From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1766890AbXEBR4K (ORCPT ); Wed, 2 May 2007 13:56:10 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1766991AbXEBR4K (ORCPT ); Wed, 2 May 2007 13:56:10 -0400 Received: from ebiederm.dsl.xmission.com ([166.70.28.69]:51530 "EHLO ebiederm.dsl.xmission.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1766890AbXEBR4J (ORCPT ); Wed, 2 May 2007 13:56:09 -0400 From: ebiederm@xmission.com (Eric W. Biederman) To: "Rajib Majumder" Cc: linux-kernel@vger.kernel.org Subject: Re: Kernel Scalability References: Date: Wed, 02 May 2007 11:55:58 -0600 In-Reply-To: (Rajib Majumder's message of "Wed, 2 May 2007 20:56:07 +0800") Message-ID: User-Agent: Gnus/5.110006 (No Gnus v0.6) Emacs/21.4 (gnu/linux) 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 "Rajib Majumder" writes: > Hi, > > I am wondering if 2.4.x/2.6.x kernel is scalable enough to run on > 8-CPU hardware. Do we have any scalability comparison data between > 2.4/2.6 kernels and beyond 4-CPU? > > If yes, is the scalablity is near linear? I haven't a clue what the data looks like but it is worth noting that Linux runs on the SGI Altix and the large Unisys machines, as well as large RISC machines. So 128+ cpus seems to work. It depends on your application and what it stresses but scalability isn't just a software issue. It is also a hardware issue, and the kernel can't scale linearly unless the hardware does as well. Eric