Re: [Cerowrt-devel] Better results from CeroWrt 3.10.28-16

[Rich Brown <richb.hanover@gmail.com>]

Sebastian,

> 	Currently there is no default auto tuning, the user needs to put the word auto into the "target" fields in the queue discipline tab in SQM (which is only exposed after selecting "show advanced configuration" and "show dangerous configuration", not very user friendly, at least it does not say 'Beware of the Leopard'...). So I am sure Rich would have noted that. I think we need a bit of testing of the auto-tuning feature and then make auto the default for ingest and egress. But for the current users I did not want to change the default without some testing (my track record of breaking things slightly comes to mind ;) )

Once we get the calculation correct, I would vote for the default being "auto" (that is, the ingress and egress strings would be pre-configure to "auto"). It would be the right thing for virtually anyone, but people could change it in the name of research.

While I'm lobbying, I would still like to see the second item in the Link Layer choices be "Ethernet with overhead" (instead of simply "Ethernet') Doing this makes it easier to explain:

"None" means none. CeroWrt does not make any per-packet adjustments at all.

"Ethernet with overhead" means that CeroWrt assumes that each packet has an additional overhead of N bytes that needs to be taken into account.

"ATM: ..." means that CeroWrt accounts for the incredibly arcane (stupid?) vagaries of the ATM 48-in-53 byte framing.

Thanks.

Rich