Benzi wrote:
> Hi,
> 
> I see this stat being increased meaning the tx ring is getting full
> and i want to avoid that. it might be that the cleanup of tx ring
> buffer is slow. In e1000 there is TxIntDelay that you recomment to
> lower its value for faster tx cleanup. IS there something similar for
> ixgbe? 
> 
> Thanks,
> Benzi

are you using flow control?

if not, the only other thing to adjust is to decrease the tx descriptor ring 
size (ethtool -G ... tx 256) (you'd be surprised how much speed up you can get 
with small packets by decreasing)

and

adjust the interrupt throttle rate with either the ethtool -C ... rx-usecs 
and/or the InterruptThrottleRate module load parameter.
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