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. Search the mailing lists for s5p usb burst to find them.