ixl 40G bad performance?

[Kevin Oberman]

On Mon, Oct 19, 2015 at 8:11 AM, Luigi Rizzo <rizzo at iet.unipi.it> wrote:

> On Monday, October 19, 2015, Eggert, Lars <lars at netapp.com> wrote:
>
> > Hi,
> >
> > On 2015-10-19, at 16:20, Luigi Rizzo <rizzo at iet.unipi.it <javascript:;>>
> > wrote:
> > >
> > > i would look at the following:
> > > - c states and clock speed - make sure you never go below C1,
> > >  and fix the clock speed to max.
> > >  Sure these parameters also affect the 10G card, but there
> > >  may be strange interaction that trigger the power saving
> > >  modes in different ways
> >
> > I already have powerd_flags="-a max -b max -n max" in rc.conf, which I
> > hope should be enough.
>
>
> I suspect it might not touch the c states, but better check. The safest is
> disable them in the bios.
>

To disable C-States:
sysctl dev.cpu.0.cx_lowest=C1
--
Kevin Oberman, Part time kid herder and retired Network Engineer