Messages in this thread Patch in this message | | | Date | Wed, 9 Nov 2005 10:36:51 -0800 | From | Greg KH <> | Subject | [patch 05/11] tcp: BIC max increment too large |
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From: Stephen Hemminger <shemminger@osdl.org>
The max growth of BIC TCP is too large. Original code was based on BIC 1.0 and the default there was 32. Later code (2.6.13) included compensation for delayed acks, and should have reduced the default value to 16; since normally TCP gets one ack for every two packets sent.
The current value of 32 makes BIC too aggressive and unfair to other flows.
Submitted-by: Injong Rhee <rhee@eos.ncsu.edu> Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
--- net/ipv4/tcp_bic.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- linux-2.6.14.1.orig/net/ipv4/tcp_bic.c +++ linux-2.6.14.1/net/ipv4/tcp_bic.c @@ -27,7 +27,7 @@ */ static int fast_convergence = 1; -static int max_increment = 32; +static int max_increment = 16; static int low_window = 14; static int beta = 819; /* = 819/1024 (BICTCP_BETA_SCALE) */ static int low_utilization_threshold = 153; -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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