mac80211: merge some more minstrel_ht performance improvements

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@35848 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/package/mac80211/patches/300-pending_work.patch b/package/mac80211/patches/300-pending_work.patch
index a1bb702..560c3f2 100644 (file)
--- a/package/mac80211/patches/300-pending_work.patch
+++ b/package/mac80211/patches/300-pending_work.patch
@@ -678,15 +678,7 @@
  }
  
  /*
-@@ -243,6 +246,7 @@ minstrel_ht_update_stats(struct minstrel
-       struct minstrel_rate_stats *mr;
-       int cur_prob, cur_prob_tp, cur_tp, cur_tp2;
-       int group, i, index;
-+      int prob_max_streams = 1;
- 
-       if (mi->ampdu_packets > 0) {
-               mi->avg_ampdu_len = minstrel_ewma(mi->avg_ampdu_len,
-@@ -308,8 +312,8 @@ minstrel_ht_update_stats(struct minstrel
+@@ -308,8 +311,8 @@ minstrel_ht_update_stats(struct minstrel
                }
        }
  
@@ -697,7 +689,7 @@
  
        cur_prob = 0;
        cur_prob_tp = 0;
-@@ -320,20 +324,13 @@ minstrel_ht_update_stats(struct minstrel
+@@ -320,20 +323,13 @@ minstrel_ht_update_stats(struct minstrel
                if (!mg->supported)
                        continue;
  
@@ -715,16 +707,16 @@
                        cur_tp2 = cur_tp;
                        mi->max_tp_rate = mg->max_tp_rate;
                        cur_tp = mr->cur_tp;
-+                      prob_max_streams = minstrel_mcs_groups[group].streams - 1;
++                      mi->max_prob_streams = minstrel_mcs_groups[group].streams - 1;
                }
  
                mr = minstrel_get_ratestats(mi, mg->max_tp_rate2);
-@@ -343,6 +340,23 @@ minstrel_ht_update_stats(struct minstrel
+@@ -343,6 +339,23 @@ minstrel_ht_update_stats(struct minstrel
                }
        }
  
-+      if (prob_max_streams < 1)
-+              prob_max_streams = 1;
++      if (mi->max_prob_streams < 1)
++              mi->max_prob_streams = 1;
 +
 +      for (group = 0; group < ARRAY_SIZE(minstrel_mcs_groups); group++) {
 +              mg = &mi->groups[group];
@@ -732,7 +724,7 @@
 +                      continue;
 +              mr = minstrel_get_ratestats(mi, mg->max_prob_rate);
 +              if (cur_prob_tp < mr->cur_tp &&
-+                  minstrel_mcs_groups[group].streams <= prob_max_streams) {
++                  minstrel_mcs_groups[group].streams <= mi->max_prob_streams) {
 +                      mi->max_prob_rate = mg->max_prob_rate;
 +                      cur_prob = mr->cur_prob;
 +                      cur_prob_tp = mr->cur_tp;
@@ -743,7 +735,7 @@
        mi->stats_update = jiffies;
  }
  
-@@ -536,7 +550,7 @@ minstrel_calc_retransmit(struct minstrel
+@@ -536,7 +549,7 @@ minstrel_calc_retransmit(struct minstrel
        mr->retry_updated = true;
  
        group = &minstrel_mcs_groups[index / MCS_GROUP_RATES];
@@ -752,3 +744,56 @@
  
        /* Contention time for first 2 tries */
        ctime = (t_slot * cw) >> 1;
+@@ -616,6 +629,7 @@ minstrel_get_sample_rate(struct minstrel
+ {
+       struct minstrel_rate_stats *mr;
+       struct minstrel_mcs_group_data *mg;
++      unsigned int sample_dur, sample_group;
+       int sample_idx = 0;
+ 
+       if (mi->sample_wait > 0) {
+@@ -626,11 +640,11 @@ minstrel_get_sample_rate(struct minstrel
+       if (!mi->sample_tries)
+               return -1;
+ 
+-      mi->sample_tries--;
+       mg = &mi->groups[mi->sample_group];
+       sample_idx = sample_table[mg->column][mg->index];
+       mr = &mg->rates[sample_idx];
+-      sample_idx += mi->sample_group * MCS_GROUP_RATES;
++      sample_group = mi->sample_group;
++      sample_idx += sample_group * MCS_GROUP_RATES;
+       minstrel_next_sample_idx(mi);
+ 
+       /*
+@@ -651,14 +665,18 @@ minstrel_get_sample_rate(struct minstrel
+        * Make sure that lower rates get sampled only occasionally,
+        * if the link is working perfectly.
+        */
+-      if (minstrel_get_duration(sample_idx) >
+-          minstrel_get_duration(mi->max_tp_rate)) {
++      sample_dur = minstrel_get_duration(sample_idx);
++      if (sample_dur >= minstrel_get_duration(mi->max_tp_rate2) &&
++          (mi->max_prob_streams <
++           minstrel_mcs_groups[sample_group].streams ||
++           sample_dur >= minstrel_get_duration(mi->max_prob_rate))) {
+               if (mr->sample_skipped < 20)
+                       return -1;
+ 
+               if (mi->sample_slow++ > 2)
+                       return -1;
+       }
++      mi->sample_tries--;
+ 
+       return sample_idx;
+ }
+--- a/net/mac80211/rc80211_minstrel_ht.h
++++ b/net/mac80211/rc80211_minstrel_ht.h
+@@ -85,6 +85,7 @@ struct minstrel_ht_sta {
+ 
+       /* best probability rate */
+       unsigned int max_prob_rate;
++      unsigned int max_prob_streams;
+ 
+       /* time of last status update */
+       unsigned long stats_update;