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| author | Stephen Hemminger <shemminger@osdl.org> | 2004-05-08 01:28:54 -0700 |
|---|---|---|
| committer | David S. Miller <davem@nuts.davemloft.net> | 2004-05-08 01:28:54 -0700 |
| commit | 54d05783ee595b109c209b1febabd9337bf3e0b6 (patch) | |
| tree | 84fdec233fac28584cca8ce9e3a8e6a5e44a9624 /Documentation | |
| parent | fbb3aa0df16c9a46bd05481cdae42d309fb42dab (diff) | |
| download | history-54d05783ee595b109c209b1febabd9337bf3e0b6.tar.gz | |
[TCP]: BIC TCP for Linux 2.6.6
This is a version of Binary Increase Control (BIC) TCP
developed by NCSU. It is yet another TCP congestion control
algorithm for handling big fat pipes. For normal size congestion
windows it behaves the same as existing TCP Reno, but when window
is large it uses additive increase to ensure fairness and when
window is small it uses binary search increase.
For more details see the BIC TCP web page
http://www.csc.ncsu.edu/faculty/rhee/export/bitcp/
The original code was for web100 (2.4); this version is pretty
much the same but targeted for 2.6 with less sysctl parameters
and more constants.
I don't have a real high speed long haul network to test, but
when running over 1G links with delays, the performance is more stable
(ie tests are repeatable) and as fast as existing Reno.
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/networking/ip-sysctl.txt | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt index 10bcd2abbb8f2f..b0bc0ede3b1095 100644 --- a/Documentation/networking/ip-sysctl.txt +++ b/Documentation/networking/ip-sysctl.txt @@ -316,6 +316,30 @@ tcp_vegas_cong_avoid - BOOLEAN not as aggressive as TCP Reno. Default:0 +tcp_bic - BOOLEAN + Enable BIC TCP congestion control algorithm. + BIC-TCP is a sender-side only change that ensures a linear RTT + fairness under large windows while offering both scalability and + bounded TCP-friendliness. The protocol combines two schemes + called additive increase and binary search increase. When the + congestion window is large, additive increase with a large + increment ensures linear RTT fairness as well as good + scalability. Under small congestion windows, binary search + increase provides TCP friendliness. + Default: 0 + +tcp_bic_low_window - INTEGER + Sets the threshold window (in packets) where BIC TCP starts to + adjust the congestion window. Below this threshold BIC TCP behaves + the same as the default TCP Reno. + Default: 14 + +tcp_bic_fast_convergence - BOOLEAN + Forces BIC TCP to more quickly respond to changes in congestion + window. Allows two flows sharing the same connection to converge + more rapidly. + Default: 1 + ip_local_port_range - 2 INTEGERS Defines the local port range that is used by TCP and UDP to choose the local port. The first number is the first, the |