[Beowulf] tg3 driver and rx dropped packets

Bogdan Costescu bcostescu at gmail.com
Fri Dec 18 09:00:34 EST 2009

On Fri, Dec 18, 2009 at 2:40 PM, Michael Di Domenico
<mdidomenico4 at gmail.com> wrote:
> For some reason which i cannot determine, when we read a large amount
> of data into the workstation we see the RX dropped counter steadily
> (rapidly) increase, eventually locking the TCP transmissions, which
> results in an aborted file operation.

Try turning off rx-checksumming and/or TSO. You can find it you have
it enabled with:

ethtool -k eth0

and turn it on/off with:

ethtool -K eth0 tso off

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