ID: <495963E3.8010509@rawbw.com> Date: Mon, 29 Dec 2008 15:57:23 -0800 From: Yuri User-Agent: Thunderbird 2.0.0.18 (X11/20081127) MIME-Version: 1.0 To: Christian Weisgerber References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: freebsd-hackers@freebsd.org Subject: Re: lzo2 shows insane speed gap X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: yuri@rawbw.com List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 29 Dec 2008 23:57:26 -0000 Christian Weisgerber wrote: > > > My best guess at this time is that lzo2 somehow manages to induce > crazy cache thrashing on some CPU models. > > Ideas and explanations welcome. > Did you ask the author? He might be the best person to ask. Yuri