Re: DPDK and energy efficiency

[Etienne-Victor Depasquale <edepa () ieee org>]

> It consumes 100% only if you busy poll (which is the default approach).
Precisely.

It is, after all, Intel's response to the problem of general-purpose
scheduling of its processors - which prevents the processor from being
viable under high networking loads.

Cheers,

Etienne

On Mon, Feb 22, 2021 at 12:58 PM Pawel Malachowski <
pawmal-nanog () freebsd lublin pl> wrote:

> Dnia Mon, Feb 22, 2021 at 08:33:35AM -0300, Douglas Fischer napisał(a):
>
> > But IMHO, the questions do not cover the actual reality of DPDK.
> > That característic of "100% CPU" depends on several aspects, like:
> >  - How old are the hardware on DPDK.
> >  - What type of DPDK Instructions are made(Very Dynamic as Statefull
> CGNAT,
> > ou Static ACLs?)
> >  - Using or not the measurements of DPDK Input/Drop/Fowarding.
> >  - CPU Affinity done according to the demand of traffic
> >  - SR-IOV (sharing resources) on DPDK.
>
> It consumes 100% only if you busy poll (which is the default approach).
> One can switch between polling and interrupts (or monitor, if supported),
> or introduce halt instructions, in case of low/medium traffic volume.
>
>
> --
> Pawel Malachowski
> @pawmal80


-- 
Ing. Etienne-Victor Depasquale
Assistant Lecturer
Department of Communications & Computer Engineering
Faculty of Information & Communication Technology
University of Malta
Web. https://www.um.edu.mt/profile/etiennedepasquale