From: Rene Herman <rene.herman@keyaccess.nl>
To: David Brownell <david-b@pacbell.net>
Cc: Pavel Machek <pavel@ucw.cz>,
Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>,
Linux Kernel <linux-kernel@vger.kernel.org>,
Mark Lord <lkml@rtr.ca>,
David Brownell <dbrownell@users.sourceforge.net>
Subject: Re: External USB2 HDD affects speed hda
Date: Thu, 02 Jun 2005 00:33:30 +0200 [thread overview]
Message-ID: <429E37BA.7090502@keyaccess.nl> (raw)
In-Reply-To: <429E3338.9000401@keyaccess.nl>
Rene Herman wrote:
> David Brownell wrote:
>> The experiment: verify that only the RUN bit is set on your machine
>> too. If "Periodic" and/or "Async" bits are set, then the controller
>> is _supposed_ to be issuing DMA transfers over PCI, so less bandwidth
>> will be available. Otherwise, not.
[ snip ]
> and one after switching on the USB2 HDD, when the hdparm result for hda
> has dropped to 42 MB/s:
>
> ===
> bus pci, device 0000:00:09.2 (driver 10 Dec 2004)
> EHCI 1.00, hcd state 1
> structural params 0x00002204
> capability params 0x00006872
> status a008 Async Recl FLR
Only see that "Async" now while rereading. Did you mean that one? If so,
I'm right now catting the registers file and that "Async" is toggling on
and off continuously. 4 cats in a row:
status 0008 FLR
status 8008 Async FLR
status a008 Async Recl FLR
status 0008 FLR
Rene.
next prev parent reply other threads:[~2005-06-01 22:39 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-05-30 23:21 External USB2 HDD affects speed hda Rene Herman
2005-06-01 8:18 ` Pavel Machek
2005-06-01 18:25 ` Rene Herman
2005-06-01 19:40 ` David Brownell
2005-06-01 22:14 ` Rene Herman
2005-06-01 22:33 ` Rene Herman [this message]
2005-06-01 23:43 ` David Brownell
2005-06-02 1:23 ` Mikulas Patocka
2005-06-02 2:17 ` David Brownell
2005-06-02 13:19 ` Rene Herman
2005-08-05 22:34 ` Rene Herman
2005-09-17 2:36 ` David Brownell
2005-09-17 14:45 ` Rene Herman
2005-12-12 23:24 ` Rene Herman
2005-06-02 13:57 ` Lennart Sorensen
2005-06-02 13:11 ` Rene Herman
2005-06-02 20:37 ` Lennart Sorensen
2005-06-02 22:49 ` Grant Coady
2005-06-02 23:56 ` Rene Herman
2005-06-03 0:54 ` David Brownell
2005-06-01 11:48 ` Mark Lord
2005-06-01 18:30 ` Rene Herman
2005-06-01 19:15 ` Petr Vandrovec
2005-06-01 19:45 ` Rene Herman
2005-06-01 20:37 ` David Brownell
2005-06-01 22:24 ` Rene Herman
2005-06-01 23:40 ` David Brownell
-- strict thread matches above, loose matches on Subject: below --
2005-12-21 7:08 Helmut Toplitzer
2005-12-21 8:10 ` Rene Herman
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