Re: [Coin] Fwd: The Future of P4, Revisited

[[e-mail]]

If you see the slides I sent out, Octeon uses vpp and dpdk. You will have to ask Marvell about OpenWRT.

Hemant

-----Original Message-----
From: 'Toerless Eckert' <[e-mail]> 
Sent: Tuesday, May 16, 2023 11:11 AM
To: [e-mail]
Cc: 'Hesham ElBakoury' <[e-mail]>; 'Marie-Jose Montpetit' <[e-mail]>; 'coin' <[e-mail]>; [e-mail]
Subject: Re: [Coin] Fwd: The Future of P4, Revisited


Any Octeon device you can recommend that has OpenWRT running on it leveraging the Octeon acceleration capabilities ?

If not OpenWRT, then any other open source route infra ?

Cheers
    Toerless

On Mon, May 15, 2023 at 04:37:51PM -0400, [e-mail] wrote:
> Why do you need API if P4 is involved? This is one API for P4:
> 
> https://github.com/p4lang/p4c/blob/main/p4include/v1model.p4
> 
> Then, use library provided by Marvell to program Octeon hw accelerators and you are good to go.
> 
> Hemant
>  
> 
> -----Original Message-----
> From: 'Toerless Eckert' <[e-mail]>
> Sent: Monday, May 15, 2023 3:45 PM
> To: Hesham ElBakoury <[e-mail]>
> Cc: [e-mail]; 'Marie-Jose Montpetit' <[e-mail]>; 
> 'coin' <[e-mail]>; [e-mail]
> Subject: Re: [Coin] Fwd: The Future of P4, Revisited
> 
> No idea yet as to whether or not Marvel actually makes their API publically available, but Broadcom certainly does not. I looked long and found no researcher that had managed to get access to it. NPL is purely a proprietary solution offered to custsomers of broadcom, and seemingly the degree of information that customers get depends proportionally to the amount of business for broadcom.
> 
> Toerless
> 
> On Mon, May 15, 2023 at 12:28:04PM -0700, Hesham ElBakoury wrote:
> > How you compare Marvel Octeon 10 with Broadcom Trident and Jericho 2 
> > devices which use NPL (https://nplang.org).
> > 
> > Hesham
> > 
> > > Toerless,
> > > 
> > > This is the latest network processor which supports use in a switch or nic.
> > > 
> > > https://www.marvell.com/content/dam/marvell/en/company/media-kit/o
> > > ct eon-10/marvell-octeon-10-media-deck.pdf
> > > 
> > > This is your Tofino replacement with hardware available from Marvell and P4 compiler and tools chain available from my company.
> > > 
> > > Hemant
> > > 
> > > 
> > > -----Original Message-----
> > > From: Coin<[e-mail]>  On Behalf Of Toerless Eckert
> > > Sent: Monday, May 15, 2023 1:04 PM
> > > To: Marie-Jose Montpetit<[e-mail]>
> > > Cc: coin<[e-mail]>;[e-mail]
> > > Subject: Re: [Coin] Fwd: The Future of P4, Revisited
> > > 
> > > Thanks, Marie-Jose
> > > 
> > > IMHO:
> > > 
> > > - P4 in research short-term:
> > >    Researchers can not do real-world relevant PoC with just BMV2, because it has no constraints.
> > >    All those papers claiming some problem can be solved with P4 and then just use BMV2 are just
> > >    so painful to read/listen-to. We really need a BMV2 with the exact constraints of Tofino,
> > >    and given how Intel is deinvesting from Tofino, maybe they would finally be willing to
> > >    publish those constraints outside of NDA so this can be implemented into BMV2.
> > > 
> > > - SmartNICs:
> > >    P4 is not the right DSL for SmartNICs even if Intel may say so because they want to
> > >    sell SmartNICs and have a brand with P4. SmartNICs are much more flexible, and programming then
> > >    in P4 constraints you. If you don't know anything better, try eBPF. That is AFAIK the
> > >    most widely adopted DSL today to span general purpose CPU (host/router CPU), and SmartNICs.
> > > 
> > >    SmartNICs are a great target FPE for forwarding plane features you do not need on every hop,
> > >    but for example only on few "can be more expensive" hops. WAN interface of site-edge-routers
> > >    (Campus, Home, WAN) for example. But do not try to assume they would be used beyond that
> > >    (on every hop == especially on higher aggregation speed links!).
> > > 
> > > - P4/Coin for higher-than-forwarding-plane features:
> > >    With Tofino disappearing, i think we should caution researchers to NOT invest cycles trying to
> > >    implement solutions on P4 with the explicit purpose of "abusing" Tofino, aka: Program a
> > >    non-forwarding-plane problem solution in P4 in the expectation that a fast P4 exeuction
> > >    product like Tofino would be a great alternative/competition to other execution platforms
> > >    (SmartNIC, CPU,...). We had several of those great ideas presented/shown in Coin, they
> > >    where all about higher than forwarding-plane "compute" problems. But very quickly, with
> > >    Tofino aging, i am sure CPU or SmartNIC slutions for the same problems can easily be
> > >    shown to be more cost-effective.
