From owner-freebsd-performance@FreeBSD.ORG Thu Aug 3 16:15:29 2006 Return-Path: X-Original-To: freebsd-performance@freebsd.org Delivered-To: freebsd-performance@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id C852016A4DA; Thu, 3 Aug 2006 16:15:29 +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 9F3F043D45; Thu, 3 Aug 2006 16:15:29 +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 8627E1A3C23; Thu, 3 Aug 2006 09:15:29 -0700 (PDT) Received: by obsecurity.dyndns.org (Postfix, from userid 1000) id B04595125B; Thu, 3 Aug 2006 12:15:27 -0400 (EDT) Date: Thu, 3 Aug 2006 12:15:26 -0400 From: Kris Kennaway To: etalk etalk Message-ID: <20060803161525.GA42517@xor.obsecurity.org> References: Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="ZGiS0Q5IWpPtfppv" Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.2.2i Cc: freebsd-fs@freebsd.org, freebsd-performance@freebsd.org Subject: Re: about the performance comparsion of 6.1 vs 5.3 on amd64 X-BeenThere: freebsd-performance@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Performance/tuning List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 03 Aug 2006 16:15:29 -0000 --ZGiS0Q5IWpPtfppv Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, Jul 14, 2006 at 05:20:00PM +0800, etalk etalk wrote: > I did some test about io performance of bsd6.1 and bsd5.3 on amd64=20 > machine , and i didn't see any obvious performance's improvement . > Is there anybody know how about the performance improvement of bsd6.1= =20 > when comparing to bsd5.3 on amd64 machine, and is there any tools that ca= n=20 > let me see the improvement. The difference is that in 6.x it is no longer locked by Giant, meaning that concurrent operations can be performed concurrently instead of being explicitly serialized. This is particularly noticeable if there are other tasks also competing for the Giant lock, such as your disk driver. See http://www.bsdcan.org/2006/papers/FilesystemPerformance.pdf for more details. Kris --ZGiS0Q5IWpPtfppv Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (FreeBSD) iD8DBQFE0iEdWry0BWjoQKURApASAKD24kQK64bgMkjyvXhprrbYgDRSEACgrgLV 3cix/YCZraeYdBqcG6f8cgg= =vaDW -----END PGP SIGNATURE----- --ZGiS0Q5IWpPtfppv--