From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261242AbVFHOPm (ORCPT ); Wed, 8 Jun 2005 10:15:42 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261247AbVFHOPl (ORCPT ); Wed, 8 Jun 2005 10:15:41 -0400 Received: from dvhart.com ([64.146.134.43]:30376 "EHLO localhost.localdomain") by vger.kernel.org with ESMTP id S261242AbVFHOPZ (ORCPT ); Wed, 8 Jun 2005 10:15:25 -0400 Date: Wed, 08 Jun 2005 07:15:25 -0700 From: "Martin J. Bligh" Reply-To: "Martin J. Bligh" To: Andrew Morton , Christoph Lameter Cc: linux-kernel@vger.kernel.org Subject: Re: 2.6.12-rc6-mm1 Message-ID: <528220000.1118240125@[10.10.2.4]> In-Reply-To: <20050607170853.3f81007a.akpm@osdl.org> References: <1004450000.1118188239@flay><20050607165656.2517b417.akpm@osdl.org> <20050607170853.3f81007a.akpm@osdl.org> X-Mailer: Mulberry/2.2.1 (Linux/x86) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org --Andrew Morton wrote (on Tuesday, June 07, 2005 17:08:53 -0700): > Christoph Lameter wrote: >> >> On Tue, 7 Jun 2005, Andrew Morton wrote: >> >> > > Diffprofile is wacko (HZ seems to be defaulting to 250 in -mm). >> > >> > Oh crap, so it does. That's wrong. >> >> Email by you and Linus indicated that 250 should be the default. > > Oh, OK. hrm. > > Martin, it would be useful if you could determine whether the kernbench > slowdown was due to the 1000Hz->250Hz change, thanks. > > I'm assuming it was the CPU scheduler patches. There are 36 of them ;) Is actually worse with HZ=1000 ... so I think we still have another problem, probably with scheduler patches. (the one marked -mm1+p4947 in blue is the patched one) http://ftp.kernel.org/pub/linux/kernel/people/mbligh/abat/perf/kernbench.moe.png I can back out various patches ... are all the scheduler patches starting in sched.* or something equally obvious? if not, a list of what to blat would help me ... or I'll do a crapshoot, and see what falls out ;-) M.