[dpdk-dev] one worker reading multiple ports

De Lara Guarch, Pablo pablo.de.lara.guarch at intel.com
Thu Nov 20 09:56:58 CET 2014

Hi Newman,

> -----Original Message-----
> From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Newman Poborsky
> Sent: Thursday, November 20, 2014 8:34 AM
> To: dev at dpdk.org
> Subject: [dpdk-dev] one worker reading multiple ports
> Hi,
> is it possible to use one worker thread (one lcore) to read packets from
> multiple ports?
> When I start 2 workers and assign each one  to read from different ports
> (with  rte_eth_rx_burst()) everything works fine, but if I assign one
> worker to read packets from 2 ports, rte_eth_rx_burst() returns 0 as if no
> packets are read.

Yes, it is totally possible. The only problem would be if you try to use multiple threads 
to read/write on one port, in which case you should use multiple queues.
Look at l3fwd app for instance. You can use just a single core to handle packets on multiple ports.

> Is there any reason for this kind of behaviour?
> Thanks!
> Br,
> Newman P.

More information about the dev mailing list