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Diffstat (limited to 'net/mac80211/rc80211_minstrel.c')
-rw-r--r--net/mac80211/rc80211_minstrel.c44
1 files changed, 28 insertions, 16 deletions
diff --git a/net/mac80211/rc80211_minstrel.c b/net/mac80211/rc80211_minstrel.c
index ef6e8a6c4253..5528037021ad 100644
--- a/net/mac80211/rc80211_minstrel.c
+++ b/net/mac80211/rc80211_minstrel.c
@@ -127,6 +127,32 @@ minstrel_update_rates(struct minstrel_priv *mp, struct minstrel_sta_info *mi)
rate_control_set_rates(mp->hw, mi->sta, ratetbl);
}
+/*
+* Recalculate success probabilities and counters for a given rate using EWMA
+*/
+void
+minstrel_calc_rate_stats(struct minstrel_rate_stats *mrs)
+{
+ if (unlikely(mrs->attempts > 0)) {
+ mrs->sample_skipped = 0;
+ mrs->cur_prob = MINSTREL_FRAC(mrs->success, mrs->attempts);
+ if (unlikely(!mrs->att_hist))
+ mrs->probability = mrs->cur_prob;
+ else
+ mrs->probability = minstrel_ewma(mrs->probability,
+ mrs->cur_prob, EWMA_LEVEL);
+ mrs->att_hist += mrs->attempts;
+ mrs->succ_hist += mrs->success;
+ } else {
+ mrs->sample_skipped++;
+ }
+
+ mrs->last_success = mrs->success;
+ mrs->last_attempts = mrs->attempts;
+ mrs->success = 0;
+ mrs->attempts = 0;
+}
+
static void
minstrel_update_stats(struct minstrel_priv *mp, struct minstrel_sta_info *mi)
{
@@ -146,22 +172,8 @@ minstrel_update_stats(struct minstrel_priv *mp, struct minstrel_sta_info *mi)
if (!usecs)
usecs = 1000000;
- if (unlikely(mrs->attempts > 0)) {
- mrs->sample_skipped = 0;
- mrs->cur_prob = MINSTREL_FRAC(mrs->success,
- mrs->attempts);
- mrs->succ_hist += mrs->success;
- mrs->att_hist += mrs->attempts;
- mrs->probability = minstrel_ewma(mrs->probability,
- mrs->cur_prob,
- EWMA_LEVEL);
- } else
- mrs->sample_skipped++;
-
- mrs->last_success = mrs->success;
- mrs->last_attempts = mrs->attempts;
- mrs->success = 0;
- mrs->attempts = 0;
+ /* Update success probabilities per rate */
+ minstrel_calc_rate_stats(mrs);
/* Update throughput per rate, reset thr. below 10% success */
if (mrs->probability < MINSTREL_FRAC(10, 100))