From: Jonathan Morton <chromatix99@gmail.com>
To: jb <justin@dslr.net>
Cc: bloat <bloat@lists.bufferbloat.net>
Subject: Re: [Bloat] DSLReports Speed Test has latency measurement built-in
Date: Thu, 7 May 2015 10:18:23 +0300 [thread overview]
Message-ID: <CAJq5cE09gB5vaspA2oahLL5+pLazy+SNvSr9R0f5wKbRFva6wg@mail.gmail.com> (raw)
In-Reply-To: <CAH3Ss97MUPRHbGVUD6K_7z5hUausyTv4gzPgFQREYDdPgMvJ6w@mail.gmail.com>
[-- Attachment #1: Type: text/plain, Size: 745 bytes --]
It may depend on the application's tolerance to packet loss. A packet
delayed further than the jitter buffer's tolerance counts as lost, so *IF*
jitter is randomly distributed, jitter can be traded off against loss. For
those purposes, standard deviation may be a valid metric.
However the more common characteristic is that delay is sometimes low (link
idle) and sometimes high (buffer full) and rarely in between. In other
words, delay samples are not statistically independent; loss due to jitter
is bursty, and real-time applications like VoIP can't cope with that. For
that reason, and due to your low temporal sampling rate, you should take
the peak delay observed under load and compare it to the average during
idle.
- Jonathan Morton
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next prev parent reply other threads:[~2015-05-07 7:18 UTC|newest]
Thread overview: 183+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-19 5:26 jb
2015-04-19 7:36 ` David Lang
2015-04-19 7:48 ` David Lang
2015-04-19 9:33 ` jb
2015-04-19 10:45 ` David Lang
2015-04-19 8:28 ` Alex Burr
2015-04-19 10:20 ` Sebastian Moeller
2015-04-19 10:46 ` Jonathan Morton
2015-04-19 16:30 ` Sebastian Moeller
2015-04-19 17:41 ` Jonathan Morton
2015-04-19 19:40 ` Sebastian Moeller
2015-04-19 20:53 ` Jonathan Morton
2015-04-21 2:56 ` Simon Barber
2015-04-21 4:15 ` jb
2015-04-21 4:47 ` David Lang
2015-04-21 7:35 ` jb
2015-04-21 9:14 ` Steinar H. Gunderson
2015-04-21 14:20 ` David Lang
2015-04-21 14:25 ` David Lang
2015-04-21 14:28 ` David Lang
2015-04-21 22:13 ` jb
2015-04-21 22:39 ` Aaron Wood
2015-04-21 23:17 ` jb
2015-04-22 2:14 ` Simon Barber
2015-04-22 2:56 ` jb
2015-04-22 14:32 ` Simon Barber
2015-04-22 17:35 ` David Lang
2015-04-23 1:37 ` Simon Barber
2015-04-24 16:54 ` David Lang
2015-04-24 17:00 ` Rick Jones
2015-04-21 9:37 ` Jonathan Morton
2015-04-21 10:35 ` jb
2015-04-22 4:04 ` Steinar H. Gunderson
2015-04-22 4:28 ` Eric Dumazet
2015-04-22 8:51 ` [Bloat] RE : " luca.muscariello
2015-04-22 12:02 ` jb
2015-04-22 13:08 ` Jonathan Morton
[not found] ` <14ce17a7810.27f7.e972a4f4d859b00521b2b659602cb2f9@superduper.net>
