Flow control is disabled.
Can you explain please why *decreasing* (and not increasing) the tx ring
buffer will help avoiding tx_restart_queue?
Regarding InterruptThrottleRate, do you mean that setting it to higher value
may also prevent tx_restart_queue by faster tx ring cleanup?
On Mon, Apr 20, 2009 at 9:54 PM, Brandeburg, Jesse <
jesse.brandeb...@intel.com> wrote:
> 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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