[patch 2/3] tcp: use read mostly for CUBIC parameters
From: Stephen Hemminger <hidden>
Date: 2007-02-12 16:04:38
These module parameters should be in the read mostly area to avoid cache pollution. Signed-off-by: Stephen Hemminger <redacted> --- net/ipv4/tcp_cubic.c | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-)
--- tcp.orig/net/ipv4/tcp_cubic.c 2007-02-12 07:28:55.000000000 -0800
+++ tcp/net/ipv4/tcp_cubic.c 2007-02-12 07:32:33.000000000 -0800@@ -26,16 +26,16 @@ */ #define BICTCP_HZ 10 /* BIC HZ 2^10 = 1024 */ -static int fast_convergence = 1; -static int max_increment = 16; -static int beta = 819; /* = 819/1024 (BICTCP_BETA_SCALE) */ -static int initial_ssthresh = 100; -static int bic_scale = 41; -static int tcp_friendliness = 1; - -static u32 cube_rtt_scale; -static u32 beta_scale; -static u64 cube_factor; +static int fast_convergence __read_mostly = 1; +static int max_increment __read_mostly = 16; +static int beta __read_mostly = 819; /* = 819/1024 (BICTCP_BETA_SCALE) */ +static int initial_ssthresh __read_mostly = 100; +static int bic_scale __read_mostly = 41; +static int tcp_friendliness __read_mostly = 1; + +static u32 cube_rtt_scale __read_mostly; +static u32 beta_scale __read_mostly; +static u64 cube_factor __read_mostly; /* Note parameters that are used for precomputing scale factors are read-only */ module_param(fast_convergence, int, 0644); --