From: Felix Fietkau <nbd@openwrt.org>
Date: Wed, 20 Oct 2010 21:01:06 +0000 (+0000)
Subject: mac80211: improve minstrel_ht performance by ensuring that rates get sampled fast... 
X-Git-Url: http://git.openwrt.org/?p=openwrt%2Fsvn-archive%2Farchive.git;a=commitdiff_plain;h=ee73eacc005b7eef1b367378f17666f7660310f6;hp=edde32c54a502b5f8e863fd71d92704dce59051f

mac80211: improve minstrel_ht performance by ensuring that rates get sampled fast enough

SVN-Revision: 23554
---

diff --git a/package/mac80211/patches/560-minstrel_ht_performance.patch b/package/mac80211/patches/560-minstrel_ht_performance.patch
new file mode 100644
index 0000000000..43ff78b3a6
--- /dev/null
+++ b/package/mac80211/patches/560-minstrel_ht_performance.patch
@@ -0,0 +1,31 @@
+--- a/net/mac80211/rc80211_minstrel_ht.h
++++ b/net/mac80211/rc80211_minstrel_ht.h
+@@ -103,6 +103,7 @@ struct minstrel_ht_sta {
+ 	u8 sample_tries;
+ 	u8 sample_count;
+ 	u8 sample_slow;
++	u8 sample_retry;
+ 
+ 	/* current MCS group to be sampled */
+ 	u8 sample_group;
+--- a/net/mac80211/rc80211_minstrel_ht.c
++++ b/net/mac80211/rc80211_minstrel_ht.c
+@@ -261,6 +261,7 @@ minstrel_ht_update_stats(struct minstrel
+ 
+ 	/* try to sample up to half of the availble rates during each interval */
+ 	mi->sample_count *= 4;
++	mi->sample_retry = mi->sample_count;
+ 
+ 	cur_prob = 0;
+ 	cur_prob_tp = 0;
+@@ -572,6 +573,10 @@ minstrel_get_sample_rate(struct minstrel
+ 	return sample_idx;
+ 
+ next:
++	if (mi->sample_retry > 0) {
++		mi->sample_retry--;
++		mi->sample_tries++;
++	}
+ 	minstrel_next_sample_idx(mi);
+ 	return -1;
+ }