Low Tx-Rx performance with 10Gb NICs

[Outback Dingo]

On Fri, May 24, 2013 at 11:41 AM, Igor Mozolevsky <igor at hybrid-lab.co.uk>wrote:

> On Friday, 24 May 2013, Axel Fischer wrote:
>
>
> Additionally I noticed the following TCP errors
> > with netstat -s ...:
> >
> > 1186 data packets (1717328 bytes) retransmitted
> > 6847875 window update packets
> > 2319 duplicate acks
> > 25831 out-of-order packets (37403288 bytes)
> > 3733 discarded due to memory problems (drops)
> > 1186 segment rexmits in SACK recovery episodes
> > 1717328 byte rexmits in SACK recovery episodes
> >
> >
> >
>
> Looks like your data is flooding your memory buffers, have a look through
> https://calomel.org/freebsd_network_tuning.html
>
>
Ive got an 10Gb ix card i cant get to do more then 1.2Gbs send on FreeBSD
9-stable
pretty frustrating hunting down the issue.




> --
> Igor M.
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