> > > 
> > > - Long-term forwarding plane research:
> > >    The rejection of the industry (outside Intel) to support P4 for researchers on their router/switch
> > >    forwarding planes (for a decade now) should primarily be a trigger for research funding
> > >    such as from NSF/EU to better enable long-term forwarding plane research. IMHO there
> > >    should simply be a single well funded effort for a Network Programming Element (NPE) equivalent
> > >    to RISC-V. Aka: fully open source architecture and instruction set for a research NPE,
> > >    competitive to industry products. There are lot of other benefits from such an effort
> > >    that could help make that happen.
> > > 
> > > Cheers
> > >      Toerless
> > > 
> > > On Mon, May 15, 2023 at 03:33:42AM -0700, Marie-Jose Montpetit wrote:
> > > > Interesting article for out community.
> > > > 
> > > > mjm
> > > > 
> > > > Marie-José Montpetit, Ph.D.
> > > > [e-mail]
> > > > 
> > > > 
> > > > 
> > > > From: Larry Peterson from Systems Approach 
> > > > <[e-mail]>  <[e-mail]>
> > > > Reply: Larry Peterson from Systems Approach
> > > > <reply+1zsws7&rqag0&&3ca860fd966ac1a0bf575ed48379b6645b7df5edc09
> > > > 03
> > > > e4c5
> > > > [e-mail]>
> > > > <reply+1zsws7&rqag0&&3ca860fd966ac1a0bf575ed48379b6645b7df5edc09
> > > > 03
> > > > e4c5
> > > > [e-mail]>
> > > > Date: May 15, 2023 at 3:55:52 AM To:[e-mail]  
> > > > <[e-mail]> <[e-mail]>
> > > > Subject:  The Future of P4, Revisited
> > > > 
> > > > The P4 Workshop was a couple weeks ago, and as General Chair, I 
> > > > went into it with a fair amount of trepidation. My concern was 
> > > > that Intel’s announcement earlier this year that they’re 
> > > > cancelling development of the Tofino 3 switching chip would have 
> > > > a chilling effect, not only on the Workshop, but also on the 
> > > > future of P4. That concern has been voiced in several forums  ‌ 
> > > > ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ 
> > > > ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ 
> > > > ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ 
> > > > ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ 
> > > > ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ 
> > > > ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ 
> > > > ‌ ‌ ‌ ‌ ‌ ‌ ‌ Open in app
> > > > <https://open.substack.com/pub/systemsapproach/p/the-future-of-p
> > > > 4-
> > > > one- perspective?utm_source=email&redirect=app-store>
> > > > or online
> > > > <https://substack.com/redirect/2/eyJlIjoiaHR0cHM6Ly9zeXN0ZW1zYXB
> > > > wc
> > > > m9hY
> > > > 2guc3Vic3RhY2suY29tL3AvdGhlLWZ1dHVyZS1vZi1wNC1vbmUtcGVyc3BlY3Rpd
> > > > mU
> > > > _dG9
> > > > rZW49ZXlKMWMyVnlYMmxrSWpvME5qVTNOakl5TkN3aWNHOXpkRjlwWkNJNk1USXd
> > > > Oa
> > > > kF4T
> > > > lRreExDSnBZWFFpT2pFMk9EUXhNemN6TkRrc0ltVjRjQ0k2TVRZNE5qY3lPVE0wT
> > > > 1N
> > > > 3aWF
> > > > YTnpJam9pY0hWaUxUSTRNemswTXlJc0luTjFZaUk2SW5CdmMzUXRjbVZoWTNScGI
> > > > yN
> > > > GlmU
> > > > S50UVhzNmRNSG1GRWdMS0I0dlVHNHVHSlRVU0UwTjdVZEFIMXFzajg2bUNBIiwic
> > > > CI
> > > > 6MTI
> > > > wNjAxNTkxLCJzIjoyODM5NDMsImYiOnRydWUsInUiOjQ2NTc2MjI0LCJpYXQiOjE
> > > > 2O
> > > > DQxM
> > > > zczNDksImV4cCI6MTY4NjcyOTM0OSwiaXNzIjoicHViLTAiLCJzdWIiOiJsaW5rL
> > > > XJ lZGl yZWN0In0.6L7-AmSfpdLfVXnKIHzqDqYX9u_tCmRVPJC2N9oP8gU?>
> > > > The Future of P4, Revisited
