Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261331AbUJZQpf (ORCPT ); Tue, 26 Oct 2004 12:45:35 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261333AbUJZQpe (ORCPT ); Tue, 26 Oct 2004 12:45:34 -0400 Received: from zeus.kernel.org ([204.152.189.113]:25048 "EHLO zeus.kernel.org") by vger.kernel.org with ESMTP id S261331AbUJZQpT (ORCPT ); Tue, 26 Oct 2004 12:45:19 -0400 From: Jesse Barnes To: Robin Holt Subject: Re: Hugepages demand paging V2 [0/8]: Discussion and overview Date: Tue, 26 Oct 2004 09:44:21 -0700 User-Agent: KMail/1.7 Cc: Jesse Barnes , William Lee Irwin III , Christoph Lameter , "Chen, Kenneth W" , linux-kernel@vger.kernel.org References: <200410251940.30574.jbarnes@sgi.com> <20041026143513.GC28391@lnx-holt.americas.sgi.com> In-Reply-To: <20041026143513.GC28391@lnx-holt.americas.sgi.com> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200410260944.22003.jbarnes@engr.sgi.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1263 Lines: 26 On Tuesday, October 26, 2004 7:35 am, Robin Holt wrote: > Sorry for being a stickler here, but the BTE is really part of the > I/O Interface portion of the shub. That portion has a seperate clock > frequency from the memory controller (unfortunately slower). The BTE > can zero at a slightly slower speed than the processor. It does, as > you pointed out, not trash the CPU cache. I guess I was getting ahead of myself :). I knew that it was part of the II but didn't know it had a slower clock frequency than the MD. > One other feature of the BTE is it can operate asynchronously from > the cpu. This could be used to, during a clock interrupt, schedule > additional huge page zero filling on multiple nodes at the same time. > This could result in a huge speed boost on machines that have multiple > memory only nodes. That has not been tested thoroughly. We have done > considerable testing of the page zero functionality as well as the > error handling. Might be worth some additional testing... Jesse - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/