On Fri, Apr 26, 2024 at 8:06 PM Jeremy Spewock <jspew...@iol.unh.edu> wrote: > > On Wed, Apr 10, 2024 at 9:19 AM Juraj Linkeš <juraj.lin...@pantheon.tech> > wrote: > > > > On Wed, Apr 10, 2024 at 12:53 PM Luca Vizzarro <luca.vizza...@arm.com> > > wrote: > > > > > > On 09/04/2024 20:12, Juraj Linkeš wrote: > > > >> @@ -104,16 +108,15 @@ def pmd_scatter(self, mbsize: int) -> None: > > > >> """ > > > >> testpmd = self.sut_node.create_interactive_shell( > > > >> TestPmdShell, > > > >> - app_parameters=StrParams( > > > >> - "--mbcache=200 " > > > >> - f"--mbuf-size={mbsize} " > > > >> - "--max-pkt-len=9000 " > > > >> - "--port-topology=paired " > > > >> - "--tx-offloads=0x00008000" > > > >> + app_parameters=TestPmdParameters( > > > >> + forward_mode=TestPmdForwardingModes.mac, > > > >> + mbcache=200, > > > >> + mbuf_size=[mbsize], > > > >> + max_pkt_len=9000, > > > >> + tx_offloads=0x00008000, > > > >> ), > > > >> privileged=True, > > > >> ) > > > >> - testpmd.set_forward_mode(TestPmdForwardingModes.mac) > > > > > > > > Jeremy, does this change the test? Instead of configuring the fw mode > > > > after starting testpmd, we're starting testpmd with fw mode > > > > configured. > > To my knowledge, as Luca mentions below, this does not functionally > change anything about the test, scatter should just need the MAC > forwarding mode to be set at some point before forwarding starts, it > doesn't technically matter when. One thing to note that this does > change, however, is that we lose the verification step that the method > within testpmd provides. I'm not sure off the top of my head if > testpmd just completely fails to start if the forwarding mode flag is > set and it fails to change modes or if it still starts and then just > goes back to default (io) which would make the test operate in an > invalid state without anyway of knowing. > > As another note however, I've never seen a mode change fail and I > don't know what could even make it fail, so this would be a rare thing > anyway, but still just something to consider. >
Ok, thanks. This is fine then. If we see a problem with this when testpmd starts we can just raise a bug against testpmd (as it should either start with mac forwarding or error). > > > > > > > I am not Jeremy (please Jeremy still reply), but we discussed this on > > > Slack. Reading through the testpmd source code, setting arguments like > > > forward-mode in the command line, is the exact equivalent of calling > > > `set forward mode` right after start-up. So it is equivalent in theory. > > > > > > > If not, we should remove the testpmd.set_forward_mode method, as it's > > > > not used anymore. > > > > > > Could there be test cases that change the forward mode multiple times in > > > the same shell, though? As this could still be needed to cover this. > > > > Yes, but we don't have such a test now. It's good practice to remove > > unused code. We can still bring it back anytime, it'll be in git > > history.