> > > > <https://substack.com/app-link/post?publication_id=283943&post_i
> > > > d=
> > > > 1206
> > > > 01591&utm_source=post-email-title&isFreemail=true&token=eyJ1c2Vy
> > > > X2
> > > > lkIj
> > > > o0NjU3NjIyNCwicG9zdF9pZCI6MTIwNjAxNTkxLCJpYXQiOjE2ODQxMzczNDksIm
> > > > V4
> > > > cCI6
> > > > MTY4NjcyOTM0OSwiaXNzIjoicHViLTI4Mzk0MyIsInN1YiI6InBvc3QtcmVhY3Rp
> > > > b2 4ifQ .tQXs6dMHmFEgLKB4vUG4uGJTUSE0N7UdAH1qsj86mCA>
> > > > 
> > > > Larry Peterson
> > > > <https://substack.com/redirect/ff29b5a3-7ea9-4b83-b888-b0c517b2b
> > > > ed
> > > > d?j=
> > > > eyJ1IjoicnFhZzAifQ.CwdsLjQyIcRXfYRGUucLsXfrvggM3KKa9Z1jxtXNWH0>
> > > > May 15
> > > > <https://substack.com/redirect/ff29b5a3-7ea9-4b83-b888-b0c517b2b
> > > > ed
> > > > d?j=
> > > > eyJ1IjoicnFhZzAifQ.CwdsLjQyIcRXfYRGUucLsXfrvggM3KKa9Z1jxtXNWH0>
> > > > 
> > > > <https://substack.com/app-link/post?publication_id=283943&post_i
> > > > d=
> > > > 1206
> > > > 01591&utm_source=substack&isFreemail=true&submitLike=true&token=
> > > > ey
> > > > J1c2
> > > > VyX2lkIjo0NjU3NjIyNCwicG9zdF9pZCI6MTIwNjAxNTkxLCJyZWFjdGlvbiI6Iu
> > > > Kd
> > > > pCIs
> > > > ImlhdCI6MTY4NDEzNzM0OSwiZXhwIjoxNjg2NzI5MzQ5LCJpc3MiOiJwdWItMjgz
> > > > OT
> > > > QzIi
> > > > wic3ViIjoicmVhY3Rpb24ifQ.vN6AE7iLQvKkv98V0RaNKEWEX9UdKbdHQdc3nu9
> > > > 5K
> > > > yg&u
> > > > tm_medium=email>
> > > > <https://substack.com/app-link/post?publication_id=283943&post_i
> > > > d=
> > > > 1206
> > > > 01591&utm_source=substack&utm_medium=email&isFreemail=true&comme
> > > > nt
> > > > s=tr
> > > > ue&token=eyJ1c2VyX2lkIjo0NjU3NjIyNCwicG9zdF9pZCI6MTIwNjAxNTkxLCJ
> > > > pY
> > > > XQiO
> > > > jE2ODQxMzczNDksImV4cCI6MTY4NjcyOTM0OSwiaXNzIjoicHViLTI4Mzk0MyIsI
> > > > nN
> > > > 1YiI
> > > > 6InBvc3QtcmVhY3Rpb24ifQ.tQXs6dMHmFEgLKB4vUG4uGJTUSE0N7UdAH1qsj86
> > > > mC A&ut m_source=substack&utm_medium=email>
> > > > <https://substack.com/redirect/2/eyJlIjoiaHR0cHM6Ly9zeXN0ZW1zYXB
> > > > wc
> > > > m9hY
> > > > 2guc3Vic3RhY2suY29tL3AvdGhlLWZ1dHVyZS1vZi1wNC1vbmUtcGVyc3BlY3Rpd
> > > > mU
> > > > _dXR
> > > > tX3NvdXJjZT1zdWJzdGFjayZ1dG1fbWVkaXVtPWVtYWlsJmFjdGlvbj1yZXN0YWN
> > > > rL
> > > > WNvb
> > > > W1lbnQiLCJwIjoxMjA2MDE1OTEsInMiOjI4Mzk0MywiZiI6dHJ1ZSwidSI6NDY1N
> > > > zY
> > > > yMjQ
> > > > sImlhdCI6MTY4NDEzNzM0OSwiZXhwIjoxNjg2NzI5MzQ5LCJpc3MiOiJwdWItMCI
> > > > sI
> > > > nN1Y
> > > > iI6ImxpbmstcmVkaXJlY3QifQ.hfc7rMzN53dfpysbLYXxmtkw9siB9dPnC71KIavCOTo?
> > > > &utm_source=substack&utm_medium=email>
> > > > 
> > > > Share
> > > > <https://substack.com/app-link/post?publication_id=283943&post_i
> > > > d=
> > > > 1206
> > > > 01591&utm_source=substack&utm_medium=email&utm_content=share&act
> > > > io
> > > > n=sh
> > > > are&triggerShare=true&isFreemail=true&token=eyJ1c2VyX2lkIjo0NjU3
> > > > Nj
> > > > IyNC
> > > > wicG9zdF9pZCI6MTIwNjAxNTkxLCJpYXQiOjE2ODQxMzczNDksImV4cCI6MTY4Nj
> > > > cy
> > > > OTM0
> > > > OSwiaXNzIjoicHViLTI4Mzk0MyIsInN1YiI6InBvc3QtcmVhY3Rpb24ifQ.tQXs6
> > > > dM
> > > > HmFE
> > > > gLKB4vUG4uGJTUSE0N7UdAH1qsj86mCA>
> > > > 
> > > > 
> > > > The P4 workshop has now been chaired by both co-founders of 
> > > > Systems Approach, but this year the P4 landscape has shifted 
> > > > again with Intel’s announcement that Tofino 3, its flagship 
> > > > P4-powered switching chip, would not go ahead. There is much 
> > > > more to P4 than Tofino, however, as we explore in this week’s newsletter.
