Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758884AbYCYW3W (ORCPT ); Tue, 25 Mar 2008 18:29:22 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753751AbYCYW3K (ORCPT ); Tue, 25 Mar 2008 18:29:10 -0400 Received: from smtp1.linux-foundation.org ([140.211.169.13]:59671 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752533AbYCYW3J (ORCPT ); Tue, 25 Mar 2008 18:29:09 -0400 Date: Tue, 25 Mar 2008 15:28:09 -0700 From: Andrew Morton To: "Siddha, Suresh B" , Ingo Molnar , Thomas Gleixner Cc: bugme-daemon@bugzilla.kernel.org, linux-kernel@vger.kernel.org, "Rafael J. Wysocki" Subject: Re: [Bug 10328] New: [regression] performance drop for glx Message-Id: <20080325152809.e2b07251.akpm@linux-foundation.org> In-Reply-To: References: X-Mailer: Sylpheed version 2.2.4 (GTK+ 2.8.20; i486-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1973 Lines: 63 (switched to email. Please respond via emailed reply-to-all, not via the bugzilla web interface). On Tue, 25 Mar 2008 15:11:15 -0700 (PDT) bugme-daemon@bugzilla.kernel.org wrote: > http://bugzilla.kernel.org/show_bug.cgi?id=10328 > > Summary: [regression] performance drop for glx > Product: Memory Management > Version: 2.5 > KernelVersion: 2.6.25-rc6 > Platform: All > OS/Version: Linux > Tree: Mainline > Status: NEW > Severity: normal > Priority: P1 > Component: Other > AssignedTo: akpm@osdl.org > ReportedBy: bug-track@fisher-privat.net > > > after commit 4138cc3418f5eaa7524ff8e927102863f1ba0ea5 i expirience some grafik > related perfomance issues. > > I used glxgears for test. > before this patch: 1281.005 FPS > and after: 765.000 FPS It nearly halved. > latest tested commit a4083c9271e0a697278e089f2c0b9a95363ada0a > still hase bad performance. > > I use Pentium D with 2GB RAM, Grafick: i945G, ICH7 > That's : commit 4138cc3418f5eaa7524ff8e927102863f1ba0ea5 : Author: Siddha, Suresh B : Date: Wed Jan 30 13:33:43 2008 +0100 : : x86: set strong uncacheable where UC is really desired : : Also use _PAGE_PWT for all the mappings which need uncache mapping. : Instead of existing PAT2 which is UC- (and can be overwritten by MTRRs), : we now use PAT3 which is strong uncacheable. : : This makes it consistent with pgprot_noncached() : : Signed-off-by: Suresh Siddha : Signed-off-by: Ingo Molnar : Signed-off-by: Thomas Gleixner : -- 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/