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authorFelix Fietkau <nbd@openwrt.org>2013-03-16 16:11:43 +0000
committerFelix Fietkau <nbd@openwrt.org>2013-03-16 16:11:43 +0000
commit541344b93e0a5085611d5e67eb66d329ee8ffe60 (patch)
treee405377aa48e5b30aa1a28fce2da60b976c699a4
parente3bdc13980dea05f9cd0fbd24cd0229c531c6e02 (diff)
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mac80211: merge a few minstrel_ht performance improvements
SVN-Revision: 36056
-rw-r--r--package/mac80211/patches/300-pending_work.patch53
1 files changed, 43 insertions, 10 deletions
diff --git a/package/mac80211/patches/300-pending_work.patch b/package/mac80211/patches/300-pending_work.patch
index 72a0081..cf51aae 100644
--- a/package/mac80211/patches/300-pending_work.patch
+++ b/package/mac80211/patches/300-pending_work.patch
@@ -652,19 +652,31 @@
#define CCK_ACK_DURATION(_bitrate, _short) \
(CCK_DURATION((_bitrate > 10 ? 20 : 10), false, 60) + \
-@@ -211,7 +211,8 @@ static void
+@@ -211,20 +211,32 @@ static void
minstrel_ht_calc_tp(struct minstrel_ht_sta *mi, int group, int rate)
{
struct minstrel_rate_stats *mr;
- unsigned int usecs = 0;
+ unsigned int nsecs = 0;
+ unsigned int tp;
++ unsigned int prob;
mr = &mi->groups[group].rates[rate];
++ prob = mr->probability;
-@@ -221,10 +222,12 @@ minstrel_ht_calc_tp(struct minstrel_ht_s
+- if (mr->probability < MINSTREL_FRAC(1, 10)) {
++ if (prob < MINSTREL_FRAC(1, 10)) {
+ mr->cur_tp = 0;
+ return;
}
++ /*
++ * For the throughput calculation, limit the probability value to 90% to
++ * account for collision related packet error rate fluctuation
++ */
++ if (prob > MINSTREL_FRAC(9, 10))
++ prob = MINSTREL_FRAC(9, 10);
++
if (group != MINSTREL_CCK_GROUP)
- usecs = mi->overhead / MINSTREL_TRUNC(mi->avg_ampdu_len);
+ nsecs = 1000 * mi->overhead / MINSTREL_TRUNC(mi->avg_ampdu_len);
@@ -678,7 +690,7 @@
}
/*
-@@ -308,8 +311,8 @@ minstrel_ht_update_stats(struct minstrel
+@@ -308,8 +320,8 @@ minstrel_ht_update_stats(struct minstrel
}
}
@@ -689,7 +701,7 @@
cur_prob = 0;
cur_prob_tp = 0;
-@@ -320,20 +323,13 @@ minstrel_ht_update_stats(struct minstrel
+@@ -320,20 +332,13 @@ minstrel_ht_update_stats(struct minstrel
if (!mg->supported)
continue;
@@ -711,7 +723,7 @@
}
mr = minstrel_get_ratestats(mi, mg->max_tp_rate2);
-@@ -343,6 +339,23 @@ minstrel_ht_update_stats(struct minstrel
+@@ -343,6 +348,23 @@ minstrel_ht_update_stats(struct minstrel
}
}
@@ -735,7 +747,7 @@
mi->stats_update = jiffies;
}
-@@ -467,7 +480,7 @@ minstrel_ht_tx_status(void *priv, struct
+@@ -467,7 +489,7 @@ minstrel_ht_tx_status(void *priv, struct
if (!mi->sample_wait && !mi->sample_tries && mi->sample_count > 0) {
mi->sample_wait = 16 + 2 * MINSTREL_TRUNC(mi->avg_ampdu_len);
@@ -744,7 +756,7 @@
mi->sample_count--;
}
-@@ -536,7 +549,7 @@ minstrel_calc_retransmit(struct minstrel
+@@ -536,7 +558,7 @@ minstrel_calc_retransmit(struct minstrel
mr->retry_updated = true;
group = &minstrel_mcs_groups[index / MCS_GROUP_RATES];
@@ -753,7 +765,7 @@
/* Contention time for first 2 tries */
ctime = (t_slot * cw) >> 1;
-@@ -616,6 +629,7 @@ minstrel_get_sample_rate(struct minstrel
+@@ -616,6 +638,7 @@ minstrel_get_sample_rate(struct minstrel
{
struct minstrel_rate_stats *mr;
struct minstrel_mcs_group_data *mg;
@@ -761,7 +773,7 @@
int sample_idx = 0;
if (mi->sample_wait > 0) {
-@@ -626,11 +640,11 @@ minstrel_get_sample_rate(struct minstrel
+@@ -626,39 +649,46 @@ minstrel_get_sample_rate(struct minstrel
if (!mi->sample_tries)
return -1;
@@ -775,7 +787,28 @@
minstrel_next_sample_idx(mi);
/*
-@@ -651,14 +665,18 @@ minstrel_get_sample_rate(struct minstrel
+ * Sampling might add some overhead (RTS, no aggregation)
+ * to the frame. Hence, don't use sampling for the currently
+- * used max TP rate.
++ * used rates.
+ */
+- if (sample_idx == mi->max_tp_rate)
++ if (sample_idx == mi->max_tp_rate ||
++ sample_idx == mi->max_tp_rate2 ||
++ sample_idx == mi->max_prob_rate)
+ return -1;
++
+ /*
+- * When not using MRR, do not sample if the probability is already
+- * higher than 95% to avoid wasting airtime
++ * Do not sample if the probability is already higher than 95%
++ * to avoid wasting airtime.
+ */
+- if (!mp->has_mrr && (mr->probability > MINSTREL_FRAC(95, 100)))
++ if (mr->probability > MINSTREL_FRAC(95, 100))
+ return -1;
+
+ /*
* Make sure that lower rates get sampled only occasionally,
* if the link is working perfectly.
*/