Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261157AbVCaMMt (ORCPT ); Thu, 31 Mar 2005 07:12:49 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261382AbVCaMMt (ORCPT ); Thu, 31 Mar 2005 07:12:49 -0500 Received: from general.keba.co.at ([193.154.24.243]:42429 "EHLO helga.keba.co.at") by vger.kernel.org with ESMTP id S261157AbVCaMMq convert rfc822-to-8bit (ORCPT ); Thu, 31 Mar 2005 07:12:46 -0500 X-MimeOLE: Produced By Microsoft Exchange V6.5.7226.0 Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 8BIT Subject: RE: 2.6.11, USB: High latency? Date: Thu, 31 Mar 2005 14:12:38 +0200 Message-ID: X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: 2.6.11, USB: High latency? Thread-Index: AcU1fBU2T0AYox1PRwqOXOwJeq//cAAbiKAA From: "kus Kusche Klaus" To: "David Brownell" , Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1921 Lines: 46 > I couldn't find that previous email in the MARC archives. > > Regardless, you'd have to provide a small bit of information about > your hardware configuration. What device speed: full or high? > What controller: EHCI, OHCI, UHCI, something else? Which driver > for the stick: usb-storage, or ub? What else was using memory > and PCI bandwidth at the time? SMP? The error occurred on an intel Pentium 3 (500 MHz) embedded system with 440BX chipset and 192 MB RAM. USB is handled by the 440BX (intel 82371 PIIX4). The UHCI driver shares interrupt 7 with an intel 82559ER 100 Mbit ethernet controller (which is driven by the e100 driver and active: As there is no local keyboard, I access the system by ssh). The system "disk" is a 128 MB CF card directly connected to the 440BX primary IDE port and running in PIO mode 2 at about 2 MB/sec peak (but it is idle most of the time). There is a SM712 VGA chip running in text mode, a 1000 HZ std PC timer, and no other "interesting" device (nothing else on the PCI bus or causing any interrupts). The error was reproduced with statically linked (no modules) vanilla-2.6.11, 2.6.11-gentoo-r3, and realtime-preempt-2.6.12-rc1-V0.7.41-11 kernels, all built with gcc 3.4.3. No SMP. USB-storage for the sticks. I tried with two different sticks (an old 64 MB USB 1.x and a 1 GB USB 2.x), both show the same problem on all USB interfaces on the target. The same dd command works fine on both sticks on my office PC. -- Klaus Kusche Entwicklung Software - Steuerung Software Development - Control KEBA AG A-4041 Linz Gewerbepark Urfahr Tel +43 / 732 / 7090-3120 Fax +43 / 732 / 7090-8919 E-Mail: kus@keba.com www.keba.com - 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/