Date: Mon, 3 Nov 2008 18:58:18 +1100 From: Peter Jeremy <peterjeremy@optushome.com.au> To: Ivan Voras <ivoras@freebsd.org> Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org, Giorgos Keramidas <keramida@freebsd.org> Subject: Re: svn commit: r184471 - in head/bin: cat cp Message-ID: <20081103075818.GK99398@server.vk2pj.dyndns.org> In-Reply-To: <9bbcef730811021534gb114db9x16a2d6c9a3ecee8b@mail.gmail.com> References: <200810301405.m9UE5wwZ053250@svn.freebsd.org> <877i7pdzva.fsf@kobe.laptop> <9bbcef730811021534gb114db9x16a2d6c9a3ecee8b@mail.gmail.com>
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--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 <ivoras@freebsd.org> wrote: >2008/10/31 Giorgos Keramidas <keramida@freebsd.org>: >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--
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