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From: "Toke Høiland-Jørgensen" <toke@toke.dk>
To: Paolo Valente <paolo.valente@unimore.it>
Cc: bloat <bloat@lists.bufferbloat.net>
Subject: Re: [Bloat] bufferbloat effects on throughput
Date: Mon, 27 Apr 2015 11:20:35 +0200	[thread overview]
Message-ID: <87zj5u2aho.fsf@toke.dk> (raw)
In-Reply-To: <3E2406CD-0938-4C1F-B171-247CBB5E4C7D@unimore.it> (Paolo Valente's message of "Mon, 27 Apr 2015 10:59:48 +0200")

Paolo Valente <paolo.valente@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.

-Toke

  reply	other threads:[~2015-04-27  9:20 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-04-27  8:59 Paolo Valente
2015-04-27  9:20 ` Toke Høiland-Jørgensen [this message]
2015-04-27 12:01   ` Paolo Valente
2015-04-27 12:13     ` Toke Høiland-Jørgensen
2015-04-27 12:45       ` Paolo Valente
2015-04-27 13:01         ` Toke Høiland-Jørgensen
2015-04-27 14:19           ` Bill Ver Steeg (versteb)
2015-04-27 17:28             ` Dave Taht
2015-04-27 19:51               ` Bill Ver Steeg (versteb)

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