From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933214AbXCKGUF (ORCPT ); Sun, 11 Mar 2007 01:20:05 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S933217AbXCKGUE (ORCPT ); Sun, 11 Mar 2007 01:20:04 -0500 Received: from mail32.syd.optusnet.com.au ([211.29.132.63]:37261 "EHLO mail32.syd.optusnet.com.au" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933214AbXCKGUC (ORCPT ); Sun, 11 Mar 2007 01:20:02 -0500 From: Con Kolivas To: Matt Mackall Subject: Re: RSDL-mm 0.28 Date: Sun, 11 Mar 2007 17:19:38 +1100 User-Agent: KMail/1.9.5 Cc: linux-kernel , Andrew Morton , ck@vds.kolivas.org References: <20070311013506.GD10459@waste.org> <20070311040132.GS10394@waste.org> <20070311040305.GT10394@waste.org> In-Reply-To: <20070311040305.GT10394@waste.org> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200703111719.38514.kernel@kolivas.org> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Sunday 11 March 2007 15:03, Matt Mackall wrote: > On Sat, Mar 10, 2007 at 10:01:32PM -0600, Matt Mackall wrote: > > On Sun, Mar 11, 2007 at 01:28:22PM +1100, Con Kolivas wrote: > > > Ok I don't think there's any actual accounting problem here per se > > > (although I did just recently post a bugfix for rsdl however I think > > > that's unrelated). What I think is going on in the ccache testcase is > > > that all the work is being offloaded to kernel threads reading/writing > > > to/from the filesystem and the make is not getting any actual cpu > > > time. > > > > I don't see significant system time while this is happening. > > Also, it's running pretty much entirely out of page cache so there > wouldn't be a whole lot for kernel threads to do. Well I can't reproduce that behaviour here at all whether from disk or the pagecache with ccache, so I'm not entirely sure what's different at your end. However both you and the other person reporting bad behaviour were using ATI drivers. That's about the only commonality? I wonder if they do need to yield... somewhat instead of not at all. -- -ck