"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 <[email protected]> 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 <[email protected]> > *Sent: *Monday, 22 February 2021 20:53 > *To: *NANOG <[email protected]> > *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 <[email protected]> > 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 > > >
