From: Eric Dumazet <eric.dumazet@gmail.com>
To: "Steinar H. Gunderson" <sgunderson@bigfoot.com>
Cc: bloat@lists.bufferbloat.net
Subject: Re: [Bloat] [Codel] The challenge
Date: Thu, 10 May 2012 02:16:31 +0200 [thread overview]
Message-ID: <1336608991.12504.123.camel@edumazet-glaptop> (raw)
In-Reply-To: <20120510000854.GB8131@uio.no>
On Thu, 2012-05-10 at 02:08 +0200, Steinar H. Gunderson wrote:
> On Thu, May 10, 2012 at 01:58:39AM +0200, Eric Dumazet wrote:
> > One solution is at the producer level (TCP stack of the sender in this
> > case) to properly pace the transmits in MSS units given the RTT and
> > cwnd, supposedly done with TCP Hybla.
>
> FWIW, I gave Hybla a quick test (echo hybla > /proc/sys/net/ipv4/tcp_congestion_control
> and then start a VLC server; Linux 3.3.4 on both sides), and it doesn't pace
> for me. It happily sends packets at what appears to be line speed, even to a
> host ~100ms away on a much slower line.
You should carefuly read http://hybla.deis.unibo.it/
Linux implementation
Starting from kernel 2.6.13 Hybla has been included in the official
Linux kernel. However, this implementation, based on the "module" Linux
technology, does not include the last two Hybla components: Hoe's
channel bandwidth estimate and packet spacing. Their addition is
mandatory to fully benefit from Hybla performance improvement. To this
end, it is enough to patch the official kernel with the MultiTCP
package, downloadable from the downloads section.
next prev parent reply other threads:[~2012-05-10 0:16 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-09 1:04 [Bloat] " Dave Taht
2012-05-09 2:02 ` Kevin Gross
2012-05-09 5:16 ` Simon Barber
2012-05-09 5:40 ` Eric Dumazet
2012-05-09 5:41 ` Dave Taht
2012-05-09 7:32 ` [Bloat] [codel] some numbers on dual 10Gb links Eric Dumazet
2012-05-09 13:04 ` [Bloat] The challenge Kevin Gross
2012-05-16 5:55 ` Jonathan Morton
2012-05-16 6:09 ` Eric Dumazet
2012-05-16 7:05 ` [Bloat] Exploring the potential of codel, fq_codel, and qfq dave taht
2012-05-16 7:20 ` Dave Taht
2012-05-16 7:42 ` Eric Dumazet
2012-05-16 7:46 ` Eric Dumazet
2012-05-16 8:17 ` Eric Dumazet
2012-05-16 9:02 ` Jonathan Morton
2012-05-16 9:14 ` Eric Dumazet
2012-05-16 9:31 ` Jonathan Morton
2012-05-16 9:37 ` Eric Dumazet
2012-05-16 9:59 ` Jonathan Morton
2012-05-16 10:10 ` Eric Dumazet
2012-05-16 13:58 ` Eric Dumazet
2012-05-16 17:40 ` [Bloat] [Codel] " Rick Jones
2012-05-16 17:53 ` Eric Dumazet
2012-05-16 17:33 ` Rick Jones
2012-05-16 17:48 ` Eric Dumazet
2012-05-16 6:09 ` [Bloat] The challenge Dave Taht
2012-05-16 6:31 ` [Bloat] [Codel] " Eric Dumazet
2012-05-16 8:15 ` Jonathan Morton
2012-05-09 19:10 ` [Bloat] " Roger Jørgensen
2012-05-09 19:15 ` Dave Taht
2012-05-09 19:28 ` Dave Taht
2012-05-09 20:02 ` Simon Barber
2012-05-09 20:06 ` Fred Baker
2012-05-09 21:47 ` Jim Gettys
2012-05-09 23:58 ` [Bloat] [Codel] " Eric Dumazet
2012-05-10 0:02 ` Steinar H. Gunderson
2012-05-10 0:08 ` Eric Dumazet
2012-05-10 0:08 ` Steinar H. Gunderson
2012-05-10 0:16 ` Eric Dumazet [this message]
2012-05-10 9:19 ` Steinar H. Gunderson
2012-05-10 9:27 ` Eric Dumazet
2012-05-10 9:38 ` Steinar H. Gunderson
2012-05-10 2:34 ` [Bloat] " Jonathan Morton
2012-05-10 2:37 ` Dave Taht
2012-05-10 6:35 ` David Woodhouse
2012-05-10 6:54 ` Jonathan Morton
2012-05-10 7:02 ` David Woodhouse
2012-05-10 14:25 ` Justin McCann
2012-05-10 14:42 ` David Woodhouse
2012-05-10 15:34 ` Neil Davies
2012-05-10 21:20 ` [Bloat] [Codel] " Jim Gettys
2012-05-14 7:27 ` [Bloat] " Jonathan Morton
2012-05-14 7:34 ` [Bloat] [Codel] " Eric Dumazet
2012-05-14 13:55 ` [Bloat] " David Woodhouse
2012-05-18 20:56 ` [Bloat] Linux-able modems Jonathan Morton
2012-05-18 21:36 ` Dave Taht
2012-05-18 22:34 ` Dave Taht
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