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/>
next in thread | raw e-mail | index | archive | help
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D235256 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=3D201465&action= =3Dedit packetdrill script to validate IW10 behavior without ABC Checking the Initial Window while disabling Appropriate Byte Counting: net.inet.tcp.rfc3465=3D0 net.inet.tcp.initcwnd_segments=3D10 Transmits 11 packets (also exceeding the hardcoded limit of 14600 octets).= =20 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 normall= y, and without ABC checking that this is an empty ACK, immeditately increasing cwnd --=20 You are receiving this mail because: You are the assignee for the bug.=
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?bug-235256-227>