From owner-cvs-src@FreeBSD.ORG Mon Oct 1 14:53:03 2007 Return-Path: Delivered-To: cvs-src@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 8B02416A41A; Mon, 1 Oct 2007 14:53:03 +0000 (UTC) (envelope-from SRS0=e7ebb3db3349f9294f350cd1f0e8c13e6ad8abaf=475=es.net=oberman@es.net) Received: from postal1.es.net (postal4.es.net [IPv6:2001:400:6000:1::66]) by mx1.freebsd.org (Postfix) with ESMTP id 109DC13C43E; Mon, 1 Oct 2007 14:53:01 +0000 (UTC) (envelope-from SRS0=e7ebb3db3349f9294f350cd1f0e8c13e6ad8abaf=475=es.net=oberman@es.net) Received: from ptavv.es.net (ptavv.es.net [198.128.4.29]) by postal4.es.net (Postal Node 4) with ESMTP (SSL) id GYB89059; Mon, 01 Oct 2007 07:52:59 -0700 Received: from ptavv.es.net (ptavv.es.net [127.0.0.1]) by ptavv.es.net (Tachyon Server) with ESMTP id EC9FC4500F; Mon, 1 Oct 2007 07:52:57 -0700 (PDT) To: Bruce Evans In-Reply-To: Your message of "Mon, 01 Oct 2007 21:26:39 +1000." <20071001205923.U2657@besplex.bde.org> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="==_Exmh_1191250377_25579P"; micalg=pgp-sha1; protocol="application/pgp-signature" Content-Transfer-Encoding: 7bit Date: Mon, 01 Oct 2007 07:52:57 -0700 From: "Kevin Oberman" Message-Id: <20071001145257.EC9FC4500F@ptavv.es.net> X-Sender-IP: 198.128.4.29 X-Sender-Domain: es.net X-Recipent: ; ; ; ; ; ; ; ; X-Sender: X-To_Name: Bruce Evans X-To_Domain: optusnet.com.au X-To: Bruce Evans X-To_Email: brde@optusnet.com.au X-To_Alias: brde Cc: src-committers@freebsd.org, cvs-src@freebsd.org, Jeff Roberson , Garance A Drosehn , Ben Kaduk , cvs-all@freebsd.org, Jeff Roberson Subject: Re: cvs commit: src/sys/kern sched_ule.c X-BeenThere: cvs-src@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: CVS commit messages for the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 01 Oct 2007 14:53:03 -0000 --==_Exmh_1191250377_25579P Content-Type: text/plain; charset=us-ascii Content-Disposition: inline > Date: Mon, 1 Oct 2007 21:26:39 +1000 (EST) > From: Bruce Evans > > On Mon, 1 Oct 2007, Jeff Roberson wrote: > > > On Mon, 1 Oct 2007, Bruce Evans wrote: > > > >> On Sun, 30 Sep 2007, Jeff Roberson wrote: > >> > >>> On Sat, 29 Sep 2007, Kevin Oberman wrote: > >> > >>>> YMMV, but ULE seems to generally work better then 4BSD for interactive > >>>> uniprocessor systems. The preferred scheduler for uniprocessor servers > >>>> is less clear, but many test have shown ULE does better for those > >>>> systems in the majority of cases. > >>> > >>> I feel it's safe to say desktop behavior on UP is definitely superior. > >> > >> This is unsafe to say. > > > > Given that the overwhelming amount of feedback by qualified poeple, I think > > it's fair to say that ULE gives a more responsive system under load. > > This is not my experience. Maybe I don't run enough interactive bloatware > to have a large enough interactive load for the scheduler to make a > difference. That, or you don't run interactive on older systems with slow CPUs and limited memory. (This does NOT imply that ULE is going to help when experiencing heavy swapfile activity. I don't think anything helps that except more RAM.) The place it seem most evident to me is X responsiveness when the system (1GHz X 256MB PIII) is busy with large builds. Performance is terrible with 4BSD and only bad with ULE. Note that I am running Gnome (speaking of bloatware). The difference when running ULE is pretty dramatic. -- R. Kevin Oberman, Network Engineer Energy Sciences Network (ESnet) Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab) E-mail: oberman@es.net Phone: +1 510 486-8634 Key fingerprint:059B 2DDF 031C 9BA3 14A4 EADA 927D EBB3 987B 3751 --==_Exmh_1191250377_25579P Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (FreeBSD) Comment: Exmh version 2.5 06/03/2002 iD8DBQFHAQnJkn3rs5h7N1ERAhk4AKCHHT4trxVXK+hGymhy03BV8ZwplgCfRDXs V+lJ5AEGZKl0Nl1XwQd8Fhw= =UTNe -----END PGP SIGNATURE----- --==_Exmh_1191250377_25579P--