Re: [quicwg/base-drafts] compensation of ack_delay is fragile against errors (#2060)

janaiyengar <> Fri, 07 December 2018 01:04 UTC

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Subject: Re: [quicwg/base-drafts] compensation of ack_delay is fragile against errors (#2060)
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@ianswett : Sorry, I was referring to a mis-reporting receiver in the case that the min_rtt is known.

In the case you mention, yes, that is a potential condition where a sender might have poor performance too, but I imagine this is not something we would expect to happen for very long, especially given all the handshake packets should be acked immediately.  Using a 1ms timer means for immediate means that's just a part of the min_rtt... nothing a sender can do about that. 

Basically, I don't think optimistically compensating at the sender for receiver delays is the way to go.  If the RTT sample seems broken, I would argue it should be ignored.

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