From owner-svn-src-head@FreeBSD.ORG Mon Nov 3 17:56:02 2008 Return-Path: Delivered-To: svn-src-head@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 8CC301065670; Mon, 3 Nov 2008 17:56:02 +0000 (UTC) (envelope-from peterjeremy@optushome.com.au) Received: from fallbackmx08.syd.optusnet.com.au (fallbackmx08.syd.optusnet.com.au [211.29.132.10]) by mx1.freebsd.org (Postfix) with ESMTP id EFDEB8FC1A; Mon, 3 Nov 2008 17:56:01 +0000 (UTC) (envelope-from peterjeremy@optushome.com.au) Received: from mail36.syd.optusnet.com.au (mail36.syd.optusnet.com.au [211.29.133.76]) by fallbackmx08.syd.optusnet.com.au (8.13.1/8.13.1) with ESMTP id mA37wMZW005071; Mon, 3 Nov 2008 18:58:23 +1100 Received: from server.vk2pj.dyndns.org (c122-106-215-175.belrs3.nsw.optusnet.com.au [122.106.215.175]) by mail36.syd.optusnet.com.au (8.13.1/8.13.1) with ESMTP id mA37wJAK027844 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Mon, 3 Nov 2008 18:58:20 +1100 X-Bogosity: Ham, spamicity=0.000000 Received: from server.vk2pj.dyndns.org (localhost.vk2pj.dyndns.org [127.0.0.1]) by server.vk2pj.dyndns.org (8.14.3/8.14.3) with ESMTP id mA37wJ6k045884; Mon, 3 Nov 2008 18:58:19 +1100 (EST) (envelope-from peter@server.vk2pj.dyndns.org) Received: (from peter@localhost) by server.vk2pj.dyndns.org (8.14.3/8.14.3/Submit) id mA37wIxN045883; Mon, 3 Nov 2008 18:58:18 +1100 (EST) (envelope-from peter) Date: Mon, 3 Nov 2008 18:58:18 +1100 From: Peter Jeremy To: Ivan Voras Message-ID: <20081103075818.GK99398@server.vk2pj.dyndns.org> References: <200810301405.m9UE5wwZ053250@svn.freebsd.org> <877i7pdzva.fsf@kobe.laptop> <9bbcef730811021534gb114db9x16a2d6c9a3ecee8b@mail.gmail.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="IbVRjBtIbJdbeK1C" Content-Disposition: inline In-Reply-To: <9bbcef730811021534gb114db9x16a2d6c9a3ecee8b@mail.gmail.com> X-PGP-Key: http://members.optusnet.com.au/peterjeremy/pubkey.asc User-Agent: Mutt/1.5.18 (2008-05-17) Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org, Giorgos Keramidas Subject: Re: svn commit: r184471 - in head/bin: cat cp X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.5 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, 03 Nov 2008 17:56:02 -0000 --IbVRjBtIbJdbeK1C Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On 2008-Nov-03 00:34:47 +0100, Ivan Voras wrote: >2008/10/31 Giorgos Keramidas : >The difference between the best and the worst is 247 context switches >(total, not per second). > >> It looks like it's probably worth pushing the limit up to 8 MB when we >> have lots of memory :) > >Yes, it's an improvement, but who will ever notice? :) Note that you will eventually hit a limit and start getting worse performace: Once the buffer size exceeds the available free RAM then cp/cat will start eating into inactive pages or (worse) active pages for other processes. --=20 Peter Jeremy Please excuse any delays as the result of my ISP's inability to implement an MTA that is either RFC2821-compliant or matches their claimed behaviour. --IbVRjBtIbJdbeK1C Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.9 (FreeBSD) iEYEARECAAYFAkkOrxoACgkQ/opHv/APuIcfOACgqkzSGEqtxRmhjWiJnshyt7ba iyAAoL1tl7Qt9BheFlqWPQLCfNXl8s3X =kfWE -----END PGP SIGNATURE----- --IbVRjBtIbJdbeK1C--