Slow/broken USB and Ethernet on Snowballs/Origen boards?
sachin.kamat at linaro.org
Fri Mar 16 04:14:26 UTC 2012
On 15/03/2012, Mans Rullgard <mans.rullgard at linaro.org> wrote:
> On 14 March 2012 20:04, Jannis Pohlmann <jannis.pohlmann at codethink.co.uk>
>> I am currently playing with a couple of the development boards for which
>> there are Linaro hwpacks and LEBs. Since what I am trying to do requires
>> a lot of disk and network I/O, I've been paying special attention to the
>> data transfer rates I can get out of these boards.
>> Below is a brief summary of my findings.
>> 3) Origen
>> * the internal USB hub runs at Full Speed (12 MBit/s), resulting in a
>> maximum USB disk I/O of 1.5 MByte/s
>> * since the board does not feature Ethernet itself, I tried to attach
>> a USB Ethernet controller to it, but of course the transfer rate
>> through that is by the I/O upper limit of the USB hub
>> * I did not test wireless but it is not feasible for what I am trying
>> to do anyway
> Which kernel version are you using on the Origen? I noticed the same
> a while back, but it appears to have been fixed in the Samsung landing team
> tree. There is still another bug present in the Origen kernel preventing
> USB-ethernet working with EHCI. Some patches have been posted, but they
> not made it into the trees yet.
These patches have been added to Samsung LT tree .
Search the mailing lists for s5p usb burst
> to find them.
> Mans Rullgard / mru
> linaro-dev mailing list
> linaro-dev at lists.linaro.org
With warm regards,
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