diff options
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 a2c893a7475d..ab65714d95fc 100644 --- a/Documentation/networking/ip-sysctl.txt +++ b/Documentation/networking/ip-sysctl.txt | |||
@@ -304,57 +304,6 @@ tcp_low_latency - BOOLEAN | |||
304 | changed would be a Beowulf compute cluster. | 304 | changed would be a Beowulf compute cluster. |
305 | Default: 0 | 305 | Default: 0 |
306 | 306 | ||
307 | tcp_westwood - BOOLEAN | ||
308 | Enable TCP Westwood+ congestion control algorithm. | ||
309 | TCP Westwood+ is a sender-side only modification of the TCP Reno | ||
310 | protocol stack that optimizes the performance of TCP congestion | ||
311 | control. It is based on end-to-end bandwidth estimation to set | ||
312 | congestion window and slow start threshold after a congestion | ||
313 | episode. Using this estimation, TCP Westwood+ adaptively sets a | ||
314 | slow start threshold and a congestion window which takes into | ||
315 | account the bandwidth used at the time congestion is experienced. | ||
316 | TCP Westwood+ significantly increases fairness wrt TCP Reno in | ||
317 | wired networks and throughput over wireless links. | ||
318 | Default: 0 | ||
319 | |||
320 | tcp_vegas_cong_avoid - BOOLEAN | ||
321 | Enable TCP Vegas congestion avoidance algorithm. | ||
322 | TCP Vegas is a sender-side only change to TCP that anticipates | ||
323 | the onset of congestion by estimating the bandwidth. TCP Vegas | ||
324 | adjusts the sending rate by modifying the congestion | ||
325 | window. TCP Vegas should provide less packet loss, but it is | ||
326 | not as aggressive as TCP Reno. | ||
327 | Default:0 | ||
328 | |||
329 | tcp_bic - BOOLEAN | ||
330 | Enable BIC TCP congestion control algorithm. | ||
331 | BIC-TCP is a sender-side only change that ensures a linear RTT | ||
332 | fairness under large windows while offering both scalability and | ||
333 | bounded TCP-friendliness. The protocol combines two schemes | ||
334 | called additive increase and binary search increase. When the | ||
335 | congestion window is large, additive increase with a large | ||
336 | increment ensures linear RTT fairness as well as good | ||
337 | scalability. Under small congestion windows, binary search | ||
338 | increase provides TCP friendliness. | ||
339 | Default: 0 | ||
340 | |||
341 | tcp_bic_low_window - INTEGER | ||
342 | Sets the threshold window (in packets) where BIC TCP starts to | ||
343 | adjust the congestion window. Below this threshold BIC TCP behaves | ||
344 | the same as the default TCP Reno. | ||
345 | Default: 14 | ||
346 | |||
347 | tcp_bic_fast_convergence - BOOLEAN | ||
348 | Forces BIC TCP to more quickly respond to changes in congestion | ||
349 | window. Allows two flows sharing the same connection to converge | ||
350 | more rapidly. | ||
351 | Default: 1 | ||
352 | |||
353 | tcp_default_win_scale - INTEGER | ||
354 | Sets the minimum window scale TCP will negotiate for on all | ||
355 | conections. | ||
356 | Default: 7 | ||
357 | |||
358 | tcp_tso_win_divisor - INTEGER | 307 | tcp_tso_win_divisor - INTEGER |
359 | This allows control over what percentage of the congestion window | 308 | This allows control over what percentage of the congestion window |
360 | can be consumed by a single TSO frame. | 309 | can be consumed by a single TSO frame. |
@@ -368,6 +317,11 @@ tcp_frto - BOOLEAN | |||
368 | where packet loss is typically due to random radio interference | 317 | where packet loss is typically due to random radio interference |
369 | rather than intermediate router congestion. | 318 | rather than intermediate router congestion. |
370 | 319 | ||
320 | tcp_congestion_control - STRING | ||
321 | Set the congestion control algorithm to be used for new | ||
322 | connections. The algorithm "reno" is always available, but | ||
323 | additional choices may be available based on kernel configuration. | ||
324 | |||
371 | somaxconn - INTEGER | 325 | somaxconn - INTEGER |
372 | Limit of socket listen() backlog, known in userspace as SOMAXCONN. | 326 | Limit of socket listen() backlog, known in userspace as SOMAXCONN. |
373 | Defaults to 128. See also tcp_max_syn_backlog for additional tuning | 327 | Defaults to 128. See also tcp_max_syn_backlog for additional tuning |