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Re: [quicwg/base-drafts] Reset min_rtt on persistent congestion (#3927)

Kazuho Oku <notifications@github.com> Thu, 23 July 2020 05:00 UTC

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Date: Wed, 22 Jul 2020 22:00:26 -0700
From: Kazuho Oku <notifications@github.com>
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Subject: Re: [quicwg/base-drafts] Reset min_rtt on persistent congestion (#3927)
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On one hand I agree that we can expect to see immediate ACKs, especially when HTTP/3 is used.

At the same time, I am not sure if resetting min_rtt when observing persistent congestion is better than other cases where we might reset min_rtt, but that we do not currently mention.

Change of IP_TTL could be one of the examples in this regard (IIRC @larseggert pointed out that we do not use that value for detecting path changes).

To summarize, I think talking about resetting min_rtt might be fine, though I am not sure if that discussion should be tied to persistent congestion.

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