From: David S. Miller <davem@sunset.davemloft.net>
Date: Tue, 28 Nov 2006 22:37:38 +0000 (-0800)
Subject: [TCP] Vegas: Increase default alpha to 2 and beta to 4.
X-Git-Tag: v2.6.20-rc1~34^2~40^2~121
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d2e4bdc8704b0e711c5046a430bfd1681b0bd5a9;p=linux-2.6

[TCP] Vegas: Increase default alpha to 2 and beta to 4.

This helps Vegas cope better with delayed ACKs, see
analysis at:

http://www.cs.caltech.edu/%7Eweixl/technical/ns2linux/known_linux/index.html#vegas

Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/ipv4/tcp_vegas.c b/net/ipv4/tcp_vegas.c
index a3b7aa015a..ddc4bcc578 100644
--- a/net/ipv4/tcp_vegas.c
+++ b/net/ipv4/tcp_vegas.c
@@ -42,8 +42,8 @@
  * with V_PARAM_SHIFT bits to the right of the binary point.
  */
 #define V_PARAM_SHIFT 1
-static int alpha = 1<<V_PARAM_SHIFT;
-static int beta  = 3<<V_PARAM_SHIFT;
+static int alpha = 2<<V_PARAM_SHIFT;
+static int beta  = 4<<V_PARAM_SHIFT;
 static int gamma = 1<<V_PARAM_SHIFT;
 
 module_param(alpha, int, 0644);