mac80211: decrease the minstrel_ht sampling interval for faster rate adaption

SVN-Revision: 23555

package/mac80211/patches/560-minstrel_ht_performance.patch

@@ -18,13 +18,14 @@
  
  	cur_prob = 0;
  	cur_prob_tp = 0;
-@@ -572,6 +573,10 @@ minstrel_get_sample_rate(struct minstrel
+@@ -572,6 +573,11 @@ minstrel_get_sample_rate(struct minstrel
  	return sample_idx;
  
  next:
 +	if (mi->sample_retry > 0) {
 +		mi->sample_retry--;
 +		mi->sample_tries++;
++		mi->sample_wait = 1;
 +	}
  	minstrel_next_sample_idx(mi);
  	return -1;

package/mac80211/patches/561-minstrel_ht_sampling_interval.patch

@@ -0,0 +1,11 @@
+--- a/net/mac80211/rc80211_minstrel_ht.c
++++ b/net/mac80211/rc80211_minstrel_ht.c
+@@ -408,7 +408,7 @@ minstrel_ht_tx_status(void *priv, struct
+ 	mi->ampdu_len += info->status.ampdu_len;
+ 
+ 	if (!mi->sample_wait && !mi->sample_tries && mi->sample_count > 0) {
+-		mi->sample_wait = 4 + 2 * MINSTREL_TRUNC(mi->avg_ampdu_len);
++		mi->sample_wait = 8 + MINSTREL_TRUNC(mi->avg_ampdu_len);
+ 		mi->sample_tries = 3;
+ 		mi->sample_count--;
+ 	}