igb(4) Raising IGB_MAX_TXD ??

[Jack Vogel]

OH, well that's interesting to know, thanks John.

Jack


On Thu, Apr 19, 2012 at 5:22 AM, John Baldwin <jhb at freebsd.org> wrote:

> On Wednesday, April 18, 2012 7:40:17 pm Sean Bruno wrote:
> >
> > On Wed, 2012-04-18 at 09:49 -0700, Sean Bruno wrote:
> > > ok, good.  that at least confirms that I correctly translated between
> > > the driver code and documented specification.
> > >
> > > I will try 8k as a test for now and see how that runs.
> > >
> > > sean
> >
> > For now, I've patched one front end server with:
> > /usr/src/sys/dev/e1000/if_igb.h:#define IGB_MAX_RXD             4096 * 4
> >
> > And adjusted hw.igb.rxd: 8192
> >
> > So far so good, been running in production for a couple of hours so the
> > "smoke test" for this setting seems to be happy.
> >
> > We'll continue to adjust and test tomorrow during higher load
> > conditions.
>
> FWIW, at my current employer we run with both rxd and txd cranked up to 32k
> (we had to patch the driver as you suggested) and have not had any problems
> doing that for a couple of years now.
>
> --
> John Baldwin
>