From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Morton Subject: Re: Fw: framebuffer blitting performance loss 2.6.12 -> 2.6.13-rc3 Date: Fri, 29 Jul 2005 00:17:35 -0700 Message-ID: <20050729001735.5934622f.akpm@osdl.org> References: <20050715033912.1cd9b6c3.akpm@osdl.org> <200507221158.23454.adaplas@gmail.com> Reply-To: linux-fbdev-devel@lists.sourceforge.net Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: Received: from sc8-sf-mx2-b.sourceforge.net ([10.3.1.92] helo=mail.sourceforge.net) by sc8-sf-list1.sourceforge.net with esmtp (Exim 4.30) id 1DyP92-0007BD-PM for linux-fbdev-devel@lists.sourceforge.net; Fri, 29 Jul 2005 00:19:00 -0700 Received: from smtp.osdl.org ([65.172.181.4]) by mail.sourceforge.net with esmtps (TLSv1:DES-CBC3-SHA:168) (Exim 4.44) id 1DyP90-0005V8-AW for linux-fbdev-devel@lists.sourceforge.net; Fri, 29 Jul 2005 00:19:00 -0700 In-Reply-To: <200507221158.23454.adaplas@gmail.com> Sender: linux-fbdev-devel-admin@lists.sourceforge.net Errors-To: linux-fbdev-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Id: List-Post: List-Help: List-Subscribe: , List-Archive: Content-Type: text/plain; charset="us-ascii" To: linux-fbdev-devel@lists.sourceforge.net Cc: adaplas@gmail.com, Knut_Petersen@t-online.de "Antonino A. Daplas" wrote: > > On Friday 15 July 2005 18:39, Andrew Morton wrote: > > Begin forwarded message: > > > > Date: Fri, 15 Jul 2005 12:14:37 +0200 > > From: Knut Petersen > > To: linux-kernel@vger.kernel.org > > Subject: framebuffer blitting performance loss 2.6.12 -> 2.6.13-rc3 > > > > > > Hi everybody! > > > > There is a serious performance loss between 2.6.12 and 2.6.13-rc3 > > affecting _all_ framebuffer devices, especially those with fast > > bitblit functions. > > > > I haven't seen any significant performance penalty, between 2.6.12-rc5-mm1 > and 2.6.13-rc3-mm1. > > Based on your results, I would pinpoint the culprit to be in > video/console/bitblit.c. However, the changes there are minor, and should not > alter the peformance. > So.. what happened here? Is the problem still present in 2.6.13-rc4? ------------------------------------------------------- SF.Net email is Sponsored by the Better Software Conference & EXPO September 19-22, 2005 * San Francisco, CA * Development Lifecycle Practices Agile & Plan-Driven Development * Managing Projects & Teams * Testing & QA Security * Process Improvement & Measurement * http://www.sqe.com/bsce5sf