From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265339AbUGAOXP (ORCPT ); Thu, 1 Jul 2004 10:23:15 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265342AbUGAOXP (ORCPT ); Thu, 1 Jul 2004 10:23:15 -0400 Received: from postfix4-2.free.fr ([213.228.0.176]:50095 "EHLO postfix4-2.free.fr") by vger.kernel.org with ESMTP id S265339AbUGAOXO (ORCPT ); Thu, 1 Jul 2004 10:23:14 -0400 From: Duncan Sands To: "Stephen J. Gowdy" Subject: Re: [Linux-usb-users] linux 2.6.6, bttv and usb2 data corruption & lockups & poor performance Date: Thu, 1 Jul 2004 16:23:09 +0200 User-Agent: KMail/1.6.2 Cc: linux-usb-users@lists.sourceforge.net, janne , linux-kernel@vger.kernel.org References: <200407010904.39925.baldrick@free.fr> In-Reply-To: MIME-Version: 1.0 Content-Disposition: inline Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <200407011623.09559.baldrick@free.fr> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thursday 01 July 2004 16:06, Stephen J. Gowdy wrote: > On Thu, 1 Jul 2004, Duncan Sands wrote: > > > > First of all, usb2 throughput was disappointing, i only got about > > > 5-15MB/s (usually about 8MB/s) while the manufacturer claims sustained > > > datarate of 35MB/s. > > > > Are you sure you plugged your device into a usb 2 port, and not a usb > > 1.1 port? Also, some products claim to be usb 2 devices, when they are > > in fact only usb 1.1. > > 1.1 devices would only get less than 1MB/s. Ah, I misread it as 8 M bits / s, which is max 1.1 speed. Bye, Duncan.