From owner-freebsd-questions@FreeBSD.ORG Sat Sep 29 17:08:56 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 4A76C16A469 for ; Sat, 29 Sep 2007 17:08:56 +0000 (UTC) (envelope-from almarrie@gmail.com) Received: from ug-out-1314.google.com (ug-out-1314.google.com [66.249.92.173]) by mx1.freebsd.org (Postfix) with ESMTP id B85E213C46A for ; Sat, 29 Sep 2007 17:08:55 +0000 (UTC) (envelope-from almarrie@gmail.com) Received: by ug-out-1314.google.com with SMTP id a2so1926815ugf for ; Sat, 29 Sep 2007 10:08:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=beta; h=domainkey-signature:received:received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; bh=2BStyXO2G+0lvKSSuI5OeCRxMdREkCPptXE3SqrvhvY=; b=jcdyr2AUUREcRC8bZ6B0zTyFjoY3lQDPQKw8jzTRZrWXTGpTZ/Iup6QOR1iY51j2b259lOIRexkwK7CqUJv9TENchVhlBoB+XnPJMtmAfxHA8gTe2kZ4v/j+vl62T1cWZXX4WKPrK+gQTjGzCQIa7A/1Qv04fJNxDS88pmiWCWU= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=iluyZNF3haSM4i7b6Y7PVgqPTiNuAaptAxyLz14fxLZmCjvpMvSx/A6z8m+/DN53k6/Ac2N6cwRSzXOPxeUWoaAM438noLAR3KH6bq2MpMh6ldeSy4p2THxzu4uZgLuYf88uVngJNJ0fTcR1feqRGxDJYOl05no+zE+RaYo//ig= Received: by 10.67.196.4 with SMTP id y4mr135673ugp.1191085734100; Sat, 29 Sep 2007 10:08:54 -0700 (PDT) Received: by 10.86.2.1 with HTTP; Sat, 29 Sep 2007 10:08:53 -0700 (PDT) Message-ID: <499c70c0709291008y3d42adc4u68fa0f717088f94e@mail.gmail.com> Date: Sat, 29 Sep 2007 20:08:53 +0300 From: "Abdullah Ibn Hamad Al-Marri" To: "Kris Kennaway" In-Reply-To: <46FE8120.4040608@FreeBSD.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <80f4f2b20709240723m121aad88ofaf728f384dd6c20@mail.gmail.com> <20070924184415.7bffd7d2@gumby.homeunix.com.> <46FE790A.1000101@FreeBSD.org> <20070929163116.GA1748@olymp.home> <46FE8120.4040608@FreeBSD.org> Cc: freebsd-questions@freebsd.org 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 17:08:56 -0000 On 9/29/07, Kris Kennaway wrote: > Oliver Herold wrote: > > Are there any numbers or technical papers? Just out of curiosity. > > I ran a mysql benchmark against Dragonfly-current and FreeBSD 7 on an > 8-core machine (one of the workloads that FreeBSD now performs very well > at) and found 0 scaling on dragonfly. Their developers confirmed that > the kernel is still entirely giant locked (as in FreeBSD 4) so no SMP > performance benefits are possible. > > The email thread is here: > > http://leaf.dragonflybsd.org/mailarchive/users/2007-05/msg00134.html > > although the linked graph is offline. The FreeBSD curve was essentially > this one (FreeBSD has improved further since then): > > http://people.freebsd.org/~kris/scaling/scaling.png > > with dragonfly a flat line at ~500 tps independent of load. > > Kris How does NetBSD, and OpenBSD scale when it comes to SMP comparing to FreeBSD 7.0? -- Regards, -Abdullah Ibn Hamad Al-Marri Arab Portal http://www.WeArab.Net/