2015-04-22 14:15 ` Simon Barber
2015-04-22 13:50 ` [Bloat] " Eric Dumazet
2015-04-22 14:09 ` Steinar H. Gunderson
2015-04-22 15:26 ` [Bloat] RE : " luca.muscariello
2015-04-22 15:44 ` [Bloat] " Eric Dumazet
2015-04-22 16:35 ` MUSCARIELLO Luca IMT/OLN
2015-04-22 17:16 ` Eric Dumazet
2015-04-22 17:24 ` Steinar H. Gunderson
2015-04-22 17:28 ` MUSCARIELLO Luca IMT/OLN
2015-04-22 17:45 ` MUSCARIELLO Luca IMT/OLN
2015-04-23 5:27 ` MUSCARIELLO Luca IMT/OLN
2015-04-23 6:48 ` Eric Dumazet
[not found] ` <CAH3Ss96VwE_fWNMOMOY4AgaEnVFtCP3rPDHSudOcHxckSDNMqQ@mail.gmail.com>
2015-04-23 10:08 ` jb
2015-04-24 8:18 ` Sebastian Moeller
2015-04-24 8:29 ` Toke Høiland-Jørgensen
2015-04-24 8:55 ` Sebastian Moeller
2015-04-24 9:02 ` Toke Høiland-Jørgensen
2015-04-24 13:32 ` jb
2015-04-24 13:58 ` Toke Høiland-Jørgensen
2015-04-24 16:51 ` David Lang
2015-04-25 3:15 ` Simon Barber
2015-04-25 4:04 ` Dave Taht
2015-04-25 4:26 ` Simon Barber
2015-04-25 6:03 ` Sebastian Moeller
2015-04-27 16:39 ` Dave Taht
2015-04-28 7:18 ` Sebastian Moeller
2015-04-28 8:01 ` David Lang
2015-04-28 8:19 ` Toke Høiland-Jørgensen
2015-04-28 15:42 ` David Lang
2015-04-28 8:38 ` Sebastian Moeller
2015-04-28 12:09 ` Rich Brown
2015-04-28 15:26 ` David Lang
2015-04-28 15:39 ` David Lang
2015-04-28 11:04 ` Mikael Abrahamsson
2015-04-28 11:49 ` Sebastian Moeller
2015-04-28 12:24 ` Mikael Abrahamsson
2015-04-28 13:44 ` Sebastian Moeller
2015-04-28 19:09 ` Rick Jones
2015-04-28 14:06 ` Dave Taht
2015-04-28 14:02 ` Dave Taht
2015-05-06 5:08 ` Simon Barber
2015-05-06 8:50 ` Sebastian Moeller
2015-05-06 15:30 ` Jim Gettys
2015-05-06 18:03 ` Sebastian Moeller
2015-05-06 20:25 ` Jonathan Morton
2015-05-06 20:43 ` Toke Høiland-Jørgensen
2015-05-07 7:33 ` Sebastian Moeller
2015-05-07 4:29 ` Mikael Abrahamsson
2015-05-07 7:08 ` jb
2015-05-07 7:18 ` Jonathan Morton [this message]
2015-05-07 7:24 ` Mikael Abrahamsson
2015-05-07 7:40 ` Sebastian Moeller
2015-05-07 9:16 ` Mikael Abrahamsson
2015-05-07 10:44 ` jb
2015-05-07 11:36 ` Sebastian Moeller
2015-05-07 11:44 ` Mikael Abrahamsson
2015-05-07 13:10 ` Jim Gettys
2015-05-07 13:18 ` Mikael Abrahamsson
2015-05-07 13:14 ` jb
2015-05-07 13:26 ` Neil Davies
2015-05-07 14:45 ` Simon Barber
2015-05-07 22:27 ` Dave Taht
2015-05-07 22:45 ` Dave Taht
2015-05-07 23:09 ` Dave Taht
2015-05-08 2:05 ` jb
2015-05-08 4:16 ` David Lang
2015-05-08 3:54 ` Eric Dumazet
2015-05-08 4:20 ` Dave Taht
2015-05-08 13:20 ` [Bloat] DSLReports Jitter/PDV test Rich Brown
2015-05-08 14:22 ` jb
2015-05-07 7:37 ` [Bloat] DSLReports Speed Test has latency measurement built-in Sebastian Moeller
