Re: [iccrg] [tcpm] A description of Linux pacing

Neal and I have a short paper on Linux pacing, which integrates TSQ, and
TSO autosizing. it has evolved over the years but the core design remains.
https://netdevconf.info/1.2/papers/bbr-netdev-1.2.new.new.pdf

On Wed, Mar 20, 2024 at 12:42 AM Michael Welzl <michawe@ifi.uio.no> wrote:

> Hi,
>
> and thanks for your feedback!
>
> I agree; I can write this up in time for the Vancouver IETF. As for
> documenting other implementations, I don’t know internals of any others…
> but I’m very willing to involve others in such an I-D - if any expert on a
> different OS is interested, get in touch!
>
> Else, I could just make a start with this and see where it goes. It’s not
> much work, I can keep it short and simple.
>
> Cheers,
> Michael
>
>
> On 12 Mar 2024, at 23:08, Martin Duke <martin.h.duke@gmail.com> wrote:
>
> Speaking as an individual, it's a bummer we don't have a real RFC about
> pacing, this would be a decent Informational RFC for a way to do pacing,
> that is also a useful reference for how an important implementation does it.
>
> Even more ambitious, one could document the approaches of several major
> implementations.
>
> On Mon, Feb 19, 2024 at 6:06 AM Michael Welzl <michawe@ifi.uio.no> wrote:
>
>> Dear TCPM and ICCRG (I assume that there’s so much overlap with people in
>> CCWG that it would just be spamming to send it there too?),
>>
>> Over the last two weeks or so, I have put some effort into trying to
>> understand how Linux pacing *really* works  (I had some descriptions that
>> were somewhat high-level; I wanted to obtain a more precise lower-level
>> understanding).
>> I wrote a document, just for myself, explaining what goes on in the code,
>> as I can’t even try to follow the Linux kernel without taking notes.
>>
>> After a first iteration, I shared it with the bufferbloat mailing list,
>> in the hope of getting corrections.
>> I did!  Most notably (but not only), Neal Cardwell helped me a ton - and
>> now the document should be quite thorough and hopefully correct.
>>
>> While I only did this for myself and just asked the list for help,
>> several people have in the meantime told me that this document is actually
>> valuable for the community - and so I thought I should share it here, too.
>> It lives as a Google doc at this URL:
>>
>> https://docs.google.com/document/d/1-uXnPDcVBKmg5krkG5wYBgaA2yLSFK_kZa7xGDWc7XU/edit?usp=sharing
>>
>> Comments or fixes are very welcome!
>> Please feel free to forward this as you want.
>>
>> I know that Google docs is not the format that we people here normally
>> use  :-)   well, if someone thinks that it would indeed be useful to write
>> this up as an I-D (probably skipping all the code details though), please
>> let me know - I can do that, and I can also present it if there’s interest
>> (but in Vancouver, not Brisbane).
>>
>> Cheers,
>> Michael
>>
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>
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