From owner-freebsd-stable@FreeBSD.ORG Wed Apr 12 21:59:10 2006 Return-Path: X-Original-To: freebsd-stable@freebsd.org Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 5DC0816A40F for ; Wed, 12 Apr 2006 21:59:10 +0000 (UTC) (envelope-from kris@obsecurity.org) Received: from elvis.mu.org (elvis.mu.org [192.203.228.196]) by mx1.FreeBSD.org (Postfix) with ESMTP id 5C3C643D46 for ; Wed, 12 Apr 2006 21:59:09 +0000 (GMT) (envelope-from kris@obsecurity.org) Received: from obsecurity.dyndns.org (elvis.mu.org [192.203.228.196]) by elvis.mu.org (Postfix) with ESMTP id 41AD11A4D88; Wed, 12 Apr 2006 14:59:09 -0700 (PDT) Received: by obsecurity.dyndns.org (Postfix, from userid 1000) id 7970451406; Wed, 12 Apr 2006 17:59:08 -0400 (EDT) Date: Wed, 12 Apr 2006 17:59:08 -0400 From: Kris Kennaway To: "David E. Cross" Message-ID: <20060412215908.GA31582@xor.obsecurity.org> References: <1144795412.81364.18.camel@localhost> <20060412040326.GA94545@xor.obsecurity.org> <443D3C94.7040404@samsco.org> <1144878900.52816.3.camel@localhost> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="J2SCkAp4GZ/dPZZf" Content-Disposition: inline In-Reply-To: <1144878900.52816.3.camel@localhost> User-Agent: Mutt/1.4.2.1i Cc: freebsd-stable@freebsd.org, Garance A Drosihn , Kris Kennaway Subject: Re: swap performance under 6.1 X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 12 Apr 2006 21:59:10 -0000 --J2SCkAp4GZ/dPZZf Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Apr 12, 2006 at 09:55:00PM +0000, David E. Cross wrote: > Yes, I wouldn't be at all surprised to find out that my 6.1 partition > has a bad block in .. say.. libc that's delaying reads and causing me > trouble, I just remember installing 6.1 and thinking "OUCH". >=20 > I get the impression that this is a latency issue more then a bandwidth > issue (responsiveness vs performance). so I think that any long running > test to see how effecitvely we swap isn't going to show anything. >=20 > I could totally re-partition and get 4.x, 5.x and 6.x all on > concurrently if that would help. But I think I would need a good test > program to have waiting in the wings to quantitatively measure the > differences; anyone have any ideas? The stress2 suite (www.holm.cc/stress) has a utility that is designed to stress this, you could check relative performance (after making sure it's deterministic). Kris --J2SCkAp4GZ/dPZZf Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2.2 (FreeBSD) iD8DBQFEPXgrWry0BWjoQKURAnIxAKDwKMworDirUYCgvbFIksZFOkfycQCfRDfY UcbKm6aQ4WTg5HNQEsrqbgM= =B7Zy -----END PGP SIGNATURE----- --J2SCkAp4GZ/dPZZf--