On Tue, Sep 20, 2016 at 4:42 PM, Neal Cardwell <ncardw...@google.com> wrote:
>
> On Tue, Sep 20, 2016 at 7:39 PM, Stephen Hemminger
> <step...@networkplumber.org> wrote:
> >
> >> NOTE: BBR *must* be used with the fq qdisc ("man tc-fq") with pacing
> >> enabled, since pacing is integral to the BBR design and
> >> implementation. BBR without pacing would not function properly, and
> >> may incur unnecessary high packet loss rates.
> >
> > Does it work with fq_codel?
>
> Good question. Since fq_codel does not (currently) implement pacing,
> it would not be sufficient to get the required behavior.
>
> nealfq_codel is stochastic, so it wont work very well on hosts with 1,000,000 flows or more... fq_codel is aimed for routers, while sch_fq targets hosts, implementing pacing at a minimal cost (one high resolution timer per qdisc)
