Re: RFC: NAPI packet weighting patch

[Ben Greear <greearb@xxxxxxxxxxxxxxx>]

David S. Miller wrote:
> From: Ben Greear <greearb@xxxxxxxxxxxxxxx>
> > Maybe the poll is disabling the IRQs on the NIC for too long, or something
> > like that?
>
> In a reply I just sent out to this thread, I postulate that the
> jiffies check is hitting earlier with a lower weight value, a quick
> look at /proc/net/softnet_stat during their testing will confirm or
> deny this theory.
That would basically just decrease the work done in the NAPI poll though,
so I don't see how that could be the problem, since the 'solution' was to
force less work to be done.

> It could also just be a simple bug in the dev->quota accounting
> somewhere.
>
> Note that, in all of this, I do not have any objections to providing
> a way to configure the dev->weight values.  I will be applying Stephen
> Hemminger's patches.
Good.  The more knobs the merrier, so long as they are at least somewhat
documented and default to good sane values :)

Ben

--
Ben Greear <greearb@xxxxxxxxxxxxxxx>
Candela Technologies Inc  http://www.candelatech.com