Date: Wed, 3 May 2006 14:50:05 -0400 From: Kris Kennaway <kris@obsecurity.org> To: Vinny Abello <vinny@tellurian.com> Cc: freebsd-stable@freebsd.org Subject: Re: Hyperthreading in 6.x ... still frowned upon? Message-ID: <20060503185005.GA31387@xor.obsecurity.org> In-Reply-To: <7.0.1.0.2.20060503132315.09da2cf8@tellurian.com> References: <20060503113955.U1147@ganymede.hub.org> <4458CE13.6060804@mac.com> <7.0.1.0.2.20060503132315.09da2cf8@tellurian.com>
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--jRHKVT23PllUwdXP Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, May 03, 2006 at 01:36:04PM -0400, Vinny Abello wrote: > An Intel technical rep that gave a presentation on upcoming Intel VT=20 > technology in processors (Virtualization Technology) that I attended=20 > indicated that Hyperthreading was really designed to start getting=20 > programmers to program threading into their applications in=20 > preparation of dual core processors that we now have. That sounds like an interesting interpretation of history :-) > I typically disable Hyperthreading on all my servers as they are dual=20 > processor or dual core/dual processor or better anyway. I tend to get=20 > better results (with my applications) without Hyperthreading. I've=20 > been experimenting with leaving it on with my workstation as it's not=20 > a dual core or dual processor. In my experience it's almost always a net loss too. One should measure for oneself though. Kris --jRHKVT23PllUwdXP Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.3 (FreeBSD) iD8DBQFEWPtdWry0BWjoQKURAt7jAJ4pZIeCIeUvMUHxI5BDulTOAnAcJQCfZXPF 8bEfR4BSuKbdDPcELnYvcdI= =N7Cp -----END PGP SIGNATURE----- --jRHKVT23PllUwdXP--
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