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From: David Lang <david@lang.hm>
To: "Toke Høiland-Jørgensen" <toke@toke.dk>
Cc: Pete Heist <pete@eventide.io>, make-wifi-fast@lists.bufferbloat.net
Subject: Re: [Make-wifi-fast] mesh deployment with ath9k driver changes
Date: Wed, 25 Apr 2018 17:38:31 -0700 (PDT)	[thread overview]
Message-ID: <alpine.DEB.2.02.1804251736050.12043@nftneq.ynat.uz> (raw)
In-Reply-To: <878t9c70jd.fsf@toke.dk>

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On Tue, 24 Apr 2018, Toke Høiland-Jørgensen wrote:

> Pete Heist <pete@eventide.io> writes:
>
>>> On Apr 24, 2018, at 4:34 PM, Toke Høiland-Jørgensen <toke@toke.dk> wrote:
>>> 
>>> Not sure. You do get HOL blocking while a packet is retried, basically.
>>> And ath9k will keep trying way after it should have given up (up to 30
>>> retries per packet). If you combine this with a lot of backoff for each
>>> transmission (which is also quite likely in a very congested setting),
>>> and I suppose it might be possible…
>>
>> So that means everyone else waits while a packet is sent and re-sent
>> to a station with a weak signal, for example? I see how that would
>> wreck the latency pretty quick with the number of stations connected,
>> plus channel contention with another repeater. It may be a much bigger
>> factor than bloat.
>
> Yup, exactly...

https://www.usenix.org/publications/login/april-2013-volume-38-number-2/wireless-means-radio
https://www.usenix.org/conference/lisa12/technical-sessions/presentation/lang_david_wireless
http://lang.hm/talks/topics/Wireless/Cascadia_2012/ (apologies for never 
cleaning this up to one set of good audio/video and slides)

can you make a map of how well each AP hears every other AP? (iw scan on each 
device in turn to report the signal strength of the others)

  parent reply	other threads:[~2018-04-26  0:38 UTC|newest]

Thread overview: 56+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-24  8:33 Pete Heist
2018-04-24 11:54 ` Toke Høiland-Jørgensen
2018-04-24 13:37   ` Pete Heist
2018-04-24 13:51     ` Toke Høiland-Jørgensen
2018-04-24 14:09       ` Pete Heist
2018-04-24 14:34         ` Toke Høiland-Jørgensen
2018-04-24 19:10           ` Pete Heist
2018-04-24 21:32             ` Toke Høiland-Jørgensen
2018-04-25  6:05               ` Pete Heist
2018-04-25  6:36                 ` Sebastian Moeller
2018-04-25 17:17                   ` Pete Heist
2018-04-26  0:41                 ` David Lang
2018-04-26 19:40                   ` Pete Heist
2018-04-26  0:38               ` David Lang [this message]
2018-04-26 21:41                 ` Pete Heist
2018-04-26 21:44                   ` Sebastian Moeller
2018-04-26 21:56                     ` Pete Heist
2018-04-26 22:04                       ` David Lang
2018-04-26 22:47                         ` Pete Heist
2018-04-27 10:15                           ` Toke Høiland-Jørgensen
2018-04-27 10:32                             ` Pete Heist
2018-04-26  0:35       ` David Lang
2018-04-27 11:42 ` Valent Turkovic
2018-04-27 11:50   ` Pete Heist
2018-04-27 11:59     ` Valent Turkovic
2018-04-27 12:17       ` Pete Heist
2018-04-27 11:47 ` Valent Turkovic
2018-04-27 12:00   ` Pete Heist
2018-05-19 16:03 bkil
2018-05-20 18:56 ` Pete Heist
2018-05-31  0:52 ` David Lang
2018-06-08  9:37   ` Pete Heist
2018-06-09 15:32     ` bkil
2018-06-13 13:07       ` Pete Heist
2018-06-13 13:24         ` Toke Høiland-Jørgensen
2018-06-13 16:01           ` Pete Heist
2018-06-30 19:14             ` bkil
2018-07-04 21:47               ` Pete Heist
2018-07-05 13:08                 ` Toke Høiland-Jørgensen
2018-07-05 17:26                   ` Pete Heist
2018-07-05 17:37                     ` Toke Høiland-Jørgensen
2018-07-05 18:02                       ` Pete Heist
2018-07-05 20:17                         ` Jonathan Morton
2018-07-09  2:20                           ` Aaron Wood
2018-07-09  5:17                             ` Jonathan Morton
2018-07-09  6:27                               ` Pete Heist
2018-07-09 12:55                                 ` Sebastian Moeller
2018-07-09 23:21                                   ` Pete Heist
2018-07-09  5:13                 ` David Lang
2018-07-09 23:33               ` Pete Heist
2018-07-10  0:39                 ` Pete Heist
2018-07-10  7:02                   ` bkil
2018-06-13 16:30           ` Sebastian Moeller
2018-06-13 17:50             ` Toke Høiland-Jørgensen
     [not found]       ` <CADuVhRWL2aVjzjfLHg1nPFa8Ae-hWrGrE7Wga4eUKon3oqoTXA@mail.gmail.com>
2018-06-30 19:26         ` bkil
2018-06-30 20:04           ` Jannie Hanekom

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