From owner-freebsd-arch@FreeBSD.ORG  Fri Feb 15 12:32:13 2013
Return-Path: <owner-freebsd-arch@FreeBSD.ORG>
Delivered-To: arch@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 C284629A
 for <arch@freebsd.org>; Fri, 15 Feb 2013 12:32:13 +0000 (UTC)
 (envelope-from des@des.no)
Received: from smtp.des.no (smtp.des.no [194.63.250.102])
 by mx1.freebsd.org (Postfix) with ESMTP id 7E23A8D1
 for <arch@freebsd.org>; Fri, 15 Feb 2013 12:32:13 +0000 (UTC)
Received: from ds4.des.no (smtp.des.no [194.63.250.102])
 by smtp-int.des.no (Postfix) with ESMTP id 4B18C6229;
 Fri, 15 Feb 2013 12:32:12 +0000 (UTC)
Received: by ds4.des.no (Postfix, from userid 1001)
 id 0B621A535; Fri, 15 Feb 2013 13:32:11 +0100 (CET)
From: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= <des@des.no>
To: Konstantin Belousov <kostikbel@gmail.com>
Subject: Re: Unmapped I/O
References: <20121219135451.GU71906@kib.kiev.ua>
 <20130214194731.GK2522@kib.kiev.ua>
Date: Fri, 15 Feb 2013 13:32:11 +0100
In-Reply-To: <20130214194731.GK2522@kib.kiev.ua> (Konstantin Belousov's
 message of "Thu, 14 Feb 2013 21:47:31 +0200")
Message-ID: <86621trc50.fsf@ds4.des.no>
User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.2 (berkeley-unix)
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable
Cc: arch@freebsd.org
X-BeenThere: freebsd-arch@freebsd.org
X-Mailman-Version: 2.1.14
Precedence: list
List-Id: Discussion related to FreeBSD architecture <freebsd-arch.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-arch>,
 <mailto:freebsd-arch-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-arch>
List-Post: <mailto:freebsd-arch@freebsd.org>
List-Help: <mailto:freebsd-arch-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-arch>,
 <mailto:freebsd-arch-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 15 Feb 2013 12:32:13 -0000

Konstantin Belousov <kostikbel@gmail.com> writes:
> I consider the current patch ready to be committed into the HEAD.
> Some elements of the design were discussed with Jeff Roberson.  The
> patch was tested by Peter Holm, a backport to stable/9 got load
> testing by Scott Long.  I see an ~30% reduction in the system time on
> reading large files over UFS/ahci on the 4-core HTT machine.

That sounds very nice indeed.  Have you observed a similar reduction in
buildworld times?

DES
--=20
Dag-Erling Sm=C3=B8rgrav - des@des.no