[ewg] Re: [ofa-general] [PATCH] IB/ipoib: fix net queue lockup

[Roland Dreier]

 > I agree, but I want to have a larger buffer to absorb larger picks. For
 > example, after applying this patch I tested how many times the net queue
 > is stopped and woken up when running four streams of netperf, udp, small
 > packets. When using the default 64 tx queue size it happened 500 times.
 > When I used a 256 tx queue size it happened only 37 times. This makes me
 > think that we have larger picks that a larger queue size can help
 > handle. 

OK, that makes sense -- although did you see any performance difference?

 > Also looking for example on Broadcom bnx2 driver on my machine, it uses
 > a 1000 tx queue len.

Isn't that the software queue above the hardware?  (That's what
txqueuelen in ifconfig is reporting)