From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261151AbUCCVdS (ORCPT ); Wed, 3 Mar 2004 16:33:18 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261154AbUCCVdS (ORCPT ); Wed, 3 Mar 2004 16:33:18 -0500 Received: from prgy-npn1.prodigy.com ([207.115.54.37]:16266 "EHLO oddball.prodigy.com") by vger.kernel.org with ESMTP id S261151AbUCCVdR (ORCPT ); Wed, 3 Mar 2004 16:33:17 -0500 Message-ID: <40465042.2080405@tmr.com> Date: Wed, 03 Mar 2004 16:38:10 -0500 From: Bill Davidsen User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6b) Gecko/20031208 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Andi Kleen CC: Linux Kernel Mailing List Subject: Re: [RFC][PATCH] O(1) Entitlement Based Scheduler References: <1vuMd-5jx-5@gated-at.bofh.it> <1vuMd-5jx-7@gated-at.bofh.it> <1vuMd-5jx-9@gated-at.bofh.it> <1vuMd-5jx-11@gated-at.bofh.it> <1vuMd-5jx-3@gated-at.bofh.it> <1vvyx-6jy-13@gated-at.bofh.it> <1vBE2-48V-21@gated-at.bofh.it> In-Reply-To: <1vBE2-48V-21@gated-at.bofh.it> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Andi Kleen wrote: > No doubt that there are different settings that make sense > for different workloads. But there is no reason one has to recompile > to set them - it's much nicer to just run a script at boot time to set > them, instead of recompiling/rebooting. This will also make benchmarking > much easier, because you can just write a script that sets the > various parameters, runs workloads, sets other parameters, runs > workload again etc. Requiring a recompile and reboot makes this > much harder. Andi, if people are trying to find an optimal tuning then in many cases a reboot is out. There are two reasons for this: - a production server, can't just reboot! - it's sometimes hard to recreate the load which is causing problems, and far easier to get a working config by diddling and watching. At least those are the reasons why I would feel able to tune the machines which most need it.