Date: Sun, 27 Jan 2019 22:54:12 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 235256] [net] IW10 without ABC leads to initial window of 11 Segments Message-ID: <bug-235256-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=235256 Bug ID: 235256 Summary: [net] IW10 without ABC leads to initial window of 11 Segments Product: Base System Version: CURRENT Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: srichard@netapp.com Attachment #201465 text/plain mime type: Created attachment 201465 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=201465&action=edit packetdrill script to validate IW10 behavior without ABC Checking the Initial Window while disabling Appropriate Byte Counting: net.inet.tcp.rfc3465=0 net.inet.tcp.initcwnd_segments=10 Transmits 11 packets (also exceeding the hardcoded limit of 14600 octets). After a casual inspection, this may be present since BSD10 when modular congestion control moved relevant code around. Possibly this is due to the final ACK of the 3WHS getting processed normally, and without ABC checking that this is an empty ACK, immeditately increasing cwnd -- You are receiving this mail because: You are the assignee for the bug.help
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