> > > > ------------------------------
> > > > 
> > > > The P4 Workshop
> > > > <https://substack.com/redirect/4b87822a-70c6-4ffa-864a-45637b269
> > > > 09
> > > > c?j=
> > > > eyJ1IjoicnFhZzAifQ.CwdsLjQyIcRXfYRGUucLsXfrvggM3KKa9Z1jxtXNWH0>
> > > > was a couple weeks ago, and as General Chair, I went into it 
> > > > with a fair amount of trepidation. My concern was that Intel’s 
> > > > announcement
> > > > <https://substack.com/redirect/a0831b60-fff8-4ded-88c7-f3e6ef7e1
> > > > e5
> > > > 4?j=
> > > > eyJ1IjoicnFhZzAifQ.CwdsLjQyIcRXfYRGUucLsXfrvggM3KKa9Z1jxtXNWH0>
> > > > earlier this year that they’re cancelling development of the 
> > > > Tofino 3 switching chip would have a chilling effect, not only 
> > > > on the Workshop, but also on the future of P4. That concern has 
> > > > been voiced in several forums, including SIGCOMM’s Slack 
> > > > workspace
> > > > <https://substack.com/redirect/300dcab9-6056-4c82-9627-1e08ea449
> > > > b0
> > > > e?j=
> > > > eyJ1IjoicnFhZzAifQ.CwdsLjQyIcRXfYRGUucLsXfrvggM3KKa9Z1jxtXNWH0>,
> > > > with members of the P4 Advisory Board 
> > > > <https://substack.com/redirect/2fcc130d-cf74-4d68-be4e-d531cbb37
> > > > 9b
> > > > 4?j=
> > > > eyJ1IjoicnFhZzAifQ.CwdsLjQyIcRXfYRGUucLsXfrvggM3KKa9Z1jxtXNWH0>
> > > > making reassuring pronouncements in various settings. (See for 
> > > > example, Nick McKeown’s post to the P4 Forum
> > > > <https://substack.com/redirect/b0f9bc57-686d-4962-8676-c234ebcbd
> > > > 12
> > > > f?j=
> > > > eyJ1IjoicnFhZzAifQ.CwdsLjQyIcRXfYRGUucLsXfrvggM3KKa9Z1jxtXNWH0>,
> > > > and Nick along with Nate Foster and Jennifer Rexford discussing 
> > > > the future of Network Programmability on The Networking Channel
> > > > <https://substack.com/redirect/f2016908-8afb-4538-be3d-5d0e6aab0
> > > > b3
> > > > c?j=
> > > > eyJ1IjoicnFhZzAifQ.CwdsLjQyIcRXfYRGUucLsXfrvggM3KKa9Z1jxtXNWH0>
> > > > ).
> > > > 
> > > > I won’t try to give a point-by-point replay of what Nick, Nate, 
> > > > and Jen and others have been saying, except to observe that at a 
> > > > high level it can be summarized as follows:
> > > > 
> > > > *Programmable Networks  >>  P4 Language  >>  Tofino Switching
> > > > Chip*
> > > > 
> > > > They point out, for example, that Tofino is just one of many 
> > > > interesting backend targets for P4 programs (SmartNICs
> > > > <https://substack.com/redirect/f5d04cdb-5915-42ab-9904-a20c38eea
> > > > b3
> > > > 3?j=
> > > > eyJ1IjoicnFhZzAifQ.CwdsLjQyIcRXfYRGUucLsXfrvggM3KKa9Z1jxtXNWH0>
> > > > and IPUs
> > > > <https://substack.com/redirect/a0ddc803-4ea3-4248-96a1-bdc33f86c
> > > > d1
> > > > 5?j=
> > > > eyJ1IjoicnFhZzAifQ.CwdsLjQyIcRXfYRGUucLsXfrvggM3KKa9Z1jxtXNWH0>
> > > > being the next “big deal”) and P4 is one of many tools being 
> > > > used to inject functionality into the end-to-end network path 
> > > > (DPDK and eBPF being two active projects that people are integrating with P4).
> > > > Ultimately, the value of programmability comes from having 
> > > > visibility and control over the network, and there are many complementary approaches to making that happen.
> > > > With that background, I do have three takeaways from what turned 
> > > > out to be an interesting and vibrant two days at the P4 Workshop 
> > > > (despite my initial concerns).
