From owner-svn-src-head@FreeBSD.ORG Mon Jul 8 02:25:42 2013 Return-Path: Delivered-To: svn-src-head@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by hub.freebsd.org (Postfix) with ESMTP id 370C3C4A; Mon, 8 Jul 2013 02:25:42 +0000 (UTC) (envelope-from yaneurabeya@gmail.com) Received: from mail-pb0-x22c.google.com (mail-pb0-x22c.google.com [IPv6:2607:f8b0:400e:c01::22c]) by mx1.freebsd.org (Postfix) with ESMTP id 0306C113D; Mon, 8 Jul 2013 02:25:41 +0000 (UTC) Received: by mail-pb0-f44.google.com with SMTP id uo1so3771427pbc.3 for ; Sun, 07 Jul 2013 19:25:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=references:mime-version:in-reply-to:content-type :content-transfer-encoding:message-id:cc:x-mailer:from:subject:date :to; bh=wpe7sdh37y6H4iUp/M/B/NHJpQDl/3HMVFXv0ypAx3c=; b=HSnqzRY+mU33snJhe4nuk10aZ9mbIyfpDyw1LxFbu8mrUG4MpYU/z6q+TAdBY/EtzY I5unqSYIobmcachfCs5IOqcbGUw/E8ELr6YRCDceW11Dp9hMj7YrMZgvSty+ar97X4u3 m+zgkYNQW1hx33h/D5CrhsuIxqotGGjRx9wLF+v+6phdjUpioxkBPIEQ73sODqpYdbwp 0I3I89Hi2Nq27dq7RvCfMeZZoLCgpLnS3hPgSRohYDZlbcHSITIV22xjZhHi/wWcFd88 9/2RfL97EUM/5fnJ/tvS+K2uVBdAf2yAiEJURfQfjAMf764vo2gdlXAv7gpQI7pucf/0 p7Dg== X-Received: by 10.66.164.232 with SMTP id yt8mr20952389pab.21.1373250341084; Sun, 07 Jul 2013 19:25:41 -0700 (PDT) Received: from [10.198.134.121] (mobile-166-147-081-246.mycingular.net. [166.147.81.246]) by mx.google.com with ESMTPSA id py6sm19535752pbb.33.2013.07.07.19.25.39 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Sun, 07 Jul 2013 19:25:40 -0700 (PDT) References: <201307072039.r67KdCdR028908@svn.freebsd.org> <9D4C7540-A3B0-45E5-8219-6A455D41DF70@gmail.com> <51D9DA55.2090808@freebsd.org> Mime-Version: 1.0 (1.0) In-Reply-To: <51D9DA55.2090808@freebsd.org> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Message-Id: X-Mailer: iPhone Mail (10B329) From: Garrett Cooper Subject: Re: svn commit: r253002 - head Date: Sun, 7 Jul 2013 19:25:34 -0700 To: Alfred Perlstein Cc: "svn-src-head@freebsd.org" , "svn-src-all@freebsd.org" , "src-committers@freebsd.org" X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 08 Jul 2013 02:25:42 -0000 On Jul 7, 2013, at 2:15 PM, Alfred Perlstein wrote: > On 7/7/13 2:01 PM, Garrett Cooper wrote: >> Why the magic number 12? >=20 > Numbers higher seem to result in worse performance as reported by some mem= bers of my team. The suggestion is good in spirit, but this doesn't justify the reasoning for= this recommendation for all cases. Please revert this change and add a doc page or notes to the dev handbook di= scussing what the empirical process and results were for determining this va= lue so people can come up with their own values that work best with their ha= rdware and software config. This recommendation is prone to bitrot like some= of the recommendations in tuning(7). Misinformation is sometimes more harmful than no information. Thanks, -Garrett=