From: "Toke Høiland-Jørgensen" <toke@toke.dk>
To: Pete Heist <pete@heistp.net>
Cc: Jonathan Morton <chromatix99@gmail.com>,
Cake List <cake@lists.bufferbloat.net>
Subject: Re: [Cake] cake at 60gbit
Date: Fri, 06 Jul 2018 13:33:19 +0200 [thread overview]
Message-ID: <87in5sbnuo.fsf@toke.dk> (raw)
In-Reply-To: <87lgaobq0m.fsf@toke.dk>
AHA! Found the culprit!
The bulk dequeue mechanism in sch_generic.c will dequeue a bunch of
packets at once, then check if they belong on the same hardware txq. If
they don't, they will be put back on a separate queue in the qdisc
structure (sch->skb_bad_txq), and the qlen will be increased, without
telling the qdisc about it.
This obviously only happens on hardware with multiple TXQs, which is why
the bug doesn't happen on veth.
Now, to figure out what to do about it...
-Toke
next prev parent reply other threads:[~2018-07-06 11:33 UTC|newest]
Thread overview: 77+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <mailman.381.1530347349.3512.cake@lists.bufferbloat.net>
2018-06-30 16:37 ` [Cake] Cake on openwrt - falling behind Georgios Amanakis
2018-06-30 17:26 ` Pete Heist
2018-06-30 18:09 ` Georgios Amanakis
2018-06-30 18:55 ` Kevin Darbyshire-Bryant
2018-06-30 19:57 ` Pete Heist
2018-06-30 20:58 ` Georgios Amanakis
2018-06-30 21:37 ` Pete Heist
2018-06-30 22:43 ` Pete Heist
2018-06-30 23:20 ` Pete Heist
[not found] ` <CACvFP_gkdAPKSEO7j9+cMPqTa-fJYd8XFEEBD6ZzLuVvaNwsvg@mail.gmail.com>
2018-07-01 2:37 ` [Cake] Fwd: " Georgios Amanakis
2018-07-01 7:18 ` [Cake] " Pete Heist
2018-07-01 13:48 ` Pete Heist
2018-07-01 14:02 ` Dave Taht
2018-07-01 15:30 ` Pete Heist
2018-07-01 14:38 ` Kevin Darbyshire-Bryant
2018-07-01 16:54 ` Pete Heist
2018-07-01 19:41 ` Kevin Darbyshire-Bryant
2018-07-02 10:19 ` Pete Heist
2018-07-02 11:38 ` Pete Heist
2018-07-02 11:59 ` Kevin Darbyshire-Bryant
2018-07-02 14:01 ` Pete Heist
2018-07-02 12:03 ` Toke Høiland-Jørgensen
2018-07-02 14:51 ` Pete Heist
2018-07-02 16:14 ` Toke Høiland-Jørgensen
2018-07-02 16:59 ` Kevin Darbyshire-Bryant
2018-07-02 17:04 ` Pete Heist
2018-07-02 17:12 ` Kevin Darbyshire-Bryant
2018-07-02 18:24 ` Pete Heist
2018-07-02 19:31 ` Toke Høiland-Jørgensen
2018-07-02 20:09 ` Pete Heist
2018-07-02 20:11 ` Toke Høiland-Jørgensen
2018-07-02 20:46 ` Pete Heist
[not found] ` <mailman.407.1530550780.3512.cake@lists.bufferbloat.net>
2018-07-02 17:50 ` Kevin Darbyshire-Bryant
2018-07-02 19:33 ` Toke Høiland-Jørgensen
2018-07-02 19:36 ` Kevin Darbyshire-Bryant
2018-07-02 19:39 ` Toke Høiland-Jørgensen
2018-07-02 20:03 ` [Cake] cake at 60gbit Dave Taht
2018-07-02 20:09 ` Toke Høiland-Jørgensen
2018-07-02 21:16 ` Pete Heist
2018-07-02 21:35 ` Toke Høiland-Jørgensen
2018-07-02 22:07 ` Georgios Amanakis
2018-07-02 22:12 ` Dave Taht
2018-07-02 23:48 ` Georgios Amanakis
2018-07-02 22:23 ` Toke Høiland-Jørgensen
2018-07-03 7:35 ` Pete Heist
2018-07-03 9:18 ` Jonathan Morton
2018-07-03 9:57 ` Pete Heist
2018-07-03 10:27 ` Toke Høiland-Jørgensen
2018-07-03 10:41 ` Pete Heist
2018-07-05 22:31 ` Toke Høiland-Jørgensen
2018-07-05 23:48 ` Georgios Amanakis
2018-07-06 1:21 ` Dave Taht
2018-07-06 2:55 ` George Amanakis
2018-07-06 3:06 ` George Amanakis
2018-07-06 9:22 ` Toke Høiland-Jørgensen
2018-07-06 9:21 ` Toke Høiland-Jørgensen
2018-07-06 8:55 ` Pete Heist
2018-07-06 9:29 ` Toke Høiland-Jørgensen
2018-07-06 10:00 ` Pete Heist
2018-07-06 10:46 ` Toke Høiland-Jørgensen
2018-07-06 11:33 ` Toke Høiland-Jørgensen [this message]
2018-07-06 11:43 ` Jonathan Morton
2018-07-06 11:48 ` Toke Høiland-Jørgensen
2018-07-06 11:58 ` Pete Heist
2018-07-06 12:04 ` Toke Høiland-Jørgensen
2018-07-02 18:39 ` [Cake] Cake on openwrt - falling behind Dave Taht
2018-07-02 19:11 ` Kevin Darbyshire-Bryant
2018-07-02 19:23 ` Toke Høiland-Jørgensen
2018-07-02 19:27 ` Dave Taht
2018-07-02 19:38 ` Toke Høiland-Jørgensen
2018-07-02 20:05 ` Toke Høiland-Jørgensen
2018-07-02 19:31 ` Pete Heist
[not found] ` <mailman.397.1530474091.3512.cake@lists.bufferbloat.net>
2018-07-01 23:55 ` Dave Taht
2018-07-02 0:05 ` Dave Taht
[not found] ` <mailman.392.1530455913.3512.cake@lists.bufferbloat.net>
2018-07-01 15:17 ` Jonathan Morton
[not found] ` <mailman.384.1530384918.3512.cake@lists.bufferbloat.net>
2018-07-01 9:46 ` Magnus Olsson
2018-07-01 12:34 ` Kevin Darbyshire-Bryant
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