> > > > 
> > > > First, we’re often so focused on P4 as a tool to program the 
> > > > forwarding pipeline that we forget the other half of its value
> > > > proposition: It also provides a way to specify the behavior of a 
> > > > pipeline (independent of how that pipeline is implemented). We 
> > > > talk about this idea, and the value of being able to 
> > > > auto-generate the Control API, in the P4 chapter of our SDN Book 
> > > > <https://substack.com/redirect/4b87822a-70c6-4ffa-864a-45637b26909c?j=eyJ1IjoicnFhZzAifQ.CwdsLjQyIcRXfYRGUucLsXfrvggM3KKa9Z1jxtXNWH0>.
> > > > Rob Sherwood made a similar argument
> > > > <https://substack.com/redirect/2442a19b-b82c-410c-8692-f50b89733
> > > > 87
> > > > 5?j=
> > > > eyJ1IjoicnFhZzAifQ.CwdsLjQyIcRXfYRGUucLsXfrvggM3KKa9Z1jxtXNWH0>
> > > > at the P4 Workshop. It is now becoming a reality as companies 
> > > > like Google are starting to use such behavioral definitions as a 
> > > > Hardware Abstraction Layer (see Parveen Patel’s Keynote 
> > > > <https://substack.com/redirect/e656a164-3fef-497b-9628-ffeb70010
> > > > 8a
> > > > f?j=
> > > > eyJ1IjoicnFhZzAifQ.CwdsLjQyIcRXfYRGUucLsXfrvggM3KKa9Z1jxtXNWH0>
> > > > at the Workshop). This makes me hopeful that we are rapidly 
> > > > approaching the day when a P4 program (plus the generated P4RT
> > > > interface) will become the standard way network providers 
> > > > specify their requirements to network vendors, and proposed new 
> > > > features (whether proprietary or standard) will be specified by 
> > > > a P4 program (potentially augmenting the intuition and design rationale presented in an RFC).
> > > > 
> > > > *As an aside, I couldn’t help but notice the similarities 
> > > > between the architecture Parveen described and the way P4 has 
> > > > been used to program the forwarding plane of the 5G Mobile Core 
> > > > <https://substack.com/redirect/64e4cac9-e6fd-4652-8e36-09f50ff1305c?j=eyJ1IjoicnFhZzAifQ.CwdsLjQyIcRXfYRGUucLsXfrvggM3KKa9Z1jxtXNWH0>.
> > > > Both include a P4-based “abstract forwarding model” that’s 
> > > > independent of the underlying implementation details*.
> > > > 
> > > > Second, it is common to divide forwarding pipelines into “programmable”
> > > > versus “fixed function”, but this glosses over what might be the 
> > > > more important distinction: whether the pipeline is *open* or *closed*.
> > > > Even “fixed function” pipelines are increasingly flexible–it’s 
> > > > just a question of how restrictive the vendor is in who they 
> > > > allow to make changes. This restriction may have the biggest 
> > > > impact on researchers who want to experiment with a new feature 
> > > > (especially ones that do not yet have a proven market), but 
> > > > maybe less so in the commercial world where incentives to make 
> > > > changes are
> > > > (arguably) well-defined. Using P4 as the “spec language” (as I 
> > > > just outlined) has the potential to accelerate the process on 
> > > > the commercial side. On the research side, there is a strong 
> > > > argument in favor of using Tofino 2 to demonstrate the 
> > > > feasibility and value of new ideas (12.8 Tb/s still makes for a 
> > > > credible Proof-of-Concept), and repeating the refrain yet again, 
> > > > P4-as-spec makes for a compelling tech transfer story. If that 
> > > > were to happen, it would be interesting to see how vendors and 
> > > > chip designers adapt to reduce their spec-to-hardware implementation overhead. I would argue that programmable forwarding planes have a time-to-market advantage even for closed solutions.
> > > > 
> > > > Third, our focus on quantifiable metrics makes it easy to forget 
> > > > about the less quantifiable aspects of programmability. At its 
> > > > core, P4 is a programming language that does a good job of 
> > > > abstracting the essence of a packet forwarding pipeline. It is 
> > > > enormously impressive that a P4 program can be compiled onto a 
> > > > PISA-based 
> > > > <https://substack.com/redirect/01cfb256-04e7-49f8-9600-55e147195
> > > > 5b
> > > > 8?j=
> > > > eyJ1IjoicnFhZzAifQ.CwdsLjQyIcRXfYRGUucLsXfrvggM3KKa9Z1jxtXNWH0>
> > > > switching chip that has the same performance, die area, cost, 
> > > > and power consumption of a fixed-function ASIC (and that 
> > > > equivalency was probably necessary for P4 to be taken 
> > > > seriously), but hitting that quantifiable mark is not 
> > > > sufficient. Well-designed languages are software tools that 
> > > > bring clarity to the intellectual challenge of programming. For 
> > > > me, the biggest “aha” moment of the Workshop was when Chris 
> > > > Sommers (long-time P4 contributor and new co-Chair of the API 
> > > > Working Group) started rattling off all the functions he’d been 
> > > > involved in writing in P4, and remarking on how natural P4 makes 
> > > > that process. There is certainly room to add new language 
> > > > features as P4 expands its domain to include SmartNICs and IPUs—as Chris and the other WG chairs are now pursuing—but having an existing target to evolve is a great position to be in.
