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[6/7] mac80211: treat minstrel success probabilities below 10% as implausible

Message ID 1362159456-39448-7-git-send-email-thomas@net.t-labs.tu-berlin.de (mailing list archive)
State Not Applicable, archived
Headers show

Commit Message

Thomas Huehn March 1, 2013, 5:37 p.m. UTC 
Based on minstrel_ht this patch treats success probabilities below 10% as
implausible values for throughput calculation in minstrel's statistics.
Current throughput per rate with such a low success probability is reset
to 0 MBit/s.

Signed-off-by: Thomas Huehn <thomas@net.t-labs.tu-berlin.de>
---
 net/mac80211/rc80211_minstrel.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)
diff mbox

Patch

diff --git a/net/mac80211/rc80211_minstrel.c b/net/mac80211/rc80211_minstrel.c
index c28e60a..8af71f6 100644
--- a/net/mac80211/rc80211_minstrel.c
+++ b/net/mac80211/rc80211_minstrel.c
@@ -92,7 +92,6 @@  minstrel_update_stats(struct minstrel_priv *mp, struct minstrel_sta_info *mi)
 			mr->probability = minstrel_ewma(mr->probability,
 							mr->cur_prob,
 							EWMA_LEVEL);
-			mr->cur_tp = mr->probability * (1000000 / usecs);
 		} else
 			mr->sample_skipped++;
 
@@ -101,6 +100,12 @@  minstrel_update_stats(struct minstrel_priv *mp, struct minstrel_sta_info *mi)
 		mr->success = 0;
 		mr->attempts = 0;
 
+		/* Update throughput per rate, reset thr. below 10% success */
+		if (mr->probability < MINSTREL_FRAC(10, 100))
+			mr->cur_tp = 0;
+		else
+			mr->cur_tp = mr->probability * (1000000 / usecs);
+
 		/* Sample less often below the 10% chance of success.
 		 * Sample less often above the 95% chance of success. */
 		if (mr->probability > MINSTREL_FRAC(95, 100) ||