Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754727AbYCTLer (ORCPT ); Thu, 20 Mar 2008 07:34:47 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752497AbYCTLeh (ORCPT ); Thu, 20 Mar 2008 07:34:37 -0400 Received: from smtpq2.groni1.gr.home.nl ([213.51.130.201]:51279 "EHLO smtpq2.groni1.gr.home.nl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752494AbYCTLeg (ORCPT ); Thu, 20 Mar 2008 07:34:36 -0400 Message-ID: <47E24C0F.1070901@keyaccess.nl> Date: Thu, 20 Mar 2008 12:35:43 +0100 From: Rene Herman User-Agent: Thunderbird 2.0.0.12 (X11/20080213) MIME-Version: 1.0 To: Alessandro Suardi CC: "Lev A. Melnikovsky" , David Brownell , Linux Kernel Subject: Re: ehci-hcd affects hda speed References: <200803171700.26274.david-b@pacbell.net> <47DF19AD.405@keyaccess.nl> <200803171855.44552.david-b@pacbell.net> <47E1B062.4060709@keyaccess.nl> <5a4c581d0803192208w6db8f2aaj42eac883de126585@mail.gmail.com> In-Reply-To: <5a4c581d0803192208w6db8f2aaj42eac883de126585@mail.gmail.com> Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Score: -1.0 (-) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1652 Lines: 37 On 20-03-08 06:08, Alessandro Suardi wrote: > On Thu, Mar 20, 2008 at 1:31 AM, Rene Herman wrote: >> I do wonder -- is your hda throughput also the same before _ever_ attaching >> anything to the EHCI controller and after? In my case, the slow down only >> happened after switching on my external USB drive once, and would persist >> from that time until reboot (or unloading ehci-hcd, which I kept modular for >> exactly that reason). >> >> The sleep time wasn't the core problem, so I wonder of later VIA chips do >> still have the active async schedule problem... >> >> Alessandro? You said there still was a difference for you between no EHCI at >> all and EHCI after tweaking 4B as Lev showed. How much? > > When used setpci to tweak the setting, my hdparm -t went > from 17 to 25MB/s on /dev/hda. > > With your patch applied, now after booting it says 33MB/s for > hda and 37MB/s on hdb (and I can burn DVDs at a stable 6x > now, while growisofs backed off to 4x in less than a minute > before the patch). > > If the patch does exactly what setpci did, then perhaps I had > other activity on hda at the moment I ran the test... Yes, should be the exact same. It could be what I noted -- that you have the 33/37 just after booting, and a drop to 25 again after having switched on/used a EHCI device for the first time? That would be interesting. Rene. -- 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/