It is my hope to get the cake qdisc into the Linux kernel in the next release cycle. We could definitely use more testers! The version we have here will compile against almost any kernel on any platform, dating back as far as 3.10, and has been integrated into the sqm-scripts and shipped in lede for ages...
But what I'm hoping for is for people to try it against their current linux kernels on x86, arm, ppc64, arm64, etc hardware, and document the kernel version, linux distribution, and any anomalies. To build it you need to have installed your kernel headers, and: git clone -b cobalt https://github.com/dtaht/sch_cake.git git clone https://github.com/dtaht/iproute2-cake-next.git cd sch_cake; make; sudo make install; cd .. cd iproute2-cake-next; make; # don't do a make install, instead something like export TC=`pwd`/tc/tc $TC qdisc add dev your_device root cake bandwidth XXMbit ack-filter And then pound it flat with whatever traffic types you like. In particular, getting some videoconferencing and flooding results would be great. There are a TON of features documented on the man page, several (ack-filter, wash) are not, as I write. Please comment via the [email protected] mailing list. THX! NOTE: flent has gained a lot of new features of late, including support for the new go based irtt tool, which can measure one way delay (which is also pretty nifty at the command line) flent: https://github.com/tohojo/ irtt: https://github.com/peteheist/irtt From the pending commit message: Add Common Applications Kept Enhanced (sch_cake) qdisc sch_cake is intended to squeeze the most bandwidth and lowest latency out of even the slowest ISP links and routers, while presenting an API simple enough that even an ISP can configure 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. * 8 way set associative queuing to reduce flow collisions to a minimum. * A reasonable interpretation of various diffserv latency/loss tradeoffs. * Support for washing diffserv for entering and exiting traffic. * Perfect support for interacting with Docsis 3.0 shapers. * Extensive support for DSL framing types. * (New) Support for ack filtering. - 20 % better throughput at a 16x1 down/up ratio on the rrul test. * 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. 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. -- Dave Täht CEO, TekLibre, LLC http://www.teklibre.com Tel: 1-669-226-2619 _______________________________________________ Cake mailing list [email protected] https://lists.bufferbloat.net/listinfo/cake
