[PATCH] app/testpmd: txonly multiflow port change support

[Stephen Hemminger]

On Tue, 11 Apr 2023 13:11:07 -0700
Joshua Washington <joshwash at google.com> wrote:

> Google cloud routes traffic using IP addesses without the support of MAC
> addresses, so changing source IP address for txonly-multi-flow can have
> negative performance implications for net/gve when using testpmd. This
> change adds a new flag --txonly-alter-port, which allows the alteration
> of source port instead of source IP address for txonly multiflow mode.
> 
> The new flag can be tested with the following command:
> dpdk-testpmd -- --forward-mode=txonly --txonly-multi-flow --txonly-alter-port --txip=<SRC>,<DST>
> 
> Signed-off-by: Joshua Washington <joshwash at google.com>
> Reviewed-by: Rushil Gupta <rushilg at google.com>
> ---

Since the purpose of the tuple variation is to get RSS,
why not just make the udp port only mode the default.

Testpmd doesn't need more options :-)