> > > > 
> > > > One common thread that weaves its way through these three 
> > > > takeaways is that Intel’s cancellation of the Tofino 3 chip is a 
> > > > potentially helpful forcing
> > > > function: The P4 community has to demonstrate the value of the 
> > > > language without being buttressed by ever-improving performance 
> > > > numbers that have more to do with 7nm semiconductor technology 
> > > > than anything networking people have done. I saw a lot of 
> > > > evidence that exactly that is happening at last month’s 
> > > > workshop. The march to programmable networks is inevitable (in 
> > > > my view), and I’m still optimistic about the role P4 will play a central role.
> > > > 
> > > > Systems Approach is reader-supported and we are committed to 
> > > > keeping our books and articles open to all. To receive new posts 
> > > > and support our work, consider becoming a free or paid subscriber.
> > > > 
> > > > Upgrade to paid
> > > > <https://substack.com/redirect/2/eyJlIjoiaHR0cHM6Ly9zeXN0ZW1zYXB
> > > > wc
> > > > m9hY
> > > > 2guc3Vic3RhY2suY29tL3N1YnNjcmliZT90b2tlbj1leUoxYzJWeVgybGtJam8wT
> > > > mp
> > > > VM05
> > > > qSXlOQ3dpYVdGMElqb3hOamcwTVRNM016UTVMQ0psZUhBaU9qRTJPRFkzTWprek5
> > > > Ea
> > > > 3NJb
> > > > Wx6Y3lJNkluQjFZaTB5T0RNNU5ETWlMQ0p6ZFdJaU9pSmphR1ZqYTI5MWRDSjkuL
> > > > W5
> > > > LYUM
> > > > tRE1weEw3Smp0bHh4U1I0aEFFLXQ2QWltZ0lENFlFRC1BbWJicyZ1dG1fc291cmN
> > > > lP
> > > > XBvc
> > > > 3QiLCJwIjoxMjA2MDE1OTEsInMiOjI4Mzk0MywiZiI6dHJ1ZSwidSI6NDY1NzYyM
> > > > jQ
> > > > sIml
> > > > hdCI6MTY4NDEzNzM0OSwiZXhwIjoxNjg2NzI5MzQ5LCJpc3MiOiJwdWItMCIsInN
> > > > 1Y
> > > > iI6I
> > > > mxpbmstcmVkaXJlY3QifQ.lWjTeCLgxCt9OYaegbWWppVXvEzTeJBQs6psa45Oowg?
> > > > &utm
> > > > _medium=email&utm_source=subscribe-widget-preamble&utm_content=1
> > > > 20
> > > > 6015
> > > > 91>
> > > > 
> > > > ------------------------------
> > > > 
> > > > We continue to run into people who want to translate our books 
> > > > into other languages, and if you are one of them, you should 
> > > > definitely reach out to us. The latest entrant is a Portuguese 
> > > > translation 
> > > > <https://substack.com/redirect/e0ad5652-867f-4d2c-8cd6-3fc8b0f8e
> > > > da
> > > > 0?j=
> > > > eyJ1IjoicnFhZzAifQ.CwdsLjQyIcRXfYRGUucLsXfrvggM3KKa9Z1jxtXNWH0>
> > > > of our Private 5G book by Edmar Candeia Gurjão. You can find 
> > > > other translations of our books here 
> > > > <https://substack.com/redirect/0d0dad50-a3db-42e9-9ad6-95318436a540?j=eyJ1IjoicnFhZzAifQ.CwdsLjQyIcRXfYRGUucLsXfrvggM3KKa9Z1jxtXNWH0>.
> > > > 
> > > > 
> > > > You can follow us on Mastodon
> > > > <https://substack.com/redirect/3e6fc5cc-6a89-4a15-97bf-231cf12de9ec?j=eyJ1IjoicnFhZzAifQ.CwdsLjQyIcRXfYRGUucLsXfrvggM3KKa9Z1jxtXNWH0>.
> > > > 
> > > > 
> > > > You're currently a free subscriber to Systems Approach 
> > > > <https://substack.com/redirect/3d94c242-4758-4bf3-9e1d-62b5ce3f23ab?j=eyJ1IjoicnFhZzAifQ.CwdsLjQyIcRXfYRGUucLsXfrvggM3KKa9Z1jxtXNWH0>.
> > > > For the full experience, upgrade your subscription.
