Public bug reported:
At present the Ubuntu 20.04 linux-image-kvm kernel package don't include
the tcp_bbr, sch_cake and sch_fq_codel kernel modules. The latter has
been default on desktop for a number of release cycles; cake improves on
this.
These queueing disciplines are instrumental to reducing queueing latency
[bufferbloat.net]; the TCP congestion control algo elevates bandwidth on
lossy paths (think clients on radio networks).
Enabling these kernel modules will ensure Ubuntu has an optimally
competitive network stack in cloud/VM systems.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Incomplete
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https://bugs.launchpad.net/bugs/1916869
Title:
linux-image-kvm package missing key network qdisc/TCP CC modules
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