Something i've noticed:
ixgbe:
Adaptive RX: off  TX: off
rx-usecs: 1
tx-usecs: 0

i40e:
Adaptive RX: on  TX: on
rx-usecs: 62
tx-usecs: 122

Stefan

Am 05.08.2015 um 09:02 schrieb Stefan Priebe - Profihost AG:
> Hello list,
>
> we're using the intel X520 cards with the ixgbe driver since a long time
> for our cloud infrastructure. We never had a problem with dropped
> packets and everything was always fine.
>
> Since a year we started switching to the X710 cards as they're better
> regarding their specs (lower power consumption, lower latency, better
> price).
>
> We've around 100 X710 cards running now and we had a lot of trouble with
> them. Back in 2014 there were a firmware bug, then there were driver
> problems with bonding and so on.
>
> Now we have detected a new problem! We're seeing a lot of rx_dropped
> packets on all X710 cards while all ixgbe based cards are working fine.
>
> I've tested the 1.2.48 driver als also the latest 1.3.4-k driver from
> 4.2-rc5.
>
> Can anybody help?
>
> Greets,
> Stefan
>

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