Actually I found the problem with above I have to run as -- -i to get rid
of the no commandline core given and -- --port-topology=chained. However
now, I am wondering what does it mean to have a paired and chained
port-topology? Also even though the 82598 specs say its dual-ported, I only
get one port, so is it that each NIC card = one port or is there a way to
get two ports out of a NIC?


On Thu, Jun 20, 2013 at 12:44 PM, Peter Chen <peter.feifan.chen@gmail.com>wrote:

> Hi, I am trying to run testpmd app under dpdk. I have Ubuntu Server 12.04
> running on a Dell R510 with two quad Xeon 5506 and one Intel 82598EB 10G
> NIC. However when I run it, I get the following error:
>
>      No commandline core given, start packet forwarding
>
>      Warning! Cannot handle an odd number of ports with the current port
> topology. Configuration must be changed to have an even number of ports, or
> relaunch application with --port-topology=chained
>
>      io packet forwarding - CRC stripping disabled - packets/burst = 16
>      nb forwarding cores=1 - nb forwarding ports = 1
>      RX queues = 1 - RX desc = 128 - RX free threshold = 0
>      RX threshold registers: pthresh = 8 hthresh = 8 wthresh = 4
>      TX queues = 1 - TX desc = 512 - TX free threshold = 0
>      TX threshold registers: pthread=36 hthresh = 0 wthresh = 0
>      TX RS bit threshold = 0
>
>      Press enter to exit
>
> I am wondering how I can see the port topology and what this is exactly.
> Also how would I go about changing that as the --port-topology usage for
> running dpdk doesn't seem to exist when I try "sudo ./testpmd -c ff -n 4 -r
> 2 --port-topology= (something)". Thanks.
>
> Peter
>