On Fri, 27 Apr 2007, Rick Jones wrote:
> Bryan Lawver wrote:
> > I had so much debugging turned on that it was not the "slowing of the
> > traffic" but the "non-coelescencing" that was the remedy. The NIC is a
> > MyriCom NIC and these are easy options to set.
>
> As chance would have it, I've played with some Myricom myri10ge NICs
> recently,
> and even disabled large receive offload during some netperf tests :) It is a
> modprobe option. Going back now to the driver source and the README I see :-)
>
>
> <excerpt>
> Troubleshooting
> ===============
>
> Large Receive Offload (LRO) is enabled by default. This will
> interfere with forwarding TCP traffic. If you plan to forward TCP
> traffic (using the host with the Myri10GE NIC as a router or bridge),
> you must disable LRO. To disable LRO, load the myri10ge driver
> with myri10ge_lro set to 0:
>
> # modprobe myri10ge myri10ge_lro=0
>
> Alternatively, you can disable LRO at runtime by disabling
> receive checksum offloading via ethtool:
>
> # ethtool -K eth2 rx off
>
> </excerpt>
>
> rick jones
What version of the myri10ge driver is this? With the 1.2.0 version
that comes with the 2.6.20.7 kernel, there is no myri10ge_lro module
parameter.
[EMAIL PROTECTED] ~]# modinfo myri10ge | grep -i lro
[EMAIL PROTECTED] ~]#
And I've been testing IP forwarding using two Myricom 10-GigE NICs
without setting any special modprobe parameters.
-Bill
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