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authorFelix Fietkau <nbd@openwrt.org>2010-03-07 17:00:43 +0000
committerFelix Fietkau <nbd@openwrt.org>2010-03-07 17:00:43 +0000
commite7c6e9d6038a907a34e4907e41db53d810ea6721 (patch)
tree210ebb62eeb676e7607361ac87f47977772469b5
parentd238ba254118490759ed1915a4c503aecb6ffeab (diff)
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mac80211: improve minstrel_ht performance by reducing the impact of slow sampling
SVN-Revision: 20038
-rw-r--r--package/mac80211/patches/560-minstrel_ht.patch20
1 files changed, 14 insertions, 6 deletions
diff --git a/package/mac80211/patches/560-minstrel_ht.patch b/package/mac80211/patches/560-minstrel_ht.patch
index bc50ca67e2..9fa9e05c52 100644
--- a/package/mac80211/patches/560-minstrel_ht.patch
+++ b/package/mac80211/patches/560-minstrel_ht.patch
@@ -68,7 +68,7 @@
--- /dev/null
+++ b/net/mac80211/rc80211_minstrel_ht.c
-@@ -0,0 +1,800 @@
+@@ -0,0 +1,807 @@
+/*
+ * Copyright (C) 2010 Felix Fietkau <nbd@openwrt.org>
+ *
@@ -262,6 +262,7 @@
+ int cur_prob, cur_prob_tp, cur_tp, cur_tp2;
+ int group, i, index;
+
++ mi->sample_slow = 0;
+ mi->sample_count = 0;
+ mi->max_tp_rate = 0;
+ mi->max_tp_rate2 = 0;
@@ -542,7 +543,9 @@
+ if (!mr->retry_updated)
+ minstrel_calc_retransmit(mp, mi, index);
+
-+ if (rtscts)
++ if (mr->probability < MINSTREL_FRAC(20, 100))
++ rate->count = 2;
++ else if (rtscts)
+ rate->count = mr->retry_count_rtscts;
+ else
+ rate->count = mr->retry_count;
@@ -595,9 +598,13 @@
+ * if the link is working perfectly.
+ */
+ if (minstrel_get_duration(sample_idx) >
-+ minstrel_get_duration(mi->max_tp_rate) &&
-+ mr->sample_skipped < 10)
-+ goto next;
++ minstrel_get_duration(mi->max_tp_rate)) {
++ if (mr->sample_skipped < 10)
++ goto next;
++
++ if (mi->sample_slow++ > 2)
++ goto next;
++ }
+
+ return sample_idx;
+
@@ -871,7 +878,7 @@
+}
--- /dev/null
+++ b/net/mac80211/rc80211_minstrel_ht.h
-@@ -0,0 +1,120 @@
+@@ -0,0 +1,121 @@
+/*
+ * Copyright (C) 2010 Felix Fietkau <nbd@openwrt.org>
+ *
@@ -967,6 +974,7 @@
+ u8 sample_wait;
+ u8 sample_tries;
+ u8 sample_count;
++ u8 sample_slow;
+
+ /* current MCS group to be sampled */
+ u8 sample_group;