From mboxrd@z Thu Jan 1 00:00:00 1970 From: Helmut Toplitzer Subject: BUG?: VIA IDE transfer-rate problem Date: Fri, 13 Jan 2006 19:09:07 +0100 Message-ID: <200601131909.07981.pvrusb2@toplitzer.net> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-15" Content-Transfer-Encoding: 7bit Return-path: Received: from toplitzer.net ([83.151.30.110]:31445 "EHLO toplitzer.net") by vger.kernel.org with ESMTP id S1422779AbWAMSJL (ORCPT ); Fri, 13 Jan 2006 13:09:11 -0500 Received: from localhost (localhost [127.0.0.1]) by toplitzer.net (SX Mail) with ESMTP id 51102BC6C for ; Fri, 13 Jan 2006 19:08:44 +0100 (CET) Received: from [10.0.0.140] (pc057-adsl.adsl.uni-klu.ac.at [143.205.236.57]) (using TLSv1 with cipher RC4-MD5 (128/128 bits)) (No client certificate requested) by toplitzer.net (SX Mail) with ESMTP id EEBC1BC44 for ; Fri, 13 Jan 2006 19:08:43 +0100 (CET) Content-Disposition: inline Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: linux-ide@vger.kernel.org Hi! I've got a question about a small experiment I made: I tried to find out the transfer-rate of my hd by useing hdparm -t /dev/hda and got changing transferrates starting from 37MB/s with CPU not utilized 55MB/s with CPU 100% utilized 22MB/s with ehci-hcd loaded and a device already initilized 55MB/s with ehci-hcd loaded and CPU 100% utilized (see log1/log2) So is this supposed normal operation? Or is there something wrong with it? Even tried useing the lirc_dev and lirc_i2c kernel-modules from the lirc project (Infrared remote over usb) and got only 12MB/s on hda until using CPU with 100%. So it looks like CPU/USB/IDE is in some interaction. Any ideas what to do against this. My current kernel is 2.6.15 TIA Helmut -- My GNUpg fingerprint http://www.gnupg.org 4563 F4FB 0B7E 8698 53CD 00E9 E319 35BD 6A91 1656