From owner-freebsd-current@FreeBSD.ORG Tue Aug 30 08:25:03 2011 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 8190A106564A; Tue, 30 Aug 2011 08:25:03 +0000 (UTC) (envelope-from bruce@cran.org.uk) Received: from muon.cran.org.uk (muon.cran.org.uk [IPv6:2a01:348:0:15:5d59:5c40:0:1]) by mx1.freebsd.org (Postfix) with ESMTP id 162528FC14; Tue, 30 Aug 2011 08:25:03 +0000 (UTC) Received: from muon.cran.org.uk (localhost [127.0.0.1]) by muon.cran.org.uk (Postfix) with ESMTP id 382BCE6B25; Tue, 30 Aug 2011 09:25:02 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=cran.org.uk; h=message-id :date:from:mime-version:to:cc:subject:references:in-reply-to :content-type:content-transfer-encoding; s=mail; bh=dBk/me1Zj3s6 cnct2zWjnPqHIoc=; b=RoANKaFu80S8jh/gZXNhRsnwlPmwFWVN0QxfQtPYz3S/ xoXnUh79VNZCq3tc0rCvTik0bri+Ws2Sb1aMgfwLq9zcIByT+5X8l6EwyznS1i4t y+4P1FBbYLeU1619+53cmBu/nGrhqJBduZb+faY4NVANqP2CwCV2maNjThYRDSg= DomainKey-Signature: a=rsa-sha1; c=nofws; d=cran.org.uk; h=message-id :date:from:mime-version:to:cc:subject:references:in-reply-to :content-type:content-transfer-encoding; q=dns; s=mail; b=V+eIjq D/UT+TRH2K3Hx79QF8kY12h0SyV/B/WxpJmxUrWNKeAZTZ0GIDbQnlfRx0dJfr8L Pl7FNfBq+0PgdB1B1bRpxwYjPR6O3MPEFyYet0Jj/IAbxa0wUheYWNqvMMiD9Iks apPlEYtbMtYjOOz8nN++EH2mVTueHJJJyq8Ks= Received: from [192.168.1.104] (188-222-18-231.zone13.bethere.co.uk [188.222.18.231]) (using TLSv1 with cipher DHE-RSA-CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by muon.cran.org.uk (Postfix) with ESMTPSA id E4F0BE622C; Tue, 30 Aug 2011 09:25:01 +0100 (BST) Message-ID: <4E5C9E5B.6010404@cran.org.uk> Date: Tue, 30 Aug 2011 09:24:59 +0100 From: Bruce Cran User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:6.0) Gecko/20110812 Thunderbird/6.0 MIME-Version: 1.0 To: Volodymyr Kostyrko References: <4E5941D6.9090106@zedat.fu-berlin.de> <4E5BEF65.2010502@gmail.com> In-Reply-To: <4E5BEF65.2010502@gmail.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Cc: "freebsd-performance@freebsd.org" , freebsd Current , "Hartmann, O." Subject: Re: http://www.freebsd.org/marketing/os-comparison.html X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 30 Aug 2011 08:25:03 -0000 On 29/08/2011 20:58, Volodymyr Kostyrko wrote: > = SMP = > * (?something about comparing other shedulers with SCHED_ULE), (?some > rt stuff), (?some comparison with other interesting shedulers, like > DragonflyBSD and QNX). From a recent post to -questions: "Alas, during a recent kernel build, I used the -j2 command line option in "make" and watched as the scheduler repeatedly assigned two instances of cc (the most CPU-intensive program) to the same core." I'm not sure this is something we're really better at, unfortunately: I know I've watched Windows really grok multi-socket, multi-core HyperThreaded systems and prefer real cores on the same NUMA node when running a multi-threaded application, whereas it seems FreeBSD struggles sometimes. -- Bruce Cran