From owner-freebsd-questions@FreeBSD.ORG Tue Sep 18 01:01:00 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 7146E16A421 for ; Tue, 18 Sep 2007 01:01:00 +0000 (UTC) (envelope-from kris@FreeBSD.org) Received: from weak.local (hub.freebsd.org [IPv6:2001:4f8:fff6::36]) by mx1.freebsd.org (Postfix) with ESMTP id 6AE2313C45D; Tue, 18 Sep 2007 01:00:59 +0000 (UTC) (envelope-from kris@FreeBSD.org) Message-ID: <46EF234C.3060908@FreeBSD.org> Date: Tue, 18 Sep 2007 03:01:00 +0200 From: Kris Kennaway User-Agent: Thunderbird 2.0.0.6 (Macintosh/20070728) MIME-Version: 1.0 To: karol.kwiat@gmail.com References: <26ddd1750709141351i3646e9bdg8d8b7e93461167f9@mail.gmail.com> <26ddd1750709151014x2112b022r9bcb999fbf1e7e49@mail.gmail.com> <46EC270A.3020100@FreeBSD.org> <8cb6106e0709151421h7bfdeb6fo7dc671820294e9c7@mail.gmail.com> <46EC4F59.7070104@FreeBSD.org> <20070917084559.K71196@wojtek.tensor.gdynia.pl> <46EF1624.1050006@gmail.com> In-Reply-To: <46EF1624.1050006@gmail.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Wojciech Puchar , freebsd-questions@freebsd.org Subject: Re: Building a new workstation - dual or quad-core CPU for FreeBSD 7? 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: Tue, 18 Sep 2007 01:01:00 -0000 Karol Kwiatkowski wrote: > Wojciech Puchar wrote: >>> Yes, 4BSD is still the default, although you definitely want to use >>> ULE for performance reasons (NB: only on 7, dont use ULE on 6). I >>> don't know whether the release engineers plan to change that default, >>> but I will check. >> could you point to some URL/explain what's the actual difference. > > You may want to check Jeff Roberson's blog site. Kris posted some graphs > on his site, too. Since it's about CURRENT, some results might be > outdated already. Unfortunately my graphs are offline (the machine that was hosting them is being shipped trans-atlantically). There is still a pdf in www.freebsd.org/~kris/scaling though. It is slightly out of date: thesedays peak mysql performance is about 10-15% higher, with no scaling bottlenecks in the kernel on 8 CPUs (i.e. mysql itself is the only thing unable to scale to high loads due to bottlenecks and contention in the mysql userland code). postgresql performance is about 20-25% higher too (and 50-60% better performance than mysql). Some of these improvements come from work that will not be committed until after the 7.0 branch though. Kris