> > > > <https://substack.com/redirect/2/eyJlIjoiaHR0cHM6Ly9zeXN0ZW1zYXB
> > > > wc
> > > > m9hY
> > > > 2guc3Vic3RhY2suY29tL3N1YnNjcmliZT90b2tlbj1leUoxYzJWeVgybGtJam8wT
> > > > mp
> > > > VM05
> > > > qSXlOQ3dpYVdGMElqb3hOamcwTVRNM016UTVMQ0psZUhBaU9qRTJPRFkzTWprek5
> > > > Ea
> > > > 3NJb
> > > > Wx6Y3lJNkluQjFZaTB5T0RNNU5ETWlMQ0p6ZFdJaU9pSmphR1ZqYTI5MWRDSjkuL
> > > > W5
> > > > LYUM
> > > > tRE1weEw3Smp0bHh4U1I0aEFFLXQ2QWltZ0lENFlFRC1BbWJicyZ1dG1fc291cmN
> > > > lP
> > > > XBvc
> > > > 3QiLCJwIjoxMjA2MDE1OTEsInMiOjI4Mzk0MywiZiI6dHJ1ZSwidSI6NDY1NzYyM
> > > > jQ
> > > > sIml
> > > > hdCI6MTY4NDEzNzM0OSwiZXhwIjoxNjg2NzI5MzQ5LCJpc3MiOiJwdWItMCIsInN
> > > > 1Y
> > > > iI6I
> > > > mxpbmstcmVkaXJlY3QifQ.lWjTeCLgxCt9OYaegbWWppVXvEzTeJBQs6psa45Oowg?
> > > > &utm _source=substack&utm_medium=email&utm_content=postcta>
> > > > 
> > > > Upgrade to paid
> > > > <https://substack.com/redirect/2/eyJlIjoiaHR0cHM6Ly9zeXN0ZW1zYXB
> > > > wc
> > > > m9hY
> > > > 2guc3Vic3RhY2suY29tL3N1YnNjcmliZT90b2tlbj1leUoxYzJWeVgybGtJam8wT
> > > > mp
> > > > VM05
> > > > qSXlOQ3dpYVdGMElqb3hOamcwTVRNM016UTVMQ0psZUhBaU9qRTJPRFkzTWprek5
> > > > Ea
> > > > 3NJb
> > > > Wx6Y3lJNkluQjFZaTB5T0RNNU5ETWlMQ0p6ZFdJaU9pSmphR1ZqYTI5MWRDSjkuL
> > > > W5
> > > > LYUM
> > > > tRE1weEw3Smp0bHh4U1I0aEFFLXQ2QWltZ0lENFlFRC1BbWJicyZ1dG1fc291cmN
> > > > lP
> > > > XBvc
> > > > 3QiLCJwIjoxMjA2MDE1OTEsInMiOjI4Mzk0MywiZiI6dHJ1ZSwidSI6NDY1NzYyM
> > > > jQ
> > > > sIml
> > > > hdCI6MTY4NDEzNzM0OSwiZXhwIjoxNjg2NzI5MzQ5LCJpc3MiOiJwdWItMCIsInN
> > > > 1Y
> > > > iI6I
> > > > mxpbmstcmVkaXJlY3QifQ.lWjTeCLgxCt9OYaegbWWppVXvEzTeJBQs6psa45Oowg?
> > > > &utm _source=substack&utm_medium=email&utm_content=postcta>
> > > > 
> > > > Like
> > > > <https://substack.com/app-link/post?publication_id=283943&post_i
> > > > d=
> > > > 1206
> > > > 01591&utm_source=substack&isFreemail=true&submitLike=true&token=
> > > > ey
> > > > J1c2
> > > > VyX2lkIjo0NjU3NjIyNCwicG9zdF9pZCI6MTIwNjAxNTkxLCJyZWFjdGlvbiI6Iu
> > > > Kd
> > > > pCIs
> > > > ImlhdCI6MTY4NDEzNzM0OSwiZXhwIjoxNjg2NzI5MzQ5LCJpc3MiOiJwdWItMjgz
> > > > OT
> > > > QzIi
> > > > wic3ViIjoicmVhY3Rpb24ifQ.vN6AE7iLQvKkv98V0RaNKEWEX9UdKbdHQdc3nu9
> > > > 5K
> > > > yg&u
> > > > tm_medium=email>
> > > > Comment
> > > > <https://substack.com/app-link/post?publication_id=283943&post_i
> > > > d=
> > > > 1206
> > > > 01591&utm_source=substack&utm_medium=email&isFreemail=true&comme
> > > > nt
> > > > s=tr
> > > > ue&token=eyJ1c2VyX2lkIjo0NjU3NjIyNCwicG9zdF9pZCI6MTIwNjAxNTkxLCJ
> > > > pY
> > > > XQiO
> > > > jE2ODQxMzczNDksImV4cCI6MTY4NjcyOTM0OSwiaXNzIjoicHViLTI4Mzk0MyIsI
> > > > nN
> > > > 1YiI
> > > > 6InBvc3QtcmVhY3Rpb24ifQ.tQXs6dMHmFEgLKB4vUG4uGJTUSE0N7UdAH1qsj86
> > > > mC A&ut m_source=substack&utm_medium=email>
> > > > Restack
> > > > <https://substack.com/redirect/2/eyJlIjoiaHR0cHM6Ly9zeXN0ZW1zYXB
> > > > wc
> > > > m9hY
> > > > 2guc3Vic3RhY2suY29tL3AvdGhlLWZ1dHVyZS1vZi1wNC1vbmUtcGVyc3BlY3Rpd
> > > > mU
> > > > _dXR
> > > > tX3NvdXJjZT1zdWJzdGFjayZ1dG1fbWVkaXVtPWVtYWlsJmFjdGlvbj1yZXN0YWN
> > > > rL
> > > > WNvb
> > > > W1lbnQiLCJwIjoxMjA2MDE1OTEsInMiOjI4Mzk0MywiZiI6dHJ1ZSwidSI6NDY1N
> > > > zY
> > > > yMjQ
> > > > sImlhdCI6MTY4NDEzNzM0OSwiZXhwIjoxNjg2NzI5MzQ5LCJpc3MiOiJwdWItMCI
> > > > sI
> > > > nN1Y
> > > > iI6ImxpbmstcmVkaXJlY3QifQ.hfc7rMzN53dfpysbLYXxmtkw9siB9dPnC71KIavCOTo?
