From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 13 Jun 2001 07:39:45 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 13 Jun 2001 07:39:34 -0400 Received: from u-115-20.karlsruhe.ipdial.viaginterkom.de ([62.180.20.115]:44023 "EHLO dea.waldorf-gmbh.de") by vger.kernel.org with ESMTP id ; Wed, 13 Jun 2001 07:39:20 -0400 Date: Wed, 13 Jun 2001 12:39:01 +0200 From: Ralf Baechle To: "Holzrichter, Bruce" Cc: "'Rik van Riel'" , Rob Landley , Alan Cox , Matt Nelson , linux-kernel@vger.kernel.org Subject: Re: Any limitations on bigmem usage? Message-ID: <20010613123901.A31221@bacchus.dhis.org> In-Reply-To: <3AB544CBBBE7BF428DA7DBEA1B85C79C9B6AE1@nocmail.ma.tmpw.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <3AB544CBBBE7BF428DA7DBEA1B85C79C9B6AE1@nocmail.ma.tmpw.net>; from bruce.holzrichter@monster.com on Tue, Jun 12, 2001 at 02:34:40PM -0400 X-Accept-Language: de,en,fr Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jun 12, 2001 at 02:34:40PM -0400, Holzrichter, Bruce wrote: > > Brilliant. You need what, a 6x larger cache just to break even with > > the amount of time you're running in-cache? > > This may be the wrong platform for this question, but after reading Rob > Landley's note on performance on Itanium and architecture concerns, I am > interested in Kernel hackers who have had to write code for Itanium's > comments on the same, if you are not bound by NDA's. Correct me if I am > wrong, but I thought I saw the announcement that Itanium is shipping. Have > you tested Itanium performance? We have an preproduction unit with quad > Itanium's. I have not had time to benchmark against other units, I am > interested in performance items. Feel free to drop me a line off list if > you can. A number of Specbench numbers of Itanium systems is now available. Itanium performs relativly bad for the integer numbers compared to the entire competition but is a true fp killer. As a developer I hate that compiling code for Itanium due to the extra complexity of optimization and code generation is way slower than for others CPUs. So all in all Itanium is a two edged sword. Ralf