On 03/16/2012 05:20 PM, Mans Rullgard wrote:
On 16 March 2012 04:14, Sachin Kamat sachin.kamat@linaro.org wrote:
Hi,
On 15/03/2012, Mans Rullgard mans.rullgard@linaro.org wrote:
On 14 March 2012 20:04, Jannis Pohlmann jannis.pohlmann@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.
- 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)
That branch still needs one more patch (attached).
Thanks Mans for the patch. I have applied it to our tree. [1]
I would be nice if you can test this kernel once.
[1] git://git.linaro.org/landing-teams/working/samsung/kernel.git (tracking)
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