From owner-freebsd-stable Thu Sep 27 7: 1: 6 2001 Delivered-To: freebsd-stable@freebsd.org Received: from shiva.jussieu.fr (shiva.jussieu.fr [134.157.0.129]) by hub.freebsd.org (Postfix) with ESMTP id 75ED237B442 for ; Thu, 27 Sep 2001 07:01:02 -0700 (PDT) Received: from parthe.lpthe.jussieu.fr (parthe.lpthe.jussieu.fr [134.157.10.1]) by shiva.jussieu.fr (8.11.3/jtpda-5.3.3) with ESMTP id f8RE0xP51582 for ; Thu, 27 Sep 2001 16:00:59 +0200 (CEST) Received: from niobe.lpthe.jussieu.fr (zp9tig@niobe.lpthe.jussieu.fr [134.157.10.41]) by parthe.lpthe.jussieu.fr (8.11.1/jtpda-5.3.1) with ESMTP id f8RE0vS07821 for ; Thu, 27 Sep 2001 16:00:59 +0200 (MEST) Received: (from uucp@localhost) by niobe.lpthe.jussieu.fr (8.11.3/8.11.3) with UUCP id f8RE0vJ77173 for freebsd-stable@freebsd.org; Thu, 27 Sep 2001 16:00:57 +0200 (CEST) (envelope-from michel@rose.lpthe.jussieu.fr) Received: (from michel@localhost) by rose.lpthe.jussieu.fr (8.11.3/8.11.3) id f8RE0q316068 for freebsd-stable@freebsd.org; Thu, 27 Sep 2001 16:00:52 +0200 (CEST) (envelope-from michel) Date: Thu, 27 Sep 2001 16:00:52 +0200 From: Michel Talon To: freebsd-stable@freebsd.org Subject: FreeBSD 4.4 and P4/i850 RAMBUS Systems Message-ID: <20010927160052.A16050@lpthe.jussieu.fr> Mail-Followup-To: freebsd-stable@freebsd.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 1.0pre2i Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG We have just received a PIV machine with rambus memory. Good news is that rambus is now rather cheap. More good news, this machine runs very fast on the computations we do. These are spin systems computations which do a lot of random access to memory (and not many computations for each access). The result is that the PIV 1.8Ghz runs twice as fast as an AMD Athlon 1.2 Ghz with the same memory size as soon as the size of the computation is large in memory (for small size the Athlon does better). These tests have been done in Linux. At least they show that rambus is a great bonus in this game. -- Michel Talon To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message