How to use --vdev Options for ./dpdk-l3fwd?

[Stephen Hemminger]

On Mon, 10 Apr 2023 18:47:59 -0400
Dinesh Kumar <raidinesh at utexas.edu> wrote:

> Hi There,
> I am new to the DPDK example and having issue with using  --vdev options
> for DPDK example and it is throwing the below error.
> 
> ./dpdk-l3fwd --log-level *:debug -c f -n 4 -- -p 0x3 --vdev
> 'net_pcap0,rx_pcap=input.pcap,tx_pcap=output.pcap'
> 
> -----------------------
> iavf_check_api_version(): Peer is supported PF host
> iavf_read_msg_from_pf(): Can't read msg from AQ
> iavf_read_msg_from_pf(): AQ from pf carries opcode 3, retval 0
> iavf_dev_alarm_handler(): ICR01_ADMINQ is reported
> iavf_handle_pf_event_msg(): VIRTCHNL_EVENT_LINK_CHANGE event
> iavf_handle_virtchnl_msg(): adminq response is received, opcode = 26
> EAL: lib.telemetry log level changed from disabled to debug
> TELEMETRY: Attempting socket bind to path
> '/var/run/dpdk/rte/dpdk_telemetry.v2'
> TELEMETRY: Socket creation and binding ok
> TELEMETRY: Telemetry initialized ok
> TELEMETRY: No legacy callbacks, legacy socket not created
> *./dpdk-l3fwd: unrecognized option '--vdev'*
> ./dpdk-l3fwd [EAL options] -- -p PORTMASK [-P] [--lookup] --config
> (port,queue,lcore)[,(port,queue,lcore)] [--rx-queue-size NPKTS]
> [--tx-queue-size NPKTS] [--eth-dest=X,MM:MM:MM:MM:MM:MM] [--max-pkt-len
> PKTLEN] [--no-numa] [--hash-entry-num] [--ipv6] [--parse-ptype]
> [--per-port-pool] [--mode] [--eventq-sched] [--event-vector
> [--event-vector-size SIZE] [--event-vector-tmo NS]] [-E] [-L]
> 
> please let me know if I am missing some options that need to be added with
> --vdev


DPDK options are split into the options for the DPDK infrastructure (EAL) and those
used by the applications. They are separated by the -- option.

In your example, the vdev option belongs to the DPDK infrastructure not the application.
Put it it before the -- and it should work