[ofa-general] Re: [PATCH 2/3][NET_BATCH] net core use batching

[David Miller]

From: jamal <hadi at cyberus.ca>
Date: Wed, 10 Oct 2007 09:08:48 -0400

> On Wed, 2007-10-10 at 03:44 -0700, David Miller wrote:
> 
> > I've always gotten very poor results when increasing the TX queue a
> > lot, for example with NIU the point of diminishing returns seems to
> > be in the range of 256-512 TX descriptor entries and this was with
> > 1.6Ghz cpus.
> 
> Is it interupt per packet? From my experience, you may find interesting
> results varying tx interupt mitigation parameters in addition to the
> ring parameters.
> Unfortunately when you do that, optimal parameters also depends on
> packet size. so what may work for 64B, wont work well for 1400B.

No, it was not interrupt per-packet, I was telling the chip to
interrupt me every 1/4 of the ring.