Re: [quicwg/base-drafts] Ack delays are adjusted by ack_delay_exponent (#3362)
Martin Thomson <notifications@github.com> Mon, 20 January 2020 06:03 UTC
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Subject: Re: [quicwg/base-drafts] Ack delays are adjusted by ack_delay_exponent (#3362)
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martinthomson commented on this pull request. > @@ -315,14 +315,16 @@ samples, and rttvar is the variation in the RTT samples, estimated using a mean variation. The calculation of smoothed_rtt uses path latency after adjusting RTT samples -for ACK delays. For packets sent in the ApplicationData packet number space, -a peer limits any delay in sending an acknowledgement for an ack-eliciting -packet to no greater than the value it advertised in the max_ack_delay transport -parameter. Consequently, when a peer reports an Ack Delay that is greater than -its max_ack_delay, the delay is attributed to reasons out of the peer's control, -such as scheduler latency at the peer or loss of previous ACK frames. Any -delays beyond the peer's max_ack_delay are therefore considered effectively -part of path delay and incorporated into the smoothed_rtt estimate. +for ACK delays. ACK delays are communicated in the ACK frame as an ack_delay +field right shiften by the ack_delay_exponent transport parameter. For packets ```suggestion field left shifted by the ack_delay_exponent transport parameter. For packets ``` I know that shifting and endianness are often contended, but I think that this is a left shift. -- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: https://github.com/quicwg/base-drafts/pull/3362#pullrequestreview-345092840
- [quicwg/base-drafts] Ack delays are adjusted by a… ianswett
- Re: [quicwg/base-drafts] Ack delays are adjusted … Martin Thomson
- Re: [quicwg/base-drafts] Ack delays are adjusted … Kazuho Oku
- Re: [quicwg/base-drafts] Ack delays are adjusted … Martin Thomson
- Re: [quicwg/base-drafts] Ack delays are adjusted … ianswett
- Re: [quicwg/base-drafts] Ack delays are adjusted … ianswett
- Re: [quicwg/base-drafts] Ack delays are adjusted … ianswett
- Re: [quicwg/base-drafts] Ack delays are adjusted … ianswett
- Re: [quicwg/base-drafts] Ack delays are adjusted … Kazuho Oku
- Re: [quicwg/base-drafts] Ack delays are adjusted … Jana Iyengar
- Re: [quicwg/base-drafts] Ack delays are adjusted … ianswett
- Re: [quicwg/base-drafts] Ack delays are adjusted … ianswett
- Re: [quicwg/base-drafts] Ack delays are adjusted … Martin Thomson
- Re: [quicwg/base-drafts] Ack delays are adjusted … ianswett
- Re: [quicwg/base-drafts] Ack delays are adjusted … martinduke