DPDK and energy efficiency

Mon Feb 22 23:28:59 UTC 2021

"set system default dataplane cpu-affinity 3-7" is what I have set for my
use case. Technically its 5 cores out of 8 total, but 4 are polling cores
and 1 manages those 4. Then the control plane is 3 plus the leftover cycles
of the 1 manager core.

On Mon, Feb 22, 2021 at 2:04 PM Etienne Depasquale <edepa at ieee.org> wrote:

> Thanks Jared; that's very interesting.
>
>
>
> Earlier today, I had a private exchange of emails regarding the
> progressive development of architectures specific to the domain of
> high-speed networking functions. Your note reinforces the notion that this
> “hard” partitioning of cores is a key part of the DSA (domain-specific
> architecture) here.
>
>
>
> Sent from my Windows 10 device
>
>
>
> *From: *Jared Geiger <jared at compuwizz.net>
> *Sent: *Monday, 22 February 2021 20:53
> *To: *NANOG <nanog at nanog.org>
> *Subject: *Re: DPDK and energy efficiency
>
>
>
> DANOS lets you specify how many dataplane cores you use versus control
> plane cores. So if you put a 16 core host in to handle 2GB of traffic, you
> can adjust the dataplane worker cores as needed. Control plane cores don't
> stay at 100% utilization.
>
>
>
> I use that technique plus DANOS runs on VMware (not oversubscribed) which
> allows me to use the hardware for other VMs. NICS are attached to the VM
> via PCI Passthrough which helps eliminate the overhead to the VMware
> hypervisor itself.
>
>
>
> I have an 8 core VM with 4 cores set to dataplane and 4 to control plane.
> The 4 control plane cores are typically idle only processing BGP route
> updates, SNMP, logs, etc.
>
>
>
> ~Jared
>
>
>
> On Sun, Feb 21, 2021 at 11:30 PM Etienne-Victor Depasquale <edepa at ieee.org>
> wrote:
>
> Hello folks,
>
>
>
> I've just followed a thread regarding use of CGNAT and noted a suggestion
> (regarding DANOS) that includes use of DPDK.
>
>
>
> As I'm interested in the breadth of adoption of DPDK, and as I'm a
> researcher into energy and power efficiency, I'd love to hear your feedback
> on your use of power consumption control by DPDK.
>
>
>
> I've drawn up a bare-bones, 2-question survey at this link:
>
>
>
> https://www.surveymonkey.com/r/J886DPY.
>
>
>
> Responses have been set to anonymous.
>
>
>
> Cheers,
>
>
>
> Etienne
>
>
>
> --
>
> 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
>
>
>
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