[quicwg/base-drafts] Time based loss recommendation not sensitive to paths with high RTT variability (#2207)

MikkelFJ <notifications@github.com> Wed, 19 December 2018 00:10 UTC

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Subject: [quicwg/base-drafts] Time based loss recommendation not sensitive to paths with high RTT variability (#2207)
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9/8 RTT for loss detection might be to aggressive in some cases, unless the intention is to retransmit defensively.

On occasion Denmark->Beijing ping runs stable at 211ms RTT in 7 out of 10 packets with the rest begin 280+ms, in other cases timing is all over the place, like below

```
ping -c10 xiaomi.cn
PING xiaomi.cn (58.83.160.156): 56 data bytes
64 bytes from 58.83.160.156: icmp_seq=0 ttl=44 time=211.440 ms
64 bytes from 58.83.160.156: icmp_seq=1 ttl=44 time=446.901 ms
64 bytes from 58.83.160.156: icmp_seq=2 ttl=44 time=368.392 ms
64 bytes from 58.83.160.156: icmp_seq=3 ttl=44 time=211.281 ms
64 bytes from 58.83.160.156: icmp_seq=4 ttl=44 time=511.985 ms
64 bytes from 58.83.160.156: icmp_seq=5 ttl=44 time=213.076 ms
64 bytes from 58.83.160.156: icmp_seq=6 ttl=44 time=320.433 ms
64 bytes from 58.83.160.156: icmp_seq=7 ttl=44 time=572.960 ms
64 bytes from 58.83.160.156: icmp_seq=8 ttl=44 time=493.316 ms
64 bytes from 58.83.160.156: icmp_seq=9 ttl=44 time=412.027 ms

--- xiaomi.cn ping statistics ---
10 packets transmitted, 10 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 211.281/376.181/572.960/126.994 ms
```

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