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authorThomas Huehn <thomas@net.t-labs.tu-berlin.de>2013-03-04 22:30:05 (GMT)
committerJohannes Berg <johannes.berg@intel.com>2013-03-06 15:36:09 (GMT)
commitf744bf81f7501d03f45ba23f9cf947abc3b422c9 (patch)
tree365aa54da77095cc1e31fdf63a6d51669633f0c0 /net/mac80211/rc80211_minstrel_ht.c
parent1e9c27df7b4a59f2269b9c88a5cef1e9018e77f6 (diff)
downloadlinux-f744bf81f7501d03f45ba23f9cf947abc3b422c9.tar.xz
mac80211: add lowest rate into minstrel's random rate sampling table
While minstrel bootstraps and fills the success probabilities of each rate the lowest rate has typically a very high success probability (often 100% in our tests). Its statistics are never updated but considered to setup the mrr chain. In our tests we see that especially the 3rd mrr stage (which is that rate providing highest success probability) is filled with the lowest rate because its initial high sucess probability is never updated. By design the 4th mrr stage is filled with the lowest rate so often 3rd and 4th mrr stage are equal. This patch follows minstrels general approach of assuming as little as possible about rate dependencies. Consequently we include the lowest rate into the random sampling table to get balanced up-to-date statistics of all rates and therefore balanced decisions. Acked-by: Felix Fietkau <nbd@openwrt.org> Signed-off-by: Thomas Huehn <thomas@net.t-labs.tu-berlin.de> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211/rc80211_minstrel_ht.c')
-rw-r--r--net/mac80211/rc80211_minstrel_ht.c1
1 files changed, 0 insertions, 1 deletions
diff --git a/net/mac80211/rc80211_minstrel_ht.c b/net/mac80211/rc80211_minstrel_ht.c
index 3009e45..749552b 100644
--- a/net/mac80211/rc80211_minstrel_ht.c
+++ b/net/mac80211/rc80211_minstrel_ht.c
@@ -17,7 +17,6 @@
#include "rc80211_minstrel_ht.h"
#define AVG_PKT_SIZE 1200
-#define SAMPLE_COLUMNS 10
/* Number of bits for an average sized packet */
#define MCS_NBITS (AVG_PKT_SIZE << 3)