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perf(http2): reduce adaptive window pings as the BDP stabilizes #2550

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merged 1 commit into from May 18, 2021

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This introduces a delay to sending a ping to calculate the BDP that
becomes shorter as the BDP is changing, to improve throughput quickly,
but then also becomes longer as the BDP stabilizes, to reduce the amount
of pings sent. This improved the performance of the adaptive window
end_to_end benchmark.

It should also reduce the amount of pings the remote has to deal with,
hopefully preventing hyper from triggering ENHANCE_YOUR_CALM errors.

cc #2526

@seanmonstar seanmonstar requested a review from nox May 15, 2021 01:55
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Looks nice, just one nit.

src/proto/h2/ping.rs Show resolved Hide resolved
This introduces a delay to sending a ping to calculate the BDP that
becomes shorter as the BDP is changing, to improve throughput quickly,
but then also becomes longer as the BDP stabilizes, to reduce the amount
of pings sent. This improved the performance of the adaptive window
end_to_end benchmark.

It should also reduce the amount of pings the remote has to deal with,
hopefully preventing hyper from triggering ENHANCE_YOUR_CALM errors.
@seanmonstar seanmonstar force-pushed the http2-adaptive-slow-pings-when-stable branch from 64c7bee to a723ff7 Compare May 18, 2021 20:29
@seanmonstar seanmonstar merged commit 4cd06bf into master May 18, 2021
@seanmonstar seanmonstar deleted the http2-adaptive-slow-pings-when-stable branch May 18, 2021 21:12
BenxiangGe pushed a commit to BenxiangGe/hyper that referenced this pull request Jul 26, 2021
…um#2550)

This introduces a delay to sending a ping to calculate the BDP that
becomes shorter as the BDP is changing, to improve throughput quickly,
but then also becomes longer as the BDP stabilizes, to reduce the amount
of pings sent. This improved the performance of the adaptive window
end_to_end benchmark.

It should also reduce the amount of pings the remote has to deal with,
hopefully preventing hyper from triggering ENHANCE_YOUR_CALM errors.
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2 participants