[ofa-general] Re: [Bug 506] IPoIB IPv4 multicast throughput is poor

[Michael S. Tsirkin]

> Yes, get a stready stream of these on sender.
> 
> ib0: TX ring full, stopping kernel net queue

Aha. (As a note, it's always useful to set debug level when
you experience problems).

> Why am I getting low throughput of IP multicast vs IPoIB UD UDP unicast?

It's something in the hardware - it's not handing out
completions fast enough, . Try increasing send queue size
through IPoIB module parameter.


BTW, Roland, why aren't we using txqueuelen ifconfig/ethtool options here?

-- 
MST