Chelsio T520-SO-CR low performance (netmap tested) for RX

[Navdeep Parhar]

On Sat, Jan 23, 2016 at 04:54:52PM -0200, Marcus Cenzatti wrote:
...
> here is the output for netstat when I pkt-gen -f tx un-throttled (14Mpps):
> 
>             input        (Total)           output
>    packets  errs idrops      bytes    packets  errs      bytes colls drops
>       900k     0     0        55M          3     0        550     0     0
>       900k     0     0        55M          3     0        422     0     0
>       900k     0     0        55M          3     0        422     0     0
>       900k     0     0        55M          3     0        422     0     0
>       900k     0     0        55M          9     0       2.4K     0     0
>       900k     0     0        55M          3     0        422     0     0
>       900k     0     0        55M          3     0        422     0     0
>       900k     0     0        55M          3     0        422     0     0
>       900k     0     0        55M          3     0        422     0     0
>       900k     0     0        55M          3     0        422     0     0

This means that the chip really is getting ~900K packets per second from
the wire.  If it was receiving 14.8M and delivering 900K you'd have seen
14.8M in packets and 13.9M (14.8 - 900K) in idrops.

Regards,
Navdeep