Date: Wed, 12 Apr 2006 17:59:08 -0400 From: Kris Kennaway <kris@obsecurity.org> To: "David E. Cross" <crossd@cs.rpi.edu> Cc: freebsd-stable@freebsd.org, Garance A Drosihn <drosih@rpi.edu>, Kris Kennaway <kris@obsecurity.org> Subject: Re: swap performance under 6.1 Message-ID: <20060412215908.GA31582@xor.obsecurity.org> In-Reply-To: <1144878900.52816.3.camel@localhost> References: <1144795412.81364.18.camel@localhost> <20060412040326.GA94545@xor.obsecurity.org> <p06230917c062e80c92b7@[128.113.24.47]> <443D3C94.7040404@samsco.org> <p06230919c062f93698b3@[128.113.24.47]> <1144878900.52816.3.camel@localhost>
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--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--
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