On Fri, Nov 5, 2010 at 12:20 PM, Claudio Jeker <cjeker@diehard.n-r-g.com> wrote:
quoted text
> The second generation ix(4) (82599) produce a low latency interrupt when
> the RX DMA ring gets full. This interrupt is currently unmoderated. On
> overload mclgeti() shrinks the ring to very small sizes and ix(4) will
> answer that with a massive interrupt storm. Enabling interrupt moderation
> on the LLI is possible and we should enable it since we do not use the
> LLI for any other low latency reason.
>
> With this diff the throughput of my test system increased from under
> 200kpps to almost 500kpps when overloading the system with 1Mpps on the
> input side.
>
> Please test on 82598 and 82599.
> --
> :wq Claudio
>

i'm okay with the diff (: