On Thu, Jan 17, 2013 at 5:19 AM, David Aldrich David.Aldrich@emea.nec.comwrote:
Hi
I am using an Advantech TMX320TCI6614 EVM to develop code for an ARM core on a TI C66x device. The ARM core runs:
U-Boot 2011.06-00002-gc4611c1-dirty (May 30 2012 - 15:38:01)
I have booted this target card for several months from a tftp server running under Ubuntu 10.04, with no problems. But, this week, I have tried to move to a tftp server that runs on a different machine running Ubuntu 12.04 LTS.
Since moving to Ubuntu 12.04 the tftp download is very slow, although it does succeed eventually. I have tried getting the boot files using a tftp client running on another Ubuntu host and the download is fast.
Please can anyone suggest a reason for the slow download when using the EVM with the 12.04 server?
TFTP is a very simple protocol and proceeds in lock step - get a request, send a block, wait for an ack of the last block, send the next block, etc. If either side times out, it will retry, but it can take quite a while. I would suggest to do some logging on the tftp server side or run wireshark or tcpdump and look for retries.