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

Sangwook Lee sangwook.lee at linaro.org
Fri Mar 16 11:19:06 UTC 2012


On 16 March 2012 04:14, Sachin Kamat <sachin.kamat at linaro.org> wrote:

> 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)
>
>
For http access,
http://git.linaro.org/gitweb?p=landing-teams/working/samsung/kernel.git;a=summary



> 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
>
> _______________________________________________
> linaro-dev mailing list
> linaro-dev at lists.linaro.org
> http://lists.linaro.org/mailman/listinfo/linaro-dev
>
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