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mac80211: improve minstrel_ht performance by reducing the impact of slow sampling

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@20038 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd 2010-03-07 17:00:43 +00:00
parent d19c65588b
commit 32997050fa
1 changed files with 14 additions and 6 deletions
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20
package/mac80211/patches/560-minstrel_ht.patch
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@ -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;