From owner-freebsd-current@FreeBSD.ORG Wed May 16 23:06:25 2012 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 431C4106564A for ; Wed, 16 May 2012 23:06:25 +0000 (UTC) (envelope-from peter@rulingia.com) Received: from mail28.syd.optusnet.com.au (mail28.syd.optusnet.com.au [211.29.133.169]) by mx1.freebsd.org (Postfix) with ESMTP id C8CE38FC0A for ; Wed, 16 May 2012 23:06:24 +0000 (UTC) Received: from server.rulingia.com (c220-239-254-65.belrs5.nsw.optusnet.com.au [220.239.254.65]) by mail28.syd.optusnet.com.au (8.13.1/8.13.1) with ESMTP id q4GN6Gnm012282 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=FAIL) for ; Thu, 17 May 2012 09:06:17 +1000 X-Bogosity: Ham, spamicity=0.000000 Received: from server.rulingia.com (localhost.rulingia.com [127.0.0.1]) by server.rulingia.com (8.14.5/8.14.5) with ESMTP id q4GN6FpQ024752 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Thu, 17 May 2012 09:06:15 +1000 (EST) (envelope-from peter@server.rulingia.com) Received: (from peter@localhost) by server.rulingia.com (8.14.5/8.14.5/Submit) id q4GN6FPC024751 for freebsd-current@freebsd.org; Thu, 17 May 2012 09:06:15 +1000 (EST) (envelope-from peter) Date: Thu, 17 May 2012 09:06:15 +1000 From: Peter Jeremy To: freebsd-current@freebsd.org Message-ID: <20120516230615.GC84284@server.rulingia.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="hQiwHBbRI9kgIhsi" Content-Disposition: inline X-PGP-Key: http://www.rulingia.com/keys/peter.pgp User-Agent: Mutt/1.5.21 (2010-09-15) Subject: "make delete-old" performance. X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 16 May 2012 23:06:25 -0000 --hQiwHBbRI9kgIhsi Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable I recently ran "make delete-old" on a -current box and felt it was rather slow. That prompted me to do some more careful experiments. On one box where I have both 8-stable and 9-stable available, there was a ~30x slowdown (based on 5 runs, ignoring the first). I don't have a -current world on that box so I can't directly compare but on another pair of fairly similar boxes, I get a ~180x slowdown between 8-stable and -current (and that figure is probably optimistic since the -current box was idle whereas the 8-stable box was fairly busy). I realise that "make delete-old" isn't something you nede to do every day but going from sub-second to multi-minute duration is quite noticable. Can anyone suggest what has caused the change? --=20 Peter Jeremy --hQiwHBbRI9kgIhsi Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.19 (FreeBSD) iEYEARECAAYFAk+0MucACgkQ/opHv/APuIeudgCfcizw5gqvdpbLmDYa/Dv3uhfV rnkAoIHZjs2Y8gB5q5iElLTBlqTjxAPE =ZttN -----END PGP SIGNATURE----- --hQiwHBbRI9kgIhsi--