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author | Stephen Hemminger <shemminger@osdl.org> | 2005-06-23 12:22:36 -0700 |
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committer | David S. Miller <davem@davemloft.net> | 2005-06-23 12:22:36 -0700 |
commit | 9d7bcfc6b8586ee5a52043f061e0411965e71b88 (patch) | |
tree | ef6aa8e6fd9dc0c7187b9cd1497d13e180ae36a8 /Documentation/networking/ip-sysctl.txt | |
parent | 056ede6cface66b400cd3b8e60ed077cc5b85c18 (diff) | |
download | kernel_samsung_smdk4412-9d7bcfc6b8586ee5a52043f061e0411965e71b88.zip kernel_samsung_smdk4412-9d7bcfc6b8586ee5a52043f061e0411965e71b88.tar.gz kernel_samsung_smdk4412-9d7bcfc6b8586ee5a52043f061e0411965e71b88.tar.bz2 |
[TCP]: Update sysctl and congestion control documentation.
Update the documentation to remove the old sysctl values and
include the new congestion control infrastructure. Includes
changes to tcp.txt by Ian McDonald.
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation/networking/ip-sysctl.txt')
-rw-r--r-- | Documentation/networking/ip-sysctl.txt | 56 |
1 files changed, 5 insertions, 51 deletions
diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt index a2c893a..ab65714 100644 --- a/Documentation/networking/ip-sysctl.txt +++ b/Documentation/networking/ip-sysctl.txt @@ -304,57 +304,6 @@ tcp_low_latency - BOOLEAN changed would be a Beowulf compute cluster. Default: 0 -tcp_westwood - BOOLEAN - Enable TCP Westwood+ congestion control algorithm. - TCP Westwood+ is a sender-side only modification of the TCP Reno - protocol stack that optimizes the performance of TCP congestion - control. It is based on end-to-end bandwidth estimation to set - congestion window and slow start threshold after a congestion - episode. Using this estimation, TCP Westwood+ adaptively sets a - slow start threshold and a congestion window which takes into - account the bandwidth used at the time congestion is experienced. - TCP Westwood+ significantly increases fairness wrt TCP Reno in - wired networks and throughput over wireless links. - Default: 0 - -tcp_vegas_cong_avoid - BOOLEAN - Enable TCP Vegas congestion avoidance algorithm. - TCP Vegas is a sender-side only change to TCP that anticipates - the onset of congestion by estimating the bandwidth. TCP Vegas - adjusts the sending rate by modifying the congestion - window. TCP Vegas should provide less packet loss, but it is - 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 - -tcp_default_win_scale - INTEGER - Sets the minimum window scale TCP will negotiate for on all - conections. - Default: 7 - tcp_tso_win_divisor - INTEGER This allows control over what percentage of the congestion window can be consumed by a single TSO frame. @@ -368,6 +317,11 @@ tcp_frto - BOOLEAN where packet loss is typically due to random radio interference rather than intermediate router congestion. +tcp_congestion_control - STRING + Set the congestion control algorithm to be used for new + connections. The algorithm "reno" is always available, but + additional choices may be available based on kernel configuration. + somaxconn - INTEGER Limit of socket listen() backlog, known in userspace as SOMAXCONN. Defaults to 128. See also tcp_max_syn_backlog for additional tuning |