From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752556AbXCEAHx (ORCPT ); Sun, 4 Mar 2007 19:07:53 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752558AbXCEAHw (ORCPT ); Sun, 4 Mar 2007 19:07:52 -0500 Received: from smtp13.wxs.nl ([195.121.247.4]:39352 "EHLO smtp13.wxs.nl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752556AbXCEAHw (ORCPT ); Sun, 4 Mar 2007 19:07:52 -0500 Date: Mon, 05 Mar 2007 01:10:19 +0100 From: jos poortvliet X-Face: $0>4o"Xx2u2q(Tx!D+6~yPc{ZhEfnQnu:/nthh%Kr%f$aiATk$xjx^X4admsd*)=?utf-8?q?IZz=3A=5FkT=0A=09=7CurITP!=2E?=)L`*)Vw@4\@6>#r;3xSPW`,~C9vb`W/s]}Gq]b!o_/+(lJ:b)=?utf-8?q?T0=26KCLMGvG=7CS=5E=0A=09z=7B=5C=2E7EtehxhFQE=27eYSsir/=7CtQ?= =?utf-8?q?j=23rWQe4o?=>WC>_R To: ck@vds.kolivas.org Cc: Willy Tarreau , Con Kolivas , Al Boldi , linux-kernel@vger.kernel.org Message-id: <200703050110.23629.jos@mijnkamer.nl> MIME-version: 1.0 Content-type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary=nextPart26075550.mzCSgbD4dv Content-transfer-encoding: 7bit User-Agent: KMail/1.9.5 + Features References: <200703042335.26785.a1426z@gawab.com> <200703050849.29674.kernel@kolivas.org> <20070304231312.GA2268@1wt.eu> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org --nextPart26075550.mzCSgbD4dv Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Op Monday 05 March 2007, schreef Willy Tarreau: > On Mon, Mar 05, 2007 at 08:49:29AM +1100, Con Kolivas wrote: > (...) > > > > That's just what it did, but when you "nice make -j4", things (gears) > > > start to stutter. Is that due to the staircase? > > > > gears isn't an interactive task. Apart from using it as a background load > > to check for starvation because it loads up the cpu fully (which a gpu > > intensive but otherwise simple app like this should _not_ do) graphics > > card drivers and interrupts and so on, I wouldn't put much credence on > > gears as anything else. However I suspect that gears will still get a > > fair share of the cpu on RSDL which almost never happens on any other > > scheduler. > > Con, > > I've now given it a try with HZ=250 on my dual-athlon. It works > beautifully. I also quickly checked that playing mp3 doesn't skip during > make -j4, and that gears runs fairly smoothly, since those are the > references people often use. > > But with real work, it's excellent too. When I saturate my CPUs by > injecting HTTP traffic on haproxy, the load is stable and the command line > perfectly responsive, while in the past the load would oscillate and the > command line sometimes stopped to respond for a few seconds. > > I've also launched my scheddos program (you may remember, the one we did a > few experiments with). I could not cause any freeze at all. Plain 2.6.20 > had already improved a lot in this area, but above 4 processes/CPU, > occasional short freezes did still occur. This time, even at 100 processes, > the system was rather slow (of course!) but just as expected, and nothing > more. > > I also tried the good old "dd if=/dev/zero bs=1|...|dd bs=1 of=/dev/null" > and it did not cause any trouble. > > I will boot 2.6 slightly more often to test the code under various > conditions, and I will recommend it to a few people I know who tend to > switch back to 2.4 after one day full of 2.6 jerkiness. > > Overall, you have done a great job ! > > I hope that more people will give it a try, first to help find possible > remaining bugs, and to pronounce in favour of its inclusion in mainline. > > Cheers, > Willy Sounds nice... you might want to put this in the -ck wiki: ck.wikia.com/ --nextPart26075550.mzCSgbD4dv Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iD8DBQBF61/v+wgQ1AD35iwRAtACAJ48h9RN74QMLBhZf6OSPVJVCYkH/QCbB6G3 oiAAL03+AYhGKM+e66cIC4o= =mqIX -----END PGP SIGNATURE----- --nextPart26075550.mzCSgbD4dv--