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Re: [tsvwg] Neal Cardwell's rationale for supporting ECT(1) as an input/L4S signal

Jeremy Harris <jgh@wizmail.org> Tue, 12 May 2020 20:38 UTC

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To: Neal Cardwell <ncardwell@google.com>, Jonathan Morton <chromatix99@gmail.com>
Cc: tsvwg IETF list <tsvwg@ietf.org>
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From: Jeremy Harris <jgh@wizmail.org>
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Date: Tue, 12 May 2020 21:38:38 +0100
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Subject: Re: [tsvwg] Neal Cardwell's rationale for supporting ECT(1) as an input/L4S signal
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On 12/05/2020 21:29, Neal Cardwell wrote:
> On Fri, May 8, 2020 at 1:54 PM Jonathan Morton <chromatix99@gmail.com> wrote:
>> The shallow queues referred to are intended for deployment in tightly
>> controlled datacentre environments, where the typical path RTT is measured in
>> microseconds rather than milliseconds. It would not be surprising if a
>> transport passing through such a queue as part of a typical Internet path of
>> many milliseconds experienced poor utilisation.
> 
> I think the issue is that such paths do not currently suffer from
> throughput problems, but could if they attempt to participate in an
> SCE conversation.

They would if they tried to participate in a plain 3168 conversation,
right?  I don't see you can dislike SCE for that.

How does it behave for L4S, without changing the datacentre hardware?
-- 
Cheers,
  Jeremy

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