Slow/broken USB and Ethernet on Snowballs/Origen boards?

Sachin Kamat sachin.kamat at linaro.org
Fri Mar 16 04:14:26 UTC 2012


Hi,

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>
> wrote:
>> Hi,
>>
>> 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
> problem
> 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
> have
> not made it into the trees yet.

These patches have been added to Samsung LT tree [1].

[1] git://git.linaro.org/landing-teams/working/samsung/kernel.git
(branch: tracking)


Search the mailing lists for s5p usb burst
> to find them.
>
> --
> Mans Rullgard / mru
>
> _______________________________________________
> linaro-dev mailing list
> linaro-dev at lists.linaro.org
> http://lists.linaro.org/mailman/listinfo/linaro-dev
>


-- 
With warm regards,
Sachin



More information about the linaro-dev mailing list