From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261865AbVDCTGT (ORCPT ); Sun, 3 Apr 2005 15:06:19 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261868AbVDCTGT (ORCPT ); Sun, 3 Apr 2005 15:06:19 -0400 Received: from e4.ny.us.ibm.com ([32.97.182.144]:42668 "EHLO e4.ny.us.ibm.com") by vger.kernel.org with ESMTP id S261865AbVDCTGQ (ORCPT ); Sun, 3 Apr 2005 15:06:16 -0400 Subject: Re: AIM9 slowdowns between 2.6.11 and 2.6.12-rc1 From: Dave Hansen To: Mel Gorman Cc: Linux Memory Management List , Linux Kernel Mailing List In-Reply-To: References: Content-Type: text/plain Date: Sun, 03 Apr 2005 12:06:10 -0700 Message-Id: <1112555170.7189.34.camel@localhost> Mime-Version: 1.0 X-Mailer: Evolution 2.0.3 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Sun, 2005-04-03 at 15:37 +0100, Mel Gorman wrote: > While testing the page placement policy patches on 2.6.12-rc1, I noticed > that aim9 is showing significant slowdowns on page allocation-related > tests. An excerpt of the results is at the end of this mail but it shows > that page_test is allocating 18000 less pages. > > I did not check who has been recently changing the buddy allocator but > they might want to run a benchmark or two to make sure this is not > something specific to my setup. Can you get some kernel profiles to see what, exactly, is causing the decreased performance? Also, what kind of system do you have? Does backing this out help? If not, can you test some BK snapshots to see when this started occurring? http://linus.bkbits.net:8080/linux-2.5/cset@422de02c1628MP_noKSum9sGlTaC-Q -- Dave