Page MenuHomeFreeBSD
Differential D42918

tcp: shift PRR sending cadence left to prevent long runs of ACKs not clocking out a segment
ClosedPublic
Actions

Authored by rscheff on Dec 5 2023, 10:47 PM.
Tags
None
Referenced Files
Unknown Object (File)
Sat, Aug 22, 8:36 PM
Unknown Object (File)
Sat, Aug 22, 5:33 PM
Unknown Object (File)
Fri, Aug 21, 9:29 PM
Unknown Object (File)
Wed, Aug 19, 5:20 PM
Unknown Object (File)
Tue, Aug 18, 12:12 PM
Unknown Object (File)
Fri, Aug 14, 2:46 PM
Unknown Object (File)
Fri, Aug 14, 2:46 PM
Unknown Object (File)
Sat, Aug 8, 7:24 PM
View All Files
Subscribers
imp
melifaro

Details

Reviewers
cc
thj
rrs
jtl
glebius
zlei
tuexen
Group Reviewers
transport
Commits
rG35707083c6fb: tcp: shift PRR sending cadence slightly left
rG9276ad23b872: tcp: shift PRR sending cadence slightly left
Summary

PRR currently can start by waiting a short run of ACKs
without sending any segments - partially due to limited
transmit.

This change pulls the transmission opportunities slightly
leftward, preventing long runs of ACKs (initially up to 4)
before a segment is allowed for transmit. Depending on
the expected cwnd reduction, and if ACK compression is
happening, at most every other ACK should now elicit a
new segment.

Diff Detail

Repository
rG FreeBSD src repository
Lint
Lint Not Applicable
Unit
Tests Not Applicable

Revision Contents
Changeset List

PathSize
sys/
netinet/
2 lines

Diff 131133

View Options

sys/netinet/tcp_input.c

Loading...