From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sun, 23 Jun 2002 03:37:32 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sun, 23 Jun 2002 03:37:32 -0400 Received: from holomorphy.com ([66.224.33.161]:7624 "EHLO holomorphy") by vger.kernel.org with ESMTP id ; Sun, 23 Jun 2002 03:37:31 -0400 Date: Sun, 23 Jun 2002 00:36:44 -0700 From: William Lee Irwin III To: Dave Hansen Cc: "Christopher E. Brown" , Andreas Dilger , "Griffiths, Richard A" , "'Andrew Morton'" , mgross@unix-os.sc.intel.com, "'Jens Axboe'" , Linux Kernel Mailing List , lse-tech@lists.sourceforge.net Subject: Re: [Lse-tech] Re: ext3 performance bottleneck as the number of spindles gets large Message-ID: <20020623073644.GK25360@holomorphy.com> Mail-Followup-To: William Lee Irwin III , Dave Hansen , "Christopher E. Brown" , Andreas Dilger , "Griffiths, Richard A" , 'Andrew Morton' , mgross@unix-os.sc.intel.com, 'Jens Axboe' , Linux Kernel Mailing List , lse-tech@lists.sourceforge.net References: <20020623043310.GL22411@clusterfs.com> <20020623063543.GH25360@holomorphy.com> <3D1578D3.20909@us.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <3D1578D3.20909@us.ibm.com> User-Agent: Mutt/1.3.25i Organization: The Domain of Holomorphy Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org >> On Sun, Jun 23, 2002 at 12:00:01AM -0600, Christopher E. Brown wrote: >>> However, multiple busses are *rare* on x86. There are alot of chained >>> busses via PCI to PCI bridge, but few systems with 2 or more PCI >>> busses of any type with parallel access to the CPU. William Lee Irwin III wrote: >> NUMA-Q has them. On Sun, Jun 23, 2002 at 12:29:23AM -0700, Dave Hansen wrote: > Yep, 2 independent busses per quad. That's a _lot_ of busses when you > have an 8 or 16 quad system. (I wonder who has one of those... ;) > Almost all of the server-type boxes that we play with have multiple > PCI busses. Even my old dual-PPro has 2. I thought I saw 3 PCI and 1 ISA per-quad., but maybe that's the "independent" bit coming into play. Cheers, Bill