From owner-freebsd-current@FreeBSD.ORG Fri Feb 3 22:51:15 2006 Return-Path: X-Original-To: freebsd-current@freebsd.org Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 96E3016A420 for ; Fri, 3 Feb 2006 22:51:15 +0000 (GMT) (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 5339E43D46 for ; Fri, 3 Feb 2006 22:51:15 +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 304121A3C1F; Fri, 3 Feb 2006 14:51:15 -0800 (PST) Received: by obsecurity.dyndns.org (Postfix, from userid 1000) id 75B5454B5F; Fri, 3 Feb 2006 17:51:14 -0500 (EST) Date: Fri, 3 Feb 2006 17:51:14 -0500 From: Kris Kennaway To: Andrew Gallatin Message-ID: <20060203225114.GA9845@xor.obsecurity.org> References: <17379.56708.421007.613310@grasshopper.cs.duke.edu> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="WIyZ46R2i8wDzkSu" Content-Disposition: inline In-Reply-To: <17379.56708.421007.613310@grasshopper.cs.duke.edu> User-Agent: Mutt/1.4.2.1i Cc: freebsd-current@freebsd.org Subject: Re: machdep.cpu_idle_hlt and SMP perf? 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: Fri, 03 Feb 2006 22:51:15 -0000 --WIyZ46R2i8wDzkSu Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, Feb 03, 2006 at 05:47:32PM -0500, Andrew Gallatin wrote: >=20 > Why dooes machdep.cpu_idle_hlt=3D1 drop my 10GbE network rx > performance by a considerable amount (7.5Gbs -> 5.5Gbs)? I don't know, but I've set this to 0 on my machines because I also noticed a significant performance drop on general workloads with it set to 1. Kris --WIyZ46R2i8wDzkSu Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (FreeBSD) iD8DBQFD495iWry0BWjoQKURAnuYAKDuYnmj/z5HBk5WoTrI39GjyKOdNQCeMk8X pURIPg/GUVQOdHc3wtetsYo= =YSkR -----END PGP SIGNATURE----- --WIyZ46R2i8wDzkSu--