> -----Original Message----- > From: Thomas Monjalon [mailto:tho...@monjalon.net] > Sent: Monday, June 19, 2017 10:13 PM > To: De Lara Guarch, Pablo > Cc: dev@dpdk.org; Wu, Jingjing > Subject: Re: [dpdk-dev] [PATCH v3] app/testpmd: add parameter to start > forwarding TX first > > 15/06/2017 14:05, De Lara Guarch, Pablo: > > > Add parameter to start forwarding sending first > > > a burst of packets, which is useful when testing > > > a loopback connection. > > > > > > This was already implemented as an internal command, > > > but adding it as a parameter is interesting, as it > > > allows the user to test a loopback connection without > > > entering in the internal command line. > > > > > > Signed-off-by: Pablo de Lara <pablo.de.lara.gua...@intel.com> > > > --- > > > --- a/doc/guides/testpmd_app_ug/run_app.rst > > > +++ b/doc/guides/testpmd_app_ug/run_app.rst > > > @@ -188,6 +188,14 @@ The commandline options are: > > > > > > Start forwarding on initialization. > > > > > > +* ``--tx-first`` > > > + > > > + Start forwarding, after sending a burst of packets first. > > > + > > > +.. Note:: > > > + > > > + This flag should be only used in non-interactive mode. > > I don't really understand the benefit of this option. > Why is it better than > echo start tx_first | testpmd -i > ?
This is a good way to test a loopback connection without having to get into interactive mode. With the other patch that I sent, to show port statistics periodically (http://dpdk.org/dev/patchwork/patch/25344/), the app can show how traffic is forwarded having a simple loopback connection, without anything else required by the user. Thanks, Pablo
