[Cake] Fwd: [NetDev-People] 0x19: Talk, mq-cake: Scaling software rate limiting across CPU cores

["Toke Høiland-Jørgensen" <toke@toke.dk>]

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FYI :)


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From: Jamal Hadi Salim via people <people@netdevconf.info>
To: people <people@netdevconf.info>
Cc: Kimberley Jeffries <kimberleyjeffries@gmail.com>, Lael Santos <lael.santos@expertisesolutions.com.br>, program-committee@netdevconf.info, Bruno Banelli <bruno.banelli@sartura.hr>, j.koeppeler@tu-berlin.de, stefan.schmid@tu-berlin.de, Jamal Hadi Salim <jhs@mojatatu.com>
Subject: [NetDev-People] 0x19: Talk, mq-cake: Scaling software rate limiting across CPU cores
Date: Sun, 9 Feb 2025 08:37:41 -0500

Qdiscs rely on global lock to sync state across CPUs and therefore
dont scale in presence of many cores (or in presence of very high
bandwidth).
Jonas Köppeler, Toke Høiland-Jørgensen, and Stefan Schmid implemented
a multi-queue variant of sch_cake that can scale its rate limiting
across hardware queues (and thus CPU cores) by sharing a bit of state
on top of the mq qdisc.

In this talk, they will present the implementation, performance
evaluation, as well as discuss their proposal for an API that will
make this work upstreamable, and applicable to other qdiscs as well.

Details: https://netdevconf.info/0x19/16

cheers,
jamal
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