From: Eric Dumazet <eric.dumazet@gmail.com>
To: Dave Taht <dave.taht@gmail.com>
Cc: Roman Yeryomin <leroi.lists@gmail.com>,
Jonathan Morton <chromatix99@gmail.com>,
make-wifi-fast@lists.bufferbloat.net,
"codel@lists.bufferbloat.net" <codel@lists.bufferbloat.net>,
ath10k <ath10k@lists.infradead.org>,
Michal Kazior <michal.kazior@tieto.com>
Subject: Re: [Make-wifi-fast] [Codel] fq_codel_drop vs a udp flood
Date: Mon, 02 May 2016 10:44:48 -0700 [thread overview]
Message-ID: <1462211088.5535.262.camel@edumazet-glaptop3.roam.corp.google.com> (raw)
In-Reply-To: <CAA93jw6Wv0jcwN5Ct2ro65vWDXSdaLO_srwJrbJm7D_W5Z2+zw@mail.gmail.com>
On Mon, 2016-05-02 at 10:08 -0700, Dave Taht wrote:
> On Mon, May 2, 2016 at 9:14 AM, Eric Dumazet <eric.dumazet@gmail.com> wrote:
> >
> > I want to check your qdisc configuration, the one that you used and
> > where you had fq_codel performance issues
> >
> > tc -s -d qdisc
>
> Not sure it's the qdisc version under test here. ? If it is, I'd be
> perversely happy as for the first time ever the wifi layer started
> exerting some backpressure on the upper layers of the stack.
I wrote fq_codel with a configurable limit of packets.
Default is 10240
I want to see what limit was set on this particular qdisc.
All qdisc are going to drop hell of packets, if say limit is set to 5.
Claiming they are buggy is quite misleading.
fq_codel was designed with the hope of dropping in excess packets at
dequeue() time, not enqueue() time.
Apparently someone did not understand this part.
next prev parent reply other threads:[~2016-05-02 17:44 UTC|newest]
Thread overview: 80+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-01 3:41 [Make-wifi-fast] " Dave Taht
2016-05-01 4:46 ` Jonathan Morton
2016-05-01 5:08 ` Ben Greear
2016-05-01 5:23 ` Dave Taht
2016-05-01 14:47 ` dpreed
[not found] ` <CAJq5cE2woA3yb6i_7NLPpxjzvhsVk5uL8BnSTAY7Lp-M0KiPNg@mail.gmail.com>
[not found] ` <CAJq5cE2K0yrz6ALAoKWu23RSJZX9Y_P7Mqcy9ba8e-L3AVhOaA@mail.gmail.com>
2016-05-01 15:51 ` Jonathan Morton
2016-05-02 14:03 ` Roman Yeryomin
2016-05-02 18:40 ` Dave Taht
2016-05-02 20:17 ` [Make-wifi-fast] [Codel] " Isaac Konikoff
2016-05-05 13:55 ` [Make-wifi-fast] " Roman Yeryomin
2016-05-05 14:55 ` Roman Yeryomin
2016-05-02 19:47 ` David Lang
2016-05-01 17:59 ` [Make-wifi-fast] [Codel] " Eric Dumazet
2016-05-01 18:20 ` Jonathan Morton
2016-05-01 18:46 ` Eric Dumazet
2016-05-01 19:55 ` Eric Dumazet
2016-05-02 7:47 ` Jesper Dangaard Brouer
2016-05-01 20:35 ` Jonathan Morton
2016-05-01 20:55 ` Eric Dumazet
2016-05-02 14:18 ` Roman Yeryomin
2016-05-02 15:07 ` Eric Dumazet
2016-05-02 15:43 ` Roman Yeryomin
2016-05-02 16:14 ` Eric Dumazet
2016-05-02 17:08 ` Dave Taht
2016-05-02 17:44 ` Eric Dumazet [this message]
2016-05-05 14:32 ` Roman Yeryomin
2016-05-05 14:53 ` Roman Yeryomin
2016-05-05 15:32 ` Dave Taht
2016-05-05 16:07 ` Roman Yeryomin
2016-05-05 16:59 ` Jonathan Morton
2016-05-05 17:39 ` Roman Yeryomin
2016-05-05 18:16 ` Dave Taht
2016-05-05 18:33 ` Dave Taht
2016-05-05 16:12 ` Eric Dumazet
2016-05-05 16:25 ` Roman Yeryomin
2016-05-05 16:42 ` Roman Yeryomin
2016-05-06 10:55 ` Roman Yeryomin
2016-05-05 19:23 ` Eric Dumazet
2016-05-05 19:41 ` Dave Taht
2016-05-06 8:41 ` moeller0
2016-05-06 11:33 ` Jesper Dangaard Brouer
2016-05-06 11:46 ` moeller0
2016-05-06 13:25 ` Eric Dumazet
2016-05-06 15:25 ` moeller0
2016-05-06 15:58 ` Eric Dumazet
2016-05-06 16:30 ` moeller0
2016-05-06 9:42 ` [Make-wifi-fast] OpenWRT wrong adjustment of fq_codel defaults (Was: [Codel] fq_codel_drop vs a udp flood) Jesper Dangaard Brouer
2016-05-06 12:47 ` Jesper Dangaard Brouer
2016-05-06 18:43 ` Roman Yeryomin
2016-05-06 18:56 ` Roman Yeryomin
2016-05-06 19:43 ` Dave Taht
2016-05-15 22:34 ` Roman Yeryomin
2016-05-15 23:07 ` Eric Dumazet
2016-05-15 23:27 ` Roman Yeryomin
2016-05-16 8:12 ` David Lang
2016-05-16 8:26 ` Roman Yeryomin
2016-05-16 8:46 ` David Lang
2016-05-16 10:34 ` [Make-wifi-fast] [OpenWrt-Devel] " Sebastian Moeller
2016-05-16 8:14 ` [Make-wifi-fast] " Roman Yeryomin
2016-05-16 14:23 ` Eric Dumazet
2016-05-16 16:04 ` Dave Taht
2016-05-16 19:46 ` Roman Yeryomin
2016-05-07 9:57 ` Kevin Darbyshire-Bryant
2016-05-15 22:47 ` Roman Yeryomin
2016-05-03 2:26 ` [Make-wifi-fast] [Codel] fq_codel_drop vs a udp flood Dave Taht
2016-05-03 5:21 ` Dave Taht
2016-05-03 12:39 ` Agarwal, Anil
2016-05-03 12:50 ` Agarwal, Anil
2016-05-03 13:35 ` Eric Dumazet
2016-05-03 15:37 ` Agarwal, Anil
2016-05-03 17:37 ` Dave Taht
2016-05-03 17:54 ` Eric Dumazet
2016-05-03 18:11 ` Dave Taht
2016-05-01 18:26 ` Dave Taht
2016-05-01 22:30 ` Eric Dumazet
2016-05-02 14:09 ` Roman Yeryomin
2016-05-02 15:04 ` Eric Dumazet
2016-05-02 15:42 ` Roman Yeryomin
2016-05-02 13:47 ` [Make-wifi-fast] " Roman Yeryomin
2016-05-02 15:01 ` Eric Dumazet
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