Re: [TLS] Efficiency of ACKing scheme

Thomas Fossati <Thomas.Fossati@arm.com> Mon, 06 April 2020 12:19 UTC

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From: Thomas Fossati <Thomas.Fossati@arm.com>
To: Hanno Becker <Hanno.Becker@arm.com>, Martin Thomson <mt@lowentropy.net>, "tls@ietf.org" <tls@ietf.org>
Thread-Topic: [TLS] Efficiency of ACKing scheme
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Date: Mon, 06 Apr 2020 12:18:47 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/tls/F5rOK2JfIsct5Ta83bQIGWz2NqI>
Subject: Re: [TLS] Efficiency of ACKing scheme
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Hi Hanno,

On 06/04/2020, 12:19, "Hanno Becker" <Hanno.Becker@arm.com> wrote:
> Thus, in a nutshell, leaving the question of whether ACKs should be
> buffered or not on the receiver to the implementor, leads to
> interoperability issues.

I'm not sure this strictly qualifies as an interop issue.

At a subtle level it is, in the sense that the signals coming from one
side don't the same exact semantics when observed from the peer point of
view, but that doesn't result in an interop problem at the macro level.
It does make the reliability scheme suboptimal and maybe even grossly
inefficient in some cases and may have disruptive potential on the
network, agreed.  But the overall "lost in translation" effect depends
greatly on the resources available to the endpoints as well as the
network path rather than the inner logics of the ACKing scheme.

cheers

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