DPDK and energy efficiency

Fri Mar 5 21:27:30 UTC 2021

That was an unfortunate typo on my part, I meant to write "isn't
excessively difficult..."

Some real world examples of specific models of CPU + motherboard + PCI-E
NIC combinations with wattage figures at idle load, average load and
maximal load would be useful for comparison purposes.

On Fri, Mar 5, 2021 at 8:09 AM Tom Hill <tom at ninjabadger.net> wrote:

> On 05/03/2021 00:26, Eric Kuhnke wrote:
> > A great deal of this discussion could be resolved by the use of a $20
> > in-line 120VAC watt meter [1] plugged into something as simple as a $500
> > 1U server with some of the DPDK-enabled network cards connected to its
> > PCI-E bus, running DANOS.
>
> I'm fairly sure Etienne-Victor's email made specific reference to
> wattage measurements in both [2] and [3]. It would be fair to assume
> that the authors of those (IEEE) papers understood that you could
> measure wattage at the wall socket, before embarking on a paper
> regarding power efficiency.
>
> > Characterizing the idle load, average usage load, and absolute maximum
> > wattage load of an x86-64 platform is excessively difficult or
> complicated.
>
> It really isn't, particularly when the high figure is 400% of the low
> figure. You don't need milliwatt precision to see that your CPU is
> wasting power while not actually forwarding any packets.
>
> --
> Tom
>
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