From owner-freebsd-stable@FreeBSD.ORG Mon Dec 12 19:43:27 2011 Return-Path: Delivered-To: stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id EE03E106564A for ; Mon, 12 Dec 2011 19:43:27 +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 506198FC14 for ; Mon, 12 Dec 2011 19:43:27 +0000 (UTC) Received: from muon.cran.org.uk (localhost [127.0.0.1]) by muon.cran.org.uk (Postfix) with ESMTP id AD1CEE6208; Mon, 12 Dec 2011 19:43:25 +0000 (GMT) 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=KBofS3P/8735 YfGbLXBay3DOQ+w=; b=Rvk1DiqI5UkQIJwWCALJ4e/oPCrfXF6QBJmjbSxYTR2y 4slF4su6ItFEQvPmt5zsMIV/vtnk77+JcjRH2Jx9gYA51lEwGOT8TVKcql/fRujm 7g2pXydMfIM8Be0sCTTYfz4+iGSyg83UftquVutmIGX2VXvCNi2YfKW/cKBUCLk= 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=PBclhI T5FM9Ykjv+FdHcDtw6hggo59P0Tsv0SsaB7+/pURV3MMPKSva5Yvmm7hhad3ouie 8SANjss0+7+2T18zC4FAO0LBGLeMcHvANwdVMieCZDKj4oPojIgf3SXNt/PBX3by PWYl70LmHuCArs2rhZK022u0FnoxwJ+s7i2TU= Received: from [192.168.1.120] (188-220-36-32.zone11.bethere.co.uk [188.220.36.32]) (using TLSv1 with cipher DHE-RSA-CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by muon.cran.org.uk (Postfix) with ESMTPSA id 51243E6200; Mon, 12 Dec 2011 19:43:25 +0000 (GMT) Message-ID: <4EE6595C.3080608@cran.org.uk> Date: Mon, 12 Dec 2011 19:43:24 +0000 From: Bruce Cran User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:8.0) Gecko/20111105 Thunderbird/8.0 MIME-Version: 1.0 To: Garrett Wollman References: <4EE1EAFE.3070408@m5p.com> <4EE22421.9060707@gmail.com> <4EE6060D.5060201@mail.zedat.fu-berlin.de> <20111212155159.GB73597@troutmask.apl.washington.edu> <20198.21654.915449.536365@hergotha.csail.mit.edu> In-Reply-To: <20198.21654.915449.536365@hergotha.csail.mit.edu> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: stable@freebsd.org Subject: Re: SCHED_ULE should not be the default X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 12 Dec 2011 19:43:28 -0000 On 12/12/2011 19:23, Garrett Wollman wrote: > Where do you get that idea? I've never seen any evidence for this > proposition (although the claim is repeated often enough). What are > the specific circumstances that make this useful? Where did the > number come from? It's just something I've heard repeated, and people claiming that setting it improves performance. This explains how the value 224 was obtained: http://lists.freebsd.org/pipermail/freebsd-stable/2010-September/058686.html -- Bruce Cran