netdev - Re: [PATCH v3 net-next] tcp: TCP Small Queues

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Message-ID: <CAB_+Fg5dwsNYkL+rQ4HsrDyHi-3w+EcLjWr0F=HbyLPyXT25AQ@mail.gmail.com>
Date:	Wed, 11 Jul 2012 17:46:35 -0700
From:	Nandita Dukkipati <nanditad@...gle.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	David Miller <davem@...emloft.net>, ycheng@...gle.com,
	dave.taht@...il.com, codel@...ts.bufferbloat.net,
	netdev@...r.kernel.org, ncardwell@...gle.com,
	mattmathis@...gle.com, andrewmcgr@...il.com, therbert@...gle.com
Subject: Re: [PATCH v3 net-next] tcp: TCP Small Queues

>> Considering these two points, why TSQ over the Codel feedback
>> approach?
>
> I dont think they compete. They are in fact complementary.
>
> If you use codel/fq_codel + TSQ, you have both per flow limitation in
> qdisc (TSQ) + sojourn time aware and multi flow aware feedback.

Makes sense. My conjecture is when using codel/fq_codel qdisc, the
need for TSQ will diminish. But as you said... good part of TSQ is it
limits per-flow queuing for any qdisc structure, even those not using
codel.
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