From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S268372AbUHLCyI (ORCPT ); Wed, 11 Aug 2004 22:54:08 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S268374AbUHLCyI (ORCPT ); Wed, 11 Aug 2004 22:54:08 -0400 Received: from mail001.syd.optusnet.com.au ([211.29.132.142]:58781 "EHLO mail001.syd.optusnet.com.au") by vger.kernel.org with ESMTP id S268372AbUHLCyE (ORCPT ); Wed, 11 Aug 2004 22:54:04 -0400 References: <20040812022420.58366.qmail@web13909.mail.yahoo.com> Message-ID: X-Mailer: http://www.courier-mta.org/cone/ From: Con Kolivas To: spaminos-ker@yahoo.com Cc: linux-kernel@vger.kernel.org, William Lee Irwin III Subject: Re: Scheduler fairness problem on 2.6 series (Attn: Nick Piggin and others) Date: Thu, 12 Aug 2004 12:53:57 +1000 Mime-Version: 1.0 Content-Type: text/plain; format=flowed; charset="US-ASCII" Content-Disposition: inline Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org spaminos-ker@yahoo.com writes: > --- Con Kolivas wrote: >> >> Hi >> >> I tried this on the latest staircase patch (7.I) and am not getting any >> output from your script when tested up to 60 threads on my hardware. Can you >> try this version of staircase please? >> >> There are 7.I patches against 2.6.8-rc4 and 2.6.8-rc4-mm1 >> >> http://ck.kolivas.org/patches/2.6/2.6.8/ >> >> Cheers, >> Con >> >> > > One thing to note is that I do get a lot of output from the script if I set > interactive to 0 (delays between 3 and 13 seconds with 60 threads). Sounds fair. With interactive==0 it will penalise tasks during their bursts of cpu usage in the interest of fairness, and your script effectively is BASH doing a burst of cpu so 3-13 second delays when the load is effectively >60 is pretty good. Cheers, Con