[Cerowrt-devel] [Cake] https://tools.ietf.org/html/draft-ietf-tsvwg-le-phb-06 is in last call

[Dave Taht]

Kevin Darbyshire-Bryant <kevin at darbyshire-bryant.me.uk> writes:

> Maybe attached patch is more comprehensive?

Yep! why was diffserv8 5 in the first place?

>
> KDB
>
>> On 21 Aug 2019, at 16:07, Dave Taht <dave.taht at gmail.com> wrote:
>> 
>> Just ressurrecting this old thread for review now that this is an
>> official RFC. I note also that the NQB diffserv codepoint is entering
>> last call also.
>> 
>> https://tools.ietf.org/html/draft-white-tsvwg-nqb-02
>> 
>> On Sun, Feb 3, 2019 at 10:39 AM Dave Taht <dave.taht at gmail.com> wrote:
>>> 
>>> And seems likely to be adopted.
>>> 
>>> There seems to be an urge to make this codepoint starvable, which
>>> since I ascribe to nagle's dictum "every application has a right to
>>> one packet in the network" - doesn't work for me - but the draft is
>>> vaguely worded enough to just start dumping this codepoint into the
>>> background queue of both sqm and cake and worry about it in a decade
>>> or three.
>>> 
>>> it's 000001 which I guess is:
>>> 
>>> diff --git a/sch_cake.c b/sch_cake.c
>>> index 3a26db0..67263b3 100644
>>> --- a/sch_cake.c
>>> +++ b/sch_cake.c
>>> @@ -343,7 +343,7 @@ static const u8 diffserv4[] = {
>>> };
>>> 
>>> static const u8 diffserv3[] = {
>>> -       0, 0, 0, 0, 2, 0, 0, 0,
>>> +       0, 1, 0, 0, 2, 0, 0, 0,
>>>        1, 0, 0, 0, 0, 0, 0, 0,
>>>        0, 0, 0, 0, 0, 0, 0, 0,
>>>        0, 0, 0, 0, 0, 0, 0, 0,
>>> 
>>> (or is that reversed? my big endian/little endian chops scuks, and
>>> nobody modified the gen_cake_const tool to match what cake expects
>>> now)
>>> 
>>> on my off days I kind of wish the diffserv lookup we do in cake had
>>> managed to make it into the linux mqprio/prio stuff by default.
>>> 
>>> --
>>> 
>>> Dave Täht
>>> CTO, TekLibre, LLC
>>> http://www.teklibre.com
>>> Tel: 1-831-205-9740
>> 
>> 
>> 
>> --
>> 
>> Dave Täht
>> CTO, TekLibre, LLC
>> http://www.teklibre.com
>> Tel: 1-831-205-9740
>> _______________________________________________
>> Cake mailing list
>> Cake at lists.bufferbloat.net
>> https://lists.bufferbloat.net/listinfo/cake
>
>
> Cheers,
>
> Kevin D-B
>
> gpg: 012C ACB2 28C6 C53E 9775  9123 B3A2 389B 9DE2 334A
>
> From 1f460443d1bd54d269e3efda6999c0bbd91f7a03 Mon Sep 17 00:00:00 2001
> From: Kevin Darbyshire-Bryant <ldir at darbyshire-bryant.me.uk>
> Date: Mon, 4 Feb 2019 21:27:58 +0000
> Subject: [PATCH] RFC 8622 diffserv3, 4 & 8 LE PHB support
>
> Change tin mapping on diffserv3, 4 & 8 for LE PHB support,
> in essence make LE a member of the Bulk tin.
>
> Bulk has the least priority and minimum of 1/16th total bandwidth in the
> face of higher priority traffic.
>
> NB: Diffserv 3 & 4 swap tin 0 & 1 priorities from the default order as
> found in diffserv8, in case anyone is wondering why it looks a bit odd.
>
> Signed-off-by: Kevin Darbyshire-Bryant <ldir at darbyshire-bryant.me.uk>
> ---
>  sch_cake.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/sch_cake.c b/sch_cake.c
> index 93c0c8a..81950ad 100644
> --- a/sch_cake.c
> +++ b/sch_cake.c
> @@ -333,8 +333,8 @@ static const u8 precedence[] = {
>  };
>  
>  static const u8 diffserv8[] = {
> -	2, 5, 1, 2, 4, 2, 2, 2,
> -	0, 2, 1, 2, 1, 2, 1, 2,
> +	2, 0, 1, 2, 4, 2, 2, 2,
> +	1, 2, 1, 2, 1, 2, 1, 2,
>  	5, 2, 4, 2, 4, 2, 4, 2,
>  	3, 2, 3, 2, 3, 2, 3, 2,
>  	6, 2, 3, 2, 3, 2, 3, 2,
> @@ -344,7 +344,7 @@ static const u8 diffserv8[] = {
>  };
>  
>  static const u8 diffserv4[] = {
> -	0, 2, 0, 0, 2, 0, 0, 0,
> +	0, 1, 0, 0, 2, 0, 0, 0,
>  	1, 0, 0, 0, 0, 0, 0, 0,
>  	2, 0, 2, 0, 2, 0, 2, 0,
>  	2, 0, 2, 0, 2, 0, 2, 0,
> @@ -355,7 +355,7 @@ static const u8 diffserv4[] = {
>  };
>  
>  static const u8 diffserv3[] = {
> -	0, 0, 0, 0, 2, 0, 0, 0,
> +	0, 1, 0, 0, 2, 0, 0, 0,
>  	1, 0, 0, 0, 0, 0, 0, 0,
>  	0, 0, 0, 0, 0, 0, 0, 0,
>  	0, 0, 0, 0, 0, 0, 0, 0,