Hi Dave,
> On Aug 31, 2023, at 04:49, Dave Taht via Cake <cake@lists.bufferbloat.net> > wrote: > > From: > https://docs.google.com/document/d/1tTYBPeaRdCO9AGTGQCpoiuLORQzN_bG3TAkEolJPh28/edit#heading=h.s3q8pyu1s825 > > ... > > The kernel has over 2500 places where it can drop packets, many of > which have been instrumented with the “Drop_reason” facility. No > qdisc has drop_reason encoded into it yet. (Suggested names: > DROP_REASON_{CONGEST, OVERFLOW, FLOOD, SPIKE}). > > QOS-MAP mirroring the same syntax as the wifi interface, this > establishes a direct correspondence between cake “tins” and the > settings for the linux wifi qos-map facility. [SM] Not a big fan of the qos_map syntax, but I agree that being able to configure the cake DSCP-2-tin mapping from tc seems worthwhile, and not reinventing the wheel with a new way to request that mapping has merits as well (plus one could use the same string for both cake and WiFI), so +1. > VLAN-MAP This maps from vlans to tins [SM] This will IMHO require to switch cake from soft tin-enforcement to strict tin capacity share enforcement (at least under competition) as otherwise the expected priorities are not delivered any more. But I might misunderstand how cake deals with tin's exceeding their share. For normal operation just telling users, do not put greedy traffic into anything > BE seems OK, but for VLANs that will not really fly IMHO. > NOWASHNQB - cake defaults to nowash allowing the passage of all dscps, > the addition of the NOWASHNQB state means it will wash out everything > except NQB. [SM] This assumes that NQB will actually work over the existing internet reliably enough to make people switch away from say EF or VA. I think this is wishful thinking (backed in the case of the NQB by underwhelming engineering, and externalization of costs), that said such a feature seems rather benign. Question, many cake keywords come in a negated form e.g. no-ack-filter, so one would expect NOWASHNQB to also come in the form WASHNQB to only wash NQB? Regards Sebastian > > > -- > Oct 30: https://netdevconf.info/0x17/news/the-maestro-and-the-music-bof.html > Dave Täht CSO, LibreQos > _______________________________________________ > Cake mailing list > Cake@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/cake _______________________________________________ Cake mailing list Cake@lists.bufferbloat.net https://lists.bufferbloat.net/listinfo/cake
