From owner-freebsd-sun4v@FreeBSD.ORG Mon Sep 8 19:55:01 2008 Return-Path: Delivered-To: freebsd-sun4v@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 8FD0F1065674; Mon, 8 Sep 2008 19:55:01 +0000 (UTC) (envelope-from peterjeremy@optushome.com.au) Received: from mail18.syd.optusnet.com.au (mail18.syd.optusnet.com.au [211.29.132.199]) by mx1.freebsd.org (Postfix) with ESMTP id 215AA8FC17; Mon, 8 Sep 2008 19:55:00 +0000 (UTC) (envelope-from peterjeremy@optushome.com.au) Received: from server.vk2pj.dyndns.org (c122-106-215-175.belrs3.nsw.optusnet.com.au [122.106.215.175]) by mail18.syd.optusnet.com.au (8.13.1/8.13.1) with ESMTP id m88JswBH022437 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Tue, 9 Sep 2008 05:54:59 +1000 X-Bogosity: Ham, spamicity=0.000000 Received: from server.vk2pj.dyndns.org (localhost.vk2pj.dyndns.org [127.0.0.1]) by server.vk2pj.dyndns.org (8.14.2/8.14.2) with ESMTP id m88JsvvH012991; Tue, 9 Sep 2008 05:54:57 +1000 (EST) (envelope-from peter@server.vk2pj.dyndns.org) Received: (from peter@localhost) by server.vk2pj.dyndns.org (8.14.2/8.14.2/Submit) id m88JsvNh012990; Tue, 9 Sep 2008 05:54:57 +1000 (EST) (envelope-from peter) Date: Tue, 9 Sep 2008 05:54:57 +1000 From: Peter Jeremy To: Darren Reed Message-ID: <20080908195457.GD15376@server.vk2pj.dyndns.org> References: <3c1674c90808211442t707966fq29997b53a70ed2f7@mail.gmail.com> <20080822113317.GD32539@server.vk2pj.dyndns.org> <48AEA699.10903@FreeBSD.org> <20080822201603.GA14444@alchemy.franken.de> <48C4DEEF.7070201@freebsd.org> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="5LiOUhUlsRX0HDkW" Content-Disposition: inline In-Reply-To: <48C4DEEF.7070201@freebsd.org> X-PGP-Key: http://members.optusnet.com.au/peterjeremy/pubkey.asc User-Agent: Mutt/1.5.18 (2008-05-17) Cc: freebsd-hackers@freebsd.org, Kip Macy , freebsd-sun4v@freebsd.org Subject: Re: the future of sun4v X-BeenThere: freebsd-sun4v@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Porting FreeBSD to the sun4v List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 08 Sep 2008 19:55:01 -0000 --5LiOUhUlsRX0HDkW Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable [cc list trimmed] On 2008-Sep-08 01:14:39 -0700, Darren Reed wrote: >The critical issue for freebsd (and any operating system for >that matter) on rock is how well does the kernel scale to a >system with that many concurrent threads? Right now it doesn't. And based on some previous threads, there is a lot of redesign to do before it can. But stability needs to come before scalability. There's no point in FreeBSD pretending it can support some arbitrary number of CPUs when it panics due to races in one of the CPU subsystems - which is my understanding of the current sun4v state. --=20 Peter Jeremy Please excuse any delays as the result of my ISP's inability to implement an MTA that is either RFC2821-compliant or matches their claimed behaviour. --5LiOUhUlsRX0HDkW Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.9 (FreeBSD) iEYEARECAAYFAkjFgxEACgkQ/opHv/APuIfMpACgvrMTawiIxmUTlZpHyobVSSCB MhYAoIoMncY72LEhXX3BCPuJmyxsP7lF =K28Y -----END PGP SIGNATURE----- --5LiOUhUlsRX0HDkW--