> On 11 Dec, 2019, at 9:54 pm, Dave Taht <dave.t...@gmail.com> wrote: > > The DC folk want a multibit more immediate signal, for which L4S is > kind of targetted, (and SCE also > applies). I haven't seen any data on how well dctcp or SCE -style can > work on wildly RTT varying links as yet, although it's been pitched at > the LTE direction, not at wifi.
It turns out that a Codel marking strategy for SCE, with modified parameters of course, works well for tolerating bursty and aggregating links. The RED-ramp and step-function strategies do not - and they're equally bad if the same test scenario is applied to DCTCP or TCP Prague. The difference is not small; switching from RED to Codel improves goodput from 1/8th to 80% of nominal link capacity, when a rough model of wifi characteristics is inserted into our usual Internet-path scenario. We're currently exploring how best to set the extra set of Codel parameters involved. - Jonathan Morton _______________________________________________ Bloat mailing list Bloat@lists.bufferbloat.net https://lists.bufferbloat.net/listinfo/bloat
