From owner-freebsd-questions@FreeBSD.ORG Sat Sep 29 16:31:20 2007 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 8563816A417 for ; Sat, 29 Sep 2007 16:31:20 +0000 (UTC) (envelope-from oliver@akephalos.de) Received: from mailout05.sul.t-online.com (mailout05.sul.t-online.de [194.25.134.82]) by mx1.freebsd.org (Postfix) with ESMTP id 42E6E13C461 for ; Sat, 29 Sep 2007 16:31:20 +0000 (UTC) (envelope-from oliver@akephalos.de) Received: from fwd32.aul.t-online.de by mailout05.sul.t-online.com with smtp id 1IbfDq-0004kX-05; Sat, 29 Sep 2007 18:31:18 +0200 Received: from localhost (Xd0MLwZYrtWvFdctBZ-8HO76bOYqUXrmW75A04nN4uN+GgN+GGskfGfLDAbrNSp8zvye8mLDKu@[84.165.120.121]) by fwd32.t-online.de with esmtp id 1IbfDo-05mIj20; Sat, 29 Sep 2007 18:31:16 +0200 Date: Sat, 29 Sep 2007 18:31:16 +0200 From: Oliver Herold To: freebsd-questions@freebsd.org Message-ID: <20070929163116.GA1748@olymp.home> Mail-Followup-To: freebsd-questions@freebsd.org References: <80f4f2b20709240723m121aad88ofaf728f384dd6c20@mail.gmail.com> <20070924184415.7bffd7d2@gumby.homeunix.com.> <46FE790A.1000101@FreeBSD.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <46FE790A.1000101@FreeBSD.org> User-Agent: Mutt/1.5.16 (2007-06-09) X-ID: Xd0MLwZYrtWvFdctBZ-8HO76bOYqUXrmW75A04nN4uN+GgN+GGskfGfLDAbrNSp8zvye8mLDKu X-TOI-MSGID: ce20c40e-0887-43b7-9c09-be4f05cdd5b1 Subject: Re: Questions on the scheduler X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 29 Sep 2007 16:31:20 -0000 Are there any numbers or technical papers? Just out of curiosity. Cheers, Oliver On Sat, Sep 29, 2007 at 06:10:50PM +0200, Kris Kennaway wrote: > RW wrote: > >> The FreeBSD response was to make the kernel more SMP friendly with >> finer-grained locking, and to bring-in the ULE scheduler. Dragonfly BSD >> was a fork off 4.x by people who thought a more radical kernel rewrite >> was needed. Their kernel avoids a lot of the locking problems by using >> message queues. > > Just to clarify, that was the theory and intention behind Dragonfly, but in > practise they have yet to achieve it after 4 years and any benefits of > their ideas remain unproven. Basically they have achieved no performance > gains on SMP and have effectively abandoned working on it. > > Kris > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to > "freebsd-questions-unsubscribe@freebsd.org" -- Why did the Lord give us so much quickness of movement unless it was to avoid responsibility with?