From: Dave Taht <dave.taht@gmail.com>
To: Make-Wifi-fast <make-wifi-fast@lists.bufferbloat.net>
Cc: shawnzhu@umich.edu, zmao@umich.edu
Subject: [Make-wifi-fast] 30+ sec of miserable bufferbloat in wearOS
Date: Sun, 7 Apr 2019 02:13:56 +0200 [thread overview]
Message-ID: <CAA93jw4b87=Yca9gnF=XvsTegusN+a=hW4p8qCPs0mMh3Mo2Ag@mail.gmail.com> (raw)
"When acting as a gateway proxy for a wearable, the phone dramatically
inflates the end-to-end (server to wearable) latency to 30+ seconds
due to its incurred “bufferbloat”. We then break down the end-to-end
latency into various components, and identify the root cause to be the
phone-side TCP receive buffer, whose configuration does not take into
account the path asymmetry between the wearable-phone path and the
phone-server path... " -
https://anikravesh.github.io/files/wearos-sigmetrics19.pdf
I am of course puzzled as to why they didn't look into sch_cake[1] or
fq_codel derived solutions[2], (it is a non-open source OS) but they
did manage to eliminate 97% of the problem in their paper, so, there's
that.
[1] https://arxiv.org/abs/1804.07617
[2] https://www.usenix.org/system/files/conference/atc17/atc17-hoiland-jorgensen.pdf
--
Dave Täht
CTO, TekLibre, LLC
http://www.teklibre.com
Tel: 1-831-205-9740
next reply other threads:[~2019-04-07 0:14 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-07 0:13 Dave Taht [this message]
2019-04-07 19:11 ` Xiao Zhu
2019-04-08 3:44 ` Dave Taht
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