netdev - Re: Adding new packet scheduler

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Message-ID: <CAA93jw5jHMeNcDHUO4ZG=__J8y_Gv1Ogv7+_q1ctdtpK-_nd_A@mail.gmail.com>
Date:	Mon, 20 Oct 2014 10:46:44 -0700
From:	Dave Taht <dave.taht@...il.com>
To:	Josh Clark <jcinma@...il.com>
Cc:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: Adding new packet scheduler

On Mon, Oct 20, 2014 at 10:32 AM, Josh Clark <jcinma@...il.com> wrote:
> Hi everyone,
>
> I'm a student at NC State University, and I'm working on a project to
> implement some new classful AQM algorithms and test their
> effectiveness. However, I'm getting hung up on how to get the new
> algorithm set up in the kernel.
>
> From what I've looked at, it looks like I need to add my code to
> /net/sched/, and edit both the Kconfig and the Makefile to be able to
> add my code as another module.
>
> Finally, in order to use the new scheduler, I need to select it using
> the tc command. What do I need to do to add my algorithm to the tc
> command options?
>
> Any insight, articles, READMEs, or criticism you have for me is welcome.
>
> Thank you for all your help!

To give you an idea here are some currently out of tree, out of date,
and highly experimental codel patches of mine
that add in some new qdiscs, and patch the right places, with the
exception of patching include/uapi/linux/pkt_sched.h (which exports
the stuff to userspace)

https://github.com/dtaht/cerowrt-3.10/blob/master/target/linux/generic/patches-3.10/680-codel-add-experimental-codel-and-fq_codel-versions.patch

to add stuff to tc, you patch the iproute2 utility to match what is
exported from pkt_sched.h.




>
>
>
> -Josh Clark
> --
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-- 
Dave Täht

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