[TCP] Westwood: bandwidth filter startup (b3a92eab) · Commits · 戴 / test

The bandwidth estimate filter is now initialized with the first sample in order to have better performances in the case of small file transfers. Signed-off-by:

Luca De Cicco <ldecicco@gmail.com> Signed-off-by:

Stephen Hemminger <shemminger@dxpl.pdx.osdl.net> Signed-off-by:

David S. Miller <davem@davemloft.net>

net/ipv4/tcp_westwood.c

+9 −3

Original line number	Diff line number	Diff line
		@@ -82,11 +82,17 @@ static inline u32 westwood_do_filter(u32 a, u32 b)
		return (((7 * a) + b) >> 3);
		}

		static inline void westwood_filter(struct westwood *w, u32 delta)
		static void westwood_filter(struct westwood *w, u32 delta)
		{
		/* If the filter is empty fill it with the first sample of bandwidth */
		if (w->bw_ns_est == 0 && w->bw_est == 0) {
		w->bw_ns_est = w->bk / delta;
		w->bw_est = w->bw_ns_est;
		} else {
		w->bw_ns_est = westwood_do_filter(w->bw_ns_est, w->bk / delta);
		w->bw_est = westwood_do_filter(w->bw_est, w->bw_ns_est);
		}
		}

		/*
		* @westwood_pkts_acked

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