tcp: avoid min-RTT overestimation from delayed ACKs

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This patch avoids having TCP sender or congestion control
overestimate the min RTT by orders of magnitude. This happens when
all the samples in the windowed filter are one-packet transfer
like small request and health-check like chit-chat, which is farily
common for applications using persistent connections. This patch
tries to conservatively labels and skip RTT samples obtained from
this type of workload.

Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Soheil Hassas Yeganeh <soheil@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Yuchung Cheng 2018-01-17 12:11:00 -08:00 • committed by David S. Miller

parent 60c2530696

commit eb36be0fd5

1 changed files with 21 additions and 2 deletions

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net/ipv4/tcp_input.c

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