From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750714AbXCUI4S (ORCPT ); Wed, 21 Mar 2007 04:56:18 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750893AbXCUI4S (ORCPT ); Wed, 21 Mar 2007 04:56:18 -0400 Received: from pfepa.post.tele.dk ([195.41.46.235]:40618 "EHLO pfepa.post.tele.dk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1749667AbXCUI4R (ORCPT ); Wed, 21 Mar 2007 04:56:17 -0400 Subject: Re: RSDL v0.31 From: Kasper Sandberg To: ray-gmail@madrabbit.org Cc: Mark Lord , Linus Torvalds , Xavier Bestel , Al Boldi , Mike Galbraith , Con Kolivas , ck@vds.kolivas.org, Serge Belyshev , Ingo Molnar , linux-kernel@vger.kernel.org, Nicholas Miell , Andrew Morton In-Reply-To: <2c0942db0703200816r36544407o1f60270c5d1da7af@mail.gmail.com> References: <200703042335.26785.a1426z@gawab.com> <200703172048.46267.kernel@kolivas.org> <1174125534.7734.2.camel@Homer.simpson.net> <200703172355.30989.a1426z@gawab.com> <45FEB54A.3040602@rtr.ca> <1174321617.30876.69.camel@frg-rhel40-em64t-04> <45FEBBF5.9060002@rtr.ca> <1174322580.30876.72.camel@frg-rhel40-em64t-04> <45FFDFF8.2090208@rtr.ca> <2c0942db0703200816r36544407o1f60270c5d1da7af@mail.gmail.com> Content-Type: text/plain Date: Wed, 21 Mar 2007 09:55:29 +0100 Message-Id: <1174467329.22159.3.camel@localhost> Mime-Version: 1.0 X-Mailer: Evolution 2.4.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 2007-03-20 at 08:16 -0700, Ray Lee wrote: > On 3/20/07, Mark Lord wrote: > > I've droppped it from my machine -- interactive response is much > > more important for my primary machine right now. > > Help out with a data point? Are you running KDE as well? If you are, > then it looks like the common denominator that RSDL is handling poorly > is client-server communication. (KDE's KIO slaves in this case, but X > in general.) im not experiencing any problems with KDE. if anything ktorrent seems to be going a teeny tiny bit smoother, though its nothing i can back up with data. now i havent tested ALL kioslaves yet, but stuff like sftp, fish, tar and such works just as good. > > If so, one would hope that a variation on Linus's 2.5.63 pipe wakeup > pass-the-interactivity idea could work here. The problem with that > original patch, IIRC, was that a couple of tasks could bounce their > interactivity bonus back and forth and thereby starve others. Which > might be expected given there was no 'decaying' of the interactivity > bonus, which means you can make a feedback loop. > > Anyway, looks like processes that do A -> B -> A communication chains > are getting penalized under RSDL. In which case, perhaps I can make a > test case that exhibits the problem without having to have the same > graphics card or desktop as you. An easy-to-reproduce testcase would be good. > > Ray > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ >