From: Eric Dumazet <eric.dumazet@gmail.com>
To: Dave Taht <dave.taht@gmail.com>
Cc: "Steinar H. Gunderson" <sesse@samfundet.no>,
bloat <bloat@lists.bufferbloat.net>
Subject: Re: [Bloat] AQM creeping into L2 equipment
Date: Sun, 23 Mar 2014 12:27:39 -0700 [thread overview]
Message-ID: <1395602859.9117.19.camel@edumazet-glaptop2.roam.corp.google.com> (raw)
In-Reply-To: <CAA93jw7fKY_5tvFFO7fUeCnayJeF3UPaEhUioFmkX5U36LNiOQ@mail.gmail.com>
On Fri, 2014-03-21 at 22:13 +0000, Dave Taht wrote:
> Are you ready to make sch_fq the default in 3.15?
sch_fq depends on ktime_get(), so it is a no go if you have
clocksource using hpet. pfifo_fast doesn't have such issues.
Another issue is TCP CUBIC Hystart 'ACK TRAIN' detection that triggers
early, since goal of TSO autosizing + FQ/pacing is to get ACK clocking
every ms. By design, it tends to get ACK trains, way before the cwnd
might reach BDP.
next prev parent reply other threads:[~2014-03-23 19:27 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-18 14:52 Steinar H. Gunderson
2014-03-18 17:17 ` Dave Taht
2014-03-18 17:53 ` Steinar H. Gunderson
2014-03-19 22:22 ` Steinar H. Gunderson
2014-03-18 18:05 ` Fred Baker (fred)
2014-03-18 18:54 ` Dave Taht
2014-03-20 16:20 ` Toke Høiland-Jørgensen
2014-03-20 16:29 ` Dave Taht
2014-03-20 16:44 ` Toke Høiland-Jørgensen
2014-03-20 17:14 ` Dave Taht
2014-03-20 19:34 ` Aaron Wood
2014-03-20 20:23 ` Dave Taht
2014-03-20 23:41 ` Eric Dumazet
2014-03-20 23:45 ` Steinar H. Gunderson
2014-03-20 23:54 ` Steinar H. Gunderson
[not found] ` <CAAvOmMtt1RCpBfT1MPNh-2FRhQ1GN4xYbfNPLYJwfP6CaP5vow@mail.gmail.com>
2014-03-21 15:06 ` Eric Dumazet
[not found] ` <CAAvOmMvPpmuW1chTdX86s5sQv6X_c622k8YrjW+hN8e5JV+dzA@mail.gmail.com>
2014-03-21 17:51 ` Eric Dumazet
2014-03-21 18:08 ` Dave Taht
2014-03-21 22:00 ` Eric Dumazet
2014-03-21 22:13 ` Dave Taht
2014-03-23 19:27 ` Eric Dumazet [this message]
2014-03-21 13:41 ` Toke Høiland-Jørgensen
2014-03-21 15:39 ` Dave Taht
2014-03-21 16:42 ` Steinar H. Gunderson
2014-03-21 18:34 ` Toke Høiland-Jørgensen
2014-03-24 23:16 ` David Lang
2014-03-20 18:16 ` [Bloat] AQM creeping into L2 equipment / 10G not-for-profit playground at tetaneutral.net Laurent GUERBY
2014-03-18 18:57 ` [Bloat] AQM creeping into L2 equipment Dave Taht
2014-03-18 21:06 ` Steinar H. Gunderson
2014-03-19 13:11 ` Nikolay Shopik
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