[TCP]: cubic update for net-2.6.22 (e1c3e7ab) · Commits · 戴 / test

The following update received from Injong updates TCP cubic to the latest version. I am running more complete tests and will have results after 4/1. According to Injong: the new version improves on its scalability, fairness and stability. So in all properties, we confirmed it shows better performance. NCSU results (for 2.6.18 and 2.6.20) available: http://netsrv.csc.ncsu.edu/wiki/index.php/TCP_Testing This version is described in a new Internet draft for CUBIC. http://www.ietf.org/internet-drafts/draft-rhee-tcp-cubic-00.txt Signed-off-by:

Stephen Hemminger <shemminger@linux-foundation.org> Signed-off-by:

David S. Miller <davem@davemloft.net>

net/ipv4/tcp_cubic.c

+5 −3

Original line number	Diff line number	Diff line
		/*
		* TCP CUBIC: Binary Increase Congestion control for TCP v2.0
		* TCP CUBIC: Binary Increase Congestion control for TCP v2.1
		*
		* This is from the implementation of CUBIC TCP in
		* Injong Rhee, Lisong Xu.
		@@ -214,7 +214,9 @@ static inline void bictcp_update(struct bictcp *ca, u32 cwnd)
		if (ca->delay_min > 0) {
		/* max increment = Smax * rtt / 0.1 */
		min_cnt = (cwnd * HZ * 8)/(10 * max_increment * ca->delay_min);
		if (ca->cnt < min_cnt)

		/* use concave growth when the target is above the origin */
		if (ca->cnt < min_cnt && t >= ca->bic_K)
		ca->cnt = min_cnt;
		}

		@@ -400,4 +402,4 @@ module_exit(cubictcp_unregister);
		MODULE_AUTHOR("Sangtae Ha, Stephen Hemminger");
		MODULE_LICENSE("GPL");
		MODULE_DESCRIPTION("CUBIC TCP");
		MODULE_VERSION("2.0");
		MODULE_VERSION("2.1");

Admin message