[Bloat] bufferbloat effects on throughput

[Paolo Valente]

Il giorno 27/apr/2015, alle ore 11:20, Toke Høiland-Jørgensen <toke at toke.dk> ha scritto:

> Paolo Valente <paolo.valente at unimore.it> writes:
> 
>> If there are, could anyone please point me to further reading on these
>> aspects?
> 
> Bufferbloat can definitely adversely affect throughput in some cases.
> Mainly because it causes throughput to oscillate: when the queue fills,
> a lot of data can be dropped at once, causing throughput to drop, which
> takes a while to recover. This can degrade aggregate throughput. Having
> smart queueing smoothes out the traffic, so the oscillations are lower
> and average throughput thus better.
> 
> The effect is most visible when you have several flows sharing a link:
> when the (FIFO) queue fills, they will tend to all experience drops at
> once, and so all slow down.
> 

Thanks. So, if I understood correctly, average throughput may or may not be affected, but large throughput fluctuations will always occur in the presence of bufferbloat.

Sorry for my usual refrain, but … any pointers to tests, results, papers and the like?

Thanks,
Paolo

> -Toke


--
Paolo Valente                                                 
Algogroup
Dipartimento di Fisica, Informatica e Matematica		
Via Campi, 213/B
41125 Modena - Italy        				  
homepage:  http://algogroup.unimore.it/people/paolo/