From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from gate.crashing.org (gate.crashing.org [63.228.1.57]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTP id 9DC0CDE097 for ; Sat, 26 Jan 2008 11:46:12 +1100 (EST) Subject: Re: ppc32: Weird process scheduling behaviour with 2.6.24-rc From: Benjamin Herrenschmidt To: Michel =?ISO-8859-1?Q?D=E4nzer?= In-Reply-To: <1201273484.6090.12.camel@thor.sulgenrain.local> References: <1200659696.23161.81.camel@thor.sulgenrain.local> <1201013786.4726.28.camel@thor.sulgenrain.local> <1201090699.9052.39.camel@thor.sulgenrain.local> <1201092131.6341.51.camel@lappy> <1201244082.6815.128.camel@pasglop> <1201260867.6293.38.camel@thor.sulgenrain.local> <1201273484.6090.12.camel@thor.sulgenrain.local> Content-Type: text/plain; charset=utf-8 Date: Sat, 26 Jan 2008 08:10:29 +1100 Message-Id: <1201295429.6815.145.camel@pasglop> Mime-Version: 1.0 Cc: linuxppc-dev@ozlabs.org, Ingo Molnar , Peter Zijlstra , vatsa Reply-To: benh@kernel.crashing.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Fri, 2008-01-25 at 16:04 +0100, Michel Dänzer wrote: > > Hmm, interesting. As I said before, I thought I had tested with this > > disabled and not seen a difference, but I'll try again to confirm. > > So, 2.6.24 final is indeed much better with this disabled, but still > not > as good as 2.6.23: While I can reliably move a window again while the > infinite loop is running, it still stutters badly every couple of > seconds. With 2.6.23 this is smooth all the time. This is with or without fair group scheduler enabled ? Ben.