diff options
| author |   Thomas Huehn <thomas@net.t-labs.tu-berlin.de> | 2013-03-04 23:30:01 +0100 |
|---|---|---|
| committer |   Johannes Berg <johannes.berg@intel.com> | 2013-03-06 16:36:06 +0100 |
| commit | a512d4b543ea20ec84f712f90a5229ab88a9709c (patch) | |
| tree | d3c3f6354f371fff701a4b365964b155873ee544 /net/mac80211/rc80211_minstrel.c | |
| parent | mac80211/minstrel_ht: disable multiple consecutive sample attempts (diff) | |
| download | linux-dev-a512d4b543ea20ec84f712f90a5229ab88a9709c.tar.xz linux-dev-a512d4b543ea20ec84f712f90a5229ab88a9709c.zip | |
mac80211: merge EWMA calculation of minstrel_ht and minstrel
Both rate control algorithms (minstrel and minstrel_ht) calculate
averages based on EWMA. Shift function minstrel_ewma() into
rc80211_minstrel.h and make use of it in both minstrel version.
Also shift the default EWMA level (75%) definition to the header file
and clean up variable usage.
Acked-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Thomas Huehn <thomas@net.t-labs.tu-berlin.de>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211/rc80211_minstrel.c')
| -rw-r--r-- | net/mac80211/rc80211_minstrel.c | 15 |
1 files changed, 5 insertions, 10 deletions
diff --git a/net/mac80211/rc80211_minstrel.c b/net/mac80211/rc80211_minstrel.c index eea45a2c7c35..d78f629179c7 100644 --- a/net/mac80211/rc80211_minstrel.c +++ b/net/mac80211/rc80211_minstrel.c @@ -76,7 +76,6 @@ minstrel_update_stats(struct minstrel_priv *mp, struct minstrel_sta_info *mi) u32 max_tp = 0, index_max_tp = 0, index_max_tp2 = 0; u32 max_prob = 0, index_max_prob = 0; u32 usecs; - u32 p; int i; mi->stats_update = jiffies; @@ -90,14 +89,13 @@ minstrel_update_stats(struct minstrel_priv *mp, struct minstrel_sta_info *mi) /* To avoid rounding issues, probabilities scale from 0 (0%) * to 18000 (100%) */ if (mr->attempts) { - p = (mr->success * 18000) / mr->attempts; + mr->cur_prob = (mr->success * 18000) / mr->attempts; mr->succ_hist += mr->success; mr->att_hist += mr->attempts; - mr->cur_prob = p; - p = ((p * (100 - mp->ewma_level)) + (mr->probability * - mp->ewma_level)) / 100; - mr->probability = p; - mr->cur_tp = p * (1000000 / usecs); + mr->probability = minstrel_ewma(mr->probability, + mr->cur_prob, + EWMA_LEVEL); + mr->cur_tp = mr->probability * (1000000 / usecs); } mr->last_success = mr->success; @@ -542,9 +540,6 @@ minstrel_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir) mp->lookaround_rate = 5; mp->lookaround_rate_mrr = 10; - /* moving average weight for EWMA */ - mp->ewma_level = 75; - /* maximum time that the hw is allowed to stay in one MRR segment */ mp->segment_size = 6000; |