> > > > &utm_source=substack&utm_medium=email>
> > > > 
> > > > 
> > > > © 2023 Systems Approach, LLC
> > > > 548 Market Street PMB 72296, San Francisco, CA 94104 Unsubscribe 
> > > > <https://substack.com/redirect/2/eyJlIjoiaHR0cHM6Ly9zeXN0ZW1zYXB
> > > > wc
> > > > m9hY
> > > > 2guc3Vic3RhY2suY29tL2FjdGlvbi9kaXNhYmxlX2VtYWlsP3Rva2VuPWV5SjFjM
> > > > lZ
> > > > 5WDJ
> > > > sa0lqbzBOalUzTmpJeU5Dd2ljRzl6ZEY5cFpDSTZNVEl3TmpBeE5Ua3hMQ0pwWVh
> > > > Ra
> > > > U9qR
> > > > TJPRFF4TXpjek5Ea3NJbVY0Y0NJNk1UWTROamN5T1RNME9Td2lhWE56SWpvaWNIV
> > > > ml
> > > > MVEk
> > > > 0TXprME15SXNJbk4xWWlJNkltUnBjMkZpYkdWZlpXMWhhV3dpZlEuRXdaUkN3ZEd
> > > > jd
> > > > G8xd
> > > > FdwbmRVd3h2eXZKUk5pVmlOX2h1ZDBVNERDbVZYayZleHBpcmVzPTM2NWQiLCJwI
> > > > jo
> > > > xMjA
> > > > 2MDE1OTEsInMiOjI4Mzk0MywiZiI6dHJ1ZSwidSI6NDY1NzYyMjQsImlhdCI6MTY
> > > > 4N
> > > > DEzN
> > > > zM0OSwiZXhwIjoxNjg2NzI5MzQ5LCJpc3MiOiJwdWItMCIsInN1YiI6Imxpbmstc
> > > > mV kaXJ lY3QifQ.l6lDN2unh8JkUjeYEXjKiNFu7akDZ_FyOQUxaYockVM?>
> > > > 
> > > > [image: Start writing]
> > > > <https://substack.com/redirect/2/eyJlIjoiaHR0cHM6Ly9zdWJzdGFjay5
> > > > jb
> > > > 20vc
> > > > 2lnbnVwP3V0bV9zb3VyY2U9c3Vic3RhY2smdXRtX21lZGl1bT1lbWFpbCZ1dG1fY
> > > > 29
> > > > udGV
> > > > udD1mb290ZXImdXRtX2NhbXBhaWduPWF1dG9maWxsZWQtZm9vdGVyJmZyZWVTaWd
> > > > ud
> > > > XBFb
> > > > WFpbD1tYXJpZUBtam1vbnRwZXRpdC5jb20iLCJwIjoxMjA2MDE1OTEsInMiOjI4M
> > > > zk
> > > > 0Myw
> > > > iZiI6dHJ1ZSwidSI6NDY1NzYyMjQsImlhdCI6MTY4NDEzNzM0OSwiZXhwIjoxNjg
> > > > 2N
> > > > zI5M
> > > > zQ5LCJpc3MiOiJwdWItMCIsInN1YiI6ImxpbmstcmVkaXJlY3QifQ.GtVGEVhyYZ
> > > > __
> > > > pv96
> > > > bIPsssoL78rJrnvkIgcdwC4WQfs?>
> > > > --
> > > > Coin mailing list
> > > > [e-mail]
> > > > https://www.irtf.org/mailman/listinfo/coin
> > > 
> > > 
> 
> --
> ---
> [e-mail]



--
---
[e-mail]