Am 05.06.2018 um 01:00 schrieb David Lang:
On Mon, 4 Jun 2018, Bless, Roland (TM) wrote:
Hi,
Am 24.05.2018 um 17:38 schrieb Jan Ceuleers:
Took 3 years after Dave approached them, but Ubuntu is finally adopting
fq_codel as the default qdisc.
Yes, if the Linux kernel is forwarding packets it makes a lot of sense,
but I don't understand why it make sense for ordinary end-systems.
Didn't Byte Queue Limits (BQL) suffice? Just curious...
no, BQL makes things much better (and make it possible for more advanced
quueing to take place), but you can still run into problems where a bulk
stream can flood the output queue so that other traffic suffers badly.
with fq_codel, the available bandwidth is distributed in a way that ends
up being much more functional.
It turns out that the behavior to prioritize new and sparse connections
significantly improves perceived performance (no more long delays in DNS
lookups before you start doing any real work for example)
without BQL, you can't even see the rest of the problems, but BQL
doesn't solve everything.
Just to make sure that I got your answer correctly. The benefit for
endsystems comes from the "fq" (flow queuing) part, not from the "codel"
part of fq_codel?
Mario Hock
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