Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S264340AbUADACH (ORCPT ); Sat, 3 Jan 2004 19:02:07 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264356AbUADACH (ORCPT ); Sat, 3 Jan 2004 19:02:07 -0500 Received: from sun1000.pwr.wroc.pl ([156.17.1.33]:62849 "EHLO sun1000.pwr.wroc.pl") by vger.kernel.org with ESMTP id S264340AbUADACF (ORCPT ); Sat, 3 Jan 2004 19:02:05 -0500 Date: Sun, 4 Jan 2004 01:02:01 +0100 From: Pawel Dziekonski To: szonyi calin Cc: linux-kernel@vger.kernel.org Subject: Re: IDE performance drop between 2.4.23 and 2.6.0 - pinpointed! Message-ID: <20040104000200.GA2594@sun1000.pwr.wroc.pl> Reply-To: Pawel Dziekonski References: <20040103220159.GA22096@sun1000.pwr.wroc.pl> <20040103224636.5738.qmail@web40602.mail.yahoo.com> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-2 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20040103224636.5738.qmail@web40602.mail.yahoo.com> X-Useless-Header: Vim powered ;^) X-00-Privacy-Policy: OpenPGP or S/MIME encrypted e-mail is welcome. X-01-Privacy-Policy-GPG-Key: http://blackhole.pca.dfn.de:11371/pks/lookup?search=dzieko@pwr.wroc.pl&op=get X-02-Privacy-Policy-GPG-Key_ID: 5AA7253D X-03-Privacy-Policy-GPG-Key_fingerprint: A80B 5022 185B 1BB5 8848 74C4 A7E1 423C 5AA7 253D X-04-Privacy-Policy-Personal_SSL_Certificate: http://www.europki.pl/cgi-bin/dn-cert.pl?serial=000001D2&certdir=/usr/local/cafe/data/polish_ca/certs/user&type=email X-05-Privacy-Policy-CA_SSL_Certificate: http://www.europki.pl/polish_ca/ca_cert/en_index.html User-Agent: Mutt/1.5.5.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1315 Lines: 33 On sob, 03 sty 2004 at 11:46:36 +0100, szonyi calin wrote: > --- Pawel Dziekonski a ?crit : > > hi, > > > > same problem here however it seems that i have pinpointed it > > )at least > > for me): > > > from the manpage of hdparm: -t Perform timings of device reads for > benchmark and compari- son purposes. For meaningful results, > this operation should be repeated 2-3 times on an otherwise inactive > sys- tem (no other active processes) with at least a couple of > megabytes of free memory. > if the above conditions are not met your test is irrelevant those conditions were met. trust me - i have just copied and pasted some of the results :^) ps. btw, for last 5 years 2.6.0 this is a 1st example of a situation where hdparm gives me so unstable results. i think this is because of the nature of as-scheduler. maybe i'm wrong. -- Pawel Dziekonski , KDM WCSS avatar:0:0: Wroclaw Networking & Supercomputing Center, HPC Department -> See message headers for privacy policy info. - 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/