Linux: RPi kernel with support for CONFIG_NET_SCH_CAKE
On 4.19.66-v7+ kernel, I see CONFIG_NET_SCH_CAKE is not set.
CAKE (Common Applications Kept Enhanced) is a shaping-capable queue discipline which uses both AQM and FQ.
CAKE is new network packet scheduler and is enabled in 4.19 in Debian Buster. It's new in kernel 4.19, as it was merged in that version into official Linux sources, but was in development for longer. For example Turris Omnia with their custom kernel 4.4 has CAKE module available. Main advantage which I'm looking for with CAKE is autorate-ingress capability, where scheduler tries to optimize packet scheduling based on dynamic bandwidth of the link. I'm targeting use of Raspberry Pi and Raspian Buster with LTE modems, where bandwidth is dynamic. Buster is needed to have fresh enough iproute2 package.
Could you please add CONFIG_NET_SCH_CAKE=m to the kernel config to make available sch_cake.ko module?
kucharskim
All 7 comments
As requested in the previous issue (https://github.com/raspberrypi/linux/issues/3006#issuecomment-500340074), what are the implications of building this module? Is it only the one .ko module that is added, or are there additional dependencies?
6by9
on 24 Aug 2019
I guess only the .ko module is enough, as we have Buster now.
I tried CAKE on my Pi 2B 1.1 router myself.
It would boot fast in 1 or 2 mintues, as CAKE is an all-in-one style module. My old setup was hfsc + qfq + pie , which needs three modules, and the qfq module need a bash "for" statement to construct the structure, which would take about 5 minutes.
CAKE support DSCP diffserv, so Torrent boxes runs better.
CAKE has a TCP ACK filter in it. So on a link in which upload is slow but download is fast, CAKE would give more performance. This would also give a better wireless performance, because mostly, wireless AP have a better antenna than clients.
wu-yue
on 15 Sep 2019
@pelwell As its a module, would adding this be a an issue?
JamesH65
on 20 Dec 2019
An hour before taking an extended break is acknowledged to be the best time to make changes to software, so see https://github.com/raspberrypi/linux/commit/8408353fec8a07f322db1ab3e2960050a2c86946.
pelwell
on 20 Dec 2019
I am waiting for cake at raspbian ,too :)
yutayu
on 22 Jan 2020
Seems to lib released to general public. Example from one of my RPi boxes, running official Raspbian Buster:
# uname -rv
4.19.93-v7+ #1290 SMP Fri Jan 10 16:39:50 GMT 2020
# find /lib/modules/ -name '*cake*' | sort
/lib/modules/4.19.93+/kernel/net/sched/sch_cake.ko
/lib/modules/4.19.93-v7+/kernel/net/sched/sch_cake.ko
/lib/modules/4.19.93-v7l+/kernel/net/sched/sch_cake.ko
/lib/modules/4.19.93-v8+/kernel/net/sched/sch_cake.ko
Thank you @pelwell for making this happen!
kucharskim
on 22 Jan 2020
@kucharskim @pelwell
Thank, I confirmed this on raspbian :)
Great and Happy.
yutayu
on 22 Jan 2020
Related issues
incyi
·
9Comments
Nuntis-Spayz
·
5Comments
wudo94
·
5Comments
ensarkarabudak
·
7Comments
ncguk
·
4Comments
Most helpful comment
An hour before taking an extended break is acknowledged to be the best time to make changes to software, so see https://github.com/raspberrypi/linux/commit/8408353fec8a07f322db1ab3e2960050a2c86946.