[Cake] signed-off-by requests
dave.taht at gmail.com
Thu Nov 23 16:55:54 EST 2017
If anyone wants to add a signed-of-by, acked-by, or tested-by to the
next patchset let me know.
On Tue, Nov 21, 2017 at 11:46 PM, Toke Høiland-Jørgensen <toke at toke.dk> wrote:
> Dave Taht <dave at taht.net> writes:
>> And now I can comment.
>> I've added this version to a for_upstream branch in the hope that future
>> commits can be kept in sync.
>> Is there anything more that should be added to the commit message?
>> Should I be less snarky?
>>> while presenting an API simple enough that even an ISP can configure
> I chuckled at this part at least. I'd say keep it ;)
>>> Example of use on an ISP uplink:
>>> tc qdisc add dev eth0 cake bandwidth 20Mbit nat docsis ack-filter
>>> Cake can also be used in unlimited mode to drive packets at the speed
>>> of the underlying link.
>>> Cake is filled with:
>>> * A hybrid Codel/Blue AQM algorithm, “Cobalt”, tied to an FQ_Codel
>>> derived Flow Queuing system, which autoconfigures based on the bandwidth.
>>> * A unique "triple-isolate" mode (the default) which balances per-flow
>>> and per-host flow FQ even through NAT.
>>> * An integral deficit based shaper with extensive dsl and docsis support
>>> that can also be used in unlimited mode.
> "dsl and docsis link layer compensation support"? Not sure someone
> who hasn't drunk the koolaid understands how a shaper can have "dsl and
> docsis support"
>>> * 8 way set associative queuing to reduce flow collisions to a
> 8-way set-associative hashing
>>> * A reasonable interpretation of various diffserv latency/loss
> Heh. Not sure the word 'reasonable' can reasonably be applied to
> diffserv ;)
>>> * Support for washing diffserv for entering and exiting traffic.
> The term 'washing' is also internal; explain it? ("washing (zeroing)
> diffserv markings")
>>> * Perfect support for interacting with Docsis 3.0 shapers.
> What does that mean?
>>> * Extensive support for DSL framing types.
> Aren't you just repeating yourself from above now?
>>> * (New) Support for ack filtering.
>>> - 20 % better throughput at a 16x1 down/up ratio on the rrul test.
> From the PoV of an upstream submission it's all new, isn't it? Also,
> this is the only place where you cite benchmark results.
>>> * Extensive statistics for measuring, loss, ecn markings, latency variation.
>>> There are some features still considered experimental, notably the
>>> ingress_autorate bandwidth estimator and cobalt itself.
>>> Various versions shipping have been available as an out of tree build for
>>> kernel versions going back to 3.10, as the embedded router world has been
>>> running a few years behind mainline Linux. A stable version has been
>>> generally available on lede-17.01 and later.
>>> sch_cake replaces a combination of iptables, tc filter, htb and fq_codel in
>>> the sqm-scripts, with sane defaults and vastly easier configuration.
>>> Cake's principal author is Jonathan Morton, with contributions from
>>> Kevin Darbyshire-Bryant, Toke Høiland-Jørgensen, Sebastian Moeller,
>>> Ryan Mounce, Dean Scarff, Guido Sarducci, Nils Andreas Svee, Dave Täht, and
>>> Loganaden Velvindron.
> But no Signed-off-by? :)
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