Re: [RFC] napi: limit GRO latency

Eric Dumazet
2012-10-08T19:46:38Z

On Mon, 2012-10-08 at 12:40 -0700, Stephen Hemminger wrote:
> On Mon, 08 Oct 2012 21:30:12 +0200
> Eric Dumazet <eric.dumazet@gmail.com> wrote:
>
> > System is under stress, you dont want to increase load at this point,
> > but increase bandwidth.
> >
> > Really try this on a 40Gbe link and see how bad it is.
>
> Not everybody has 40Gbe hardware just lying around available for testing :-)

;)

In fact, the current strategy to flush napi_gro when napi completes
might be not good for moderate traffic (thats 99% of the linux machines
I believe). We could have a deferred flush instead...

I dont know what strategy is used by hardware. But surely hardware uses
timers.