From: Eric Dumazet <eric.dumazet@gmail.com>
To: "Dave Täht" <dave.taht@bufferbloat.net>
Cc: codel@lists.bufferbloat.net
Subject: Re: [Codel] [RFC PATCH] codel: ecn mark at target
Date: Sat, 04 Aug 2012 08:45:38 +0200 [thread overview]
Message-ID: <1344062738.9299.1453.camel@edumazet-glaptop> (raw)
In-Reply-To: <1344048299-26267-1-git-send-email-dave.taht@bufferbloat.net>
On Fri, 2012-08-03 at 19:44 -0700, Dave Täht wrote:
> From: Dave Taht <dave.taht@bufferbloat.net>
>
> The consensus at ietf was that ecn marking should start at
> target, and then the results fed into the codel drop scheduler.
>
> While I agree with the latter, I feel that waiting an interval
> before starting to mark will be more in-tune with the concept
> of a sojourn time, and lead to better utilization.
>
> As I am outnumbered and outgunned, do it at target.
Well, thats a huge way to favor non ECN flows against ECN flows.
Marking _all_ ECN enabled packets just because last packet sent had a
sojourn time above target is going to throttle ECN flows and let non ECN
flows going full speed and take whole bandwidth.
Doing so is a nice way to keep users switching to ECN one day.
IETF could just say : ECN is doomed, forget about it, dont even try.
next prev parent reply other threads:[~2012-08-04 6:45 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-04 2:44 Dave Täht
2012-08-04 6:45 ` Eric Dumazet [this message]
2012-08-04 21:53 ` Kathleen Nichols
2012-08-05 3:06 ` Andrew McGregor
2012-08-05 5:30 ` Eric Dumazet
2012-08-05 16:53 ` Andrew McGregor
2012-08-05 16:58 ` Kathleen Nichols
2012-08-05 17:14 ` Andrew McGregor
2012-08-05 17:15 ` Eric Dumazet
2012-08-05 16:54 ` Richard Scheffenegger
2012-08-05 17:25 ` Eric Dumazet
2012-08-05 17:35 ` Eric Dumazet
2012-08-05 18:14 ` Yuchung Cheng
2012-08-05 18:40 ` Eric Dumazet
2012-08-05 19:49 ` Eric Dumazet
2012-08-06 16:22 ` Richard Scheffenegger
2012-08-06 16:46 ` Eric Dumazet
2012-08-06 17:50 ` Dave Taht
2012-08-06 19:09 ` Andrew McGregor
2012-08-06 20:01 ` Eric Dumazet
2012-08-10 17:48 ` Dave Taht
2012-08-04 7:00 ` Roger Jørgensen
2012-08-04 13:38 ` Richard Scheffenegger
2012-08-04 17:21 ` Eric Dumazet
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