From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1767613AbXCIXC4 (ORCPT ); Fri, 9 Mar 2007 18:02:56 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1767616AbXCIXC4 (ORCPT ); Fri, 9 Mar 2007 18:02:56 -0500 Received: from mail30.syd.optusnet.com.au ([211.29.133.193]:49659 "EHLO mail30.syd.optusnet.com.au" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1767613AbXCIXCz (ORCPT ); Fri, 9 Mar 2007 18:02:55 -0500 From: Con Kolivas To: Matt Mackall Subject: Re: 2.6.21-rc3-mm1 RSDL results Date: Sat, 10 Mar 2007 10:02:37 +1100 User-Agent: KMail/1.9.5 Cc: linux-kernel , akpm@linux-foundation.org References: <20070309053931.GA10459@waste.org> <200703100918.05547.kernel@kolivas.org> <20070309222923.GK10394@waste.org> In-Reply-To: <20070309222923.GK10394@waste.org> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200703101002.37920.kernel@kolivas.org> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Saturday 10 March 2007 09:29, Matt Mackall wrote: > On Sat, Mar 10, 2007 at 09:18:05AM +1100, Con Kolivas wrote: > > On Saturday 10 March 2007 08:57, Con Kolivas wrote: > > > On Saturday 10 March 2007 08:39, Matt Mackall wrote: > > > > So what's different between makes in parallel and make -j 5? Make's > > > > job server uses pipe I/O to control how many jobs are running. > > > > > > Hmm it must be those deep pipes again then. I removed any quirks > > > testing for those from mainline as I suspected it would be ok. Guess > > > I"m wrong. > > > > I shouldn't blame this straight up though if NO_HZ makes it better. > > Something else is going wrong... wtf though? > > Just so we're clear, dynticks has only 'fixed' the single non-parallel > make load so far. Ok, back to the pipe idea. Without needing a kernel recompile, can you try running the make -j5 as a SCHED_BATCH task? This wrapper will make it possible: http://freequaos.host.sk/schedtool/schedtool-1.2.9.tar.bz2 then schedtool -B -e make -j5 If that helps it gives me something to work with. -- -ck