From owner-freebsd-stable@FreeBSD.ORG Thu Dec 15 15:04:28 2011 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 6D356106564A; Thu, 15 Dec 2011 15:04:28 +0000 (UTC) (envelope-from lars@e-new.0x20.net) Received: from mail.0x20.net (mail.0x20.net [IPv6:2001:aa8:fffb:1::3]) by mx1.freebsd.org (Postfix) with ESMTP id E837E8FC1C; Thu, 15 Dec 2011 15:04:27 +0000 (UTC) Received: from mail.0x20.net (mail.0x20.net [217.69.76.211]) by mail.0x20.net (Postfix) with ESMTP id B44916A6619; Thu, 15 Dec 2011 16:04:26 +0100 (CET) X-Virus-Scanned: amavisd-new at mail.0x20.net Received: from mail.0x20.net ([217.69.76.211]) by mail.0x20.net (mail.0x20.net [217.69.76.211]) (amavisd-new, port 10024) with ESMTP id UFt6g4reHwxF; Thu, 15 Dec 2011 16:04:26 +0100 (CET) Received: from e-new.0x20.net (mail.0x20.net [IPv6:2001:aa8:fffb:1::3]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.0x20.net (Postfix) with ESMTPS id 6601D6A61CD; Thu, 15 Dec 2011 16:04:26 +0100 (CET) Received: from e-new.0x20.net (localhost [127.0.0.1]) by e-new.0x20.net (8.14.4/8.14.4) with ESMTP id pBFF4QFp060435; Thu, 15 Dec 2011 16:04:26 +0100 (CET) (envelope-from lars@e-new.0x20.net) Received: (from lars@localhost) by e-new.0x20.net (8.14.4/8.14.4/Submit) id pBFF4OUM059271; Thu, 15 Dec 2011 16:04:24 +0100 (CET) (envelope-from lars) Date: Thu, 15 Dec 2011 16:04:24 +0100 From: Lars Engels To: Steven Hartland Message-ID: <20111215150424.GO54469@e-new.0x20.net> References: <4EE1EAFE.3070408@m5p.com> <4EE2AE64.9060802@m5p.com> <4EE88343.2050302@m5p.com> <4EE933C6.4020209@zedat.fu-berlin.de> <20111215004205.GA11556@icarus.home.lan> <4eea1a4a.nJRbEc1jgKpVnVk4%perryh@pluto.rain.com> <5350EDAC93604B6E93EDBD65A3038F88@multiplay.co.uk> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="PWWBnvahXisRTnWJ" Content-Disposition: inline In-Reply-To: <5350EDAC93604B6E93EDBD65A3038F88@multiplay.co.uk> X-Editor: VIM - Vi IMproved 7.3 X-Operation-System: FreeBSD 8.2-RELEASE-p3 User-Agent: Mutt/1.5.21 (2010-09-15) Cc: tevans.uk@googlemail.com, perryh@pluto.rain.com, attilio@freebsd.org, george+freebsd@m5p.com, freebsd-stable@freebsd.org, ohartman@zedat.fu-berlin.de, freebsd@jdc.parodius.com Subject: Re: SCHED_ULE should not be the default X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 15 Dec 2011 15:04:28 -0000 --PWWBnvahXisRTnWJ Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Dec 15, 2011 at 02:20:04PM -0000, Steven Hartland wrote: > With all the discussion I thought I'd give a buildworld > benchmark a go here on a spare 24 core machine. ULE > tested fine but with 4BSD it wont even boot panicing > with the following:- > http://screensnapr.com/v/hwysGV.png >=20 > This is on a clean 8.2-RELEASE-p4 >=20 > Upgrading to RELENG_9 fixed this but its a bit concerning > that just changing the scheduler would cause the machine > to panic on boot. >=20 > Its only a single run so varience could be high but here's > the result of a buildworld on this machine running the > two different schedulers:- > 4BSD: 24m54.10s real 2h43m12.42s user 56m20.07s sys > ULE: 23m54.68s real 2h34m59.04s user 50m59.91s sys >=20 > What really sticks out is that this is over double that > of an 8.2 buildworld on the same machine with the same > kernel > ULE: 11m12.76s real 1h27m59.39s user 28m59.57s sys 9.0 ships with gcc and clang which both need to be compiled, 8.2 only has gcc. >=20 > This was run 9.0-PRERELEASE kernel due to 4BSD panicing > on boot under 8.2. >=20 > So for this use ULE vs 4BSD is neither here-nor-there > but 9.0 buildworld is very slow (x2 slower) compared > with 8.2 so whats a bigger question in my mind. >=20 > Regards > Steve --PWWBnvahXisRTnWJ Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.18 (FreeBSD) iEYEARECAAYFAk7qDHgACgkQKc512sD3afjIYwCgn3jnoJIKN8DZCxYJTP+SXF/7 wWUAn1a4d2gUG9DvPx/qscebVHUAXg2y =lqnD -----END PGP SIGNATURE----- --PWWBnvahXisRTnWJ--