2015-05-07 7:19 ` Mikael Abrahamsson
2015-05-07 6:19 ` Sebastian Moeller
2015-04-25 3:23 ` Simon Barber
2015-04-24 15:20 ` Bill Ver Steeg (versteb)
2015-04-25 2:24 ` Simon Barber
2015-04-23 10:17 ` renaud sallantin
2015-04-23 14:10 ` Eric Dumazet
2015-04-23 14:38 ` renaud sallantin
2015-04-23 15:52 ` Jonathan Morton
2015-04-23 16:00 ` Simon Barber
2015-04-23 13:17 ` MUSCARIELLO Luca IMT/OLN
2015-04-22 18:22 ` Eric Dumazet
2015-04-22 18:39 ` [Bloat] Pacing --- was " MUSCARIELLO Luca IMT/OLN
2015-04-22 19:05 ` Jonathan Morton
2015-04-22 15:59 ` [Bloat] RE : " Steinar H. Gunderson
2015-04-22 16:16 ` Eric Dumazet
2015-04-22 16:19 ` Dave Taht
2015-04-22 17:15 ` Rick Jones
2015-04-19 12:14 ` [Bloat] " Toke Høiland-Jørgensen
-- strict thread matches above, loose matches on Subject: below --
2015-04-19 12:56 jb
2015-04-19 13:10 ` Toke Høiland-Jørgensen
2015-04-19 13:53 ` jb
2015-04-19 15:38 ` Toke Høiland-Jørgensen
2015-04-19 16:38 ` Toke Høiland-Jørgensen
2015-04-19 17:15 ` Mikael Abrahamsson
2015-04-19 17:43 ` Dave Taht
2015-04-19 19:22 ` Dave Taht
2015-04-23 17:03 ` Dave Taht
2015-04-23 18:04 ` Mikael Abrahamsson
2015-04-23 18:08 ` Jonathan Morton
2015-04-23 20:19 ` jb
2015-04-23 20:39 ` Dave Taht
2015-04-24 21:45 ` Rich Brown
2015-04-25 1:14 ` jb
2015-04-23 21:44 ` Rich Brown
2015-04-23 22:22 ` Dave Taht
2015-04-23 22:29 ` Dave Taht
2015-04-24 1:58 ` Rich Brown
2015-04-24 2:40 ` Dave Taht
2015-04-24 3:20 ` Jim Gettys
2015-04-24 3:39 ` Dave Taht
2015-04-24 4:04 ` Dave Taht
2015-04-24 4:17 ` Dave Taht
2015-04-24 16:13 ` Rick Jones
2015-04-24 5:00 ` jb
2015-04-27 16:28 ` Dave Taht
2015-04-24 16:09 ` Rick Jones
2015-04-24 13:49 ` Pedro Tumusok
2015-04-23 22:51 ` David Lang
2015-04-24 1:38 ` Rich Brown
2015-04-24 4:16 ` Mikael Abrahamsson
2015-04-24 4:24 ` Dave Taht
2015-04-19 17:45 ` Toke Høiland-Jørgensen
2015-04-19 18:26 ` Jonathan Morton
2015-04-19 18:30 ` Toke Høiland-Jørgensen
2015-04-19 19:15 ` Jonathan Morton
2015-04-20 3:15 ` Aaron Wood
2015-04-20 7:00 ` jb
[not found] ` <CACQiMXbF9Uk3H=81at-Z9a2fdYKrRtRorSXRg5dBcPB8-aR4Cw@mail.gmail.com>
2015-04-20 8:11 ` jb
2015-04-19 19:19 ` Mikael Abrahamsson
2015-04-19 21:57 ` Rich Brown
2015-04-19 23:21 ` jb
2015-04-20 14:51 ` David Lang
2015-04-20 15:51 ` Dave Taht
2015-04-20 16:15 ` Dave Taht
2015-04-19 0:57 Rich Brown
2015-04-19 4:01 ` Dave Taht
2015-04-20 14:33 ` Colin Dearborn
2015-04-19 8:29 ` Dave Taht
2015-04-19 8:38 ` Dave Taht
2015-04-19 12:21 ` jb
2015-04-19 9:17 ` MUSCARIELLO Luca IMT/OLN
2015-04-19 12:03 ` jb
2015-04-19 10:53 ` dikshie
2015-04-19 12:11 ` jb
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