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From: Neil Davies <neil.davies@pnsol.com>
To: Dave Taht <dave.taht@gmail.com>
Cc: bloat@lists.bufferbloat.net
Subject: Re: [Bloat] Best practices for paced TCP on Linux?
Date: Sat, 7 Apr 2012 21:27:27 +0100	[thread overview]
Message-ID: <2442E8BD-D0B1-4403-AB30-57FC536A34C5@pnsol.com> (raw)
In-Reply-To: <CAA93jw57DXSVOtz_Z6b85iSu0a9q67LGhgpHX+YPPxo2oGQWHg@mail.gmail.com>

Fred

thinking on this more the 'g' (the function of RTT) is something like 'min' - on the assumption that the path doesn't change during the transfer - that represents the immutable part of the end-to-end delay, the 'inflight' buffering.

Neil

On 7 Apr 2012, at 16:25, Dave Taht wrote:

> The test HD tcp stream is up at
> 
> http://cesur.tg12.gathering.org:9094/
> 
> on both ipv6 and ipv4. They are streaming anywhere up to 1000 users,
> and there is an astounding amount of ipv6 present - 73% of the room
> has an ipv6 address.
> 
> I took some captures from california last night, they were
> interesting. I think a few more captures would also be interesting.
> 
> One indicated throttling at the isp at t+60 seconds, the others showed
> stuff dropping out for large periods of time. (170ms rtt here!)
> 
> I'd like to look into what percentage of the failures I observed
> happened on the wifi hop vs the ethernet gateway
> since then many changes where made, and I'm low on sleep. (what do
> geeks do on a friday night?)
> 
> I don't know if they are still trying sfqred or qfq in production -
> they worked! - but had little effect (as is to be kind of expected
> with the instantaneous queue length being so short and bandwidth so
> high on their first and nearest hops....)
> On Sat, Apr 7, 2012 at 8:08 AM, Eric Dumazet <eric.dumazet@gmail.com> wrote:
>> Le samedi 07 avril 2012 à 00:21 +0200, Steinar H. Gunderson a écrit :
>> 
>>> I'll be perfectly happy just doing _something_; I don't need a perfect
>>> solution. We have one more night of streaming, and then the event is over. :-)
> 
> 
> -- 
> Dave Täht
> SKYPE: davetaht
> US Tel: 1-239-829-5608
> http://www.bufferbloat.net
> _______________________________________________
> Bloat mailing list
> Bloat@lists.bufferbloat.net
> https://lists.bufferbloat.net/listinfo/bloat


  parent reply	other threads:[~2012-04-07 20:27 UTC|newest]

Thread overview: 38+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-04-06 21:37 Steinar H. Gunderson
2012-04-06 21:49 ` Dave Taht
2012-04-06 22:21   ` Steinar H. Gunderson
2012-04-07 15:08     ` Eric Dumazet
2012-04-07 15:25       ` Dave Taht
2012-04-07 15:35         ` Steinar H. Gunderson
2012-04-07 15:48           ` Dave Taht
2012-04-07 15:52           ` Dave Taht
2012-04-07 17:10           ` Jonathan Morton
2012-04-07 17:18             ` Dave Taht
2012-04-07 17:44               ` Jonathan Morton
2012-04-07 18:10             ` Steinar H. Gunderson
2012-04-07 18:27               ` Jonathan Morton
2012-04-07 18:56                 ` Dave Taht
2012-04-07 18:50               ` Dave Taht
2012-04-07 18:54                 ` Steinar H. Gunderson
2012-04-07 19:01                   ` Steinar H. Gunderson
2012-04-07 19:08                     ` Jonathan Morton
2012-04-07 19:38                     ` Dave Taht
2012-04-07 20:16                       ` Steinar H. Gunderson
2012-04-14  0:37                       ` Rick Jones
2012-04-07 21:13                     ` Jesper Dangaard Brouer
2012-04-07 21:31                       ` Steinar H. Gunderson
2012-04-07 19:02                   ` Dave Taht
2012-04-07 21:49                 ` Fred Baker
2012-04-07 22:36                   ` Dave Taht
2012-04-07 23:59                     ` Fred Baker
2012-04-07 20:27         ` Neil Davies [this message]
2012-04-14  0:35     ` Rick Jones
2012-04-14 21:06       ` Roger Jørgensen
2012-04-16 17:05         ` Rick Jones
2012-04-07 11:54 ` Neil Davies
2012-04-07 14:17   ` Fred Baker
2012-04-07 15:08     ` Neil Davies
2012-04-07 15:16       ` Steinar H. Gunderson
2012-04-14  0:44     ` Rick Jones
2012-04-07 14:48   ` Dave Taht
2012-05-12 20:08 ` Steinar H. Gunderson

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