Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265921AbUFIUO2 (ORCPT ); Wed, 9 Jun 2004 16:14:28 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265928AbUFIUO2 (ORCPT ); Wed, 9 Jun 2004 16:14:28 -0400 Received: from prgy-npn1.prodigy.com ([207.115.54.37]:26506 "EHLO oddball.prodigy.com") by vger.kernel.org with ESMTP id S265921AbUFIUO1 (ORCPT ); Wed, 9 Jun 2004 16:14:27 -0400 Message-ID: <40C76FC8.8030303@tmr.com> Date: Wed, 09 Jun 2004 16:15:04 -0400 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: Phy Prabab CC: linux-kernel@vger.kernel.org Subject: Re: slow down in 2.6 vs 2.4 References: <20040609033513.76754.qmail@web51807.mail.yahoo.com> In-Reply-To: <20040609033513.76754.qmail@web51807.mail.yahoo.com> 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 Content-Length: 883 Lines: 23 Phy Prabab wrote: > Hello! > > Over the last two days I have been struggling with > understanding why 2.6.x kernel is slower than > 2.4.21/23 kernels. I think I have a test case which > demostrates this issue. Unfortunately this is common. There are a bunch or tunables like swappiness and readahead you can adjust, but if anyone has a handle on why it's really so slow they don't seem to have gotten a patch out. On features 2.6 wins, on performance 2.4 seems faster in many cases. -- -bill davidsen (davidsen@tmr.com) "The secret to procrastination is to put things off until the last possible moment - but no longer" -me - 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/