From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964816AbWDZSsk (ORCPT ); Wed, 26 Apr 2006 14:48:40 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S964811AbWDZSsk (ORCPT ); Wed, 26 Apr 2006 14:48:40 -0400 Received: from omx2-ext.sgi.com ([192.48.171.19]:12748 "EHLO omx2.sgi.com") by vger.kernel.org with ESMTP id S964816AbWDZSsj (ORCPT ); Wed, 26 Apr 2006 14:48:39 -0400 Date: Wed, 26 Apr 2006 11:48:33 -0700 (PDT) From: Christoph Lameter To: Andrew Morton cc: axboe@suse.de, linux-kernel@vger.kernel.org, npiggin@suse.de, linux-mm@kvack.org Subject: Re: Lockless page cache test results In-Reply-To: <20060426114737.239806a2.akpm@osdl.org> Message-ID: References: <20060426135310.GB5083@suse.de> <20060426095511.0cc7a3f9.akpm@osdl.org> <20060426174235.GC5002@suse.de> <20060426111054.2b4f1736.akpm@osdl.org> <20060426114737.239806a2.akpm@osdl.org> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 26 Apr 2006, Andrew Morton wrote: > > A real application scenario may be an application that has lots of threads > > that are streaming data through multiple different disk channels (that > > are able to transfer data simultanouesly. e.g. connected to different > > nodes in a NUMA system) into the same address space. > > > > Something like the above is fairly typical for multimedia filters > > processing large amounts of data. > > >From the same file? Reading sections of the same file on multiple processors. This is done in order to obtain higher read performance than possible with single threaded reading.