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mac80211: treat minstrel success probabilities below 10% as implausible 

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.

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>
This commit is contained in:
Thomas Huehn 2013-03-04 23:30:06 +01:00 committed by Johannes Berg
parent f744bf81f7
commit db8c5ee692
1 changed files with 6 additions and 1 deletions
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7
net/mac80211/rc80211_minstrel.c
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@ -92,7 +92,6 @@ minstrel_update_stats(struct minstrel_priv *mp, struct minstrel_sta_info *mi)
mr->probability = minstrel_ewma(mr->probability, mr->probability = minstrel_ewma(mr->probability,
mr->cur_prob, mr->cur_prob,
EWMA_LEVEL); EWMA_LEVEL);
mr->cur_tp = mr->probability * (1000000 / usecs);
} else } else
mr->sample_skipped++; mr->sample_skipped++;
@ -101,6 +100,12 @@ minstrel_update_stats(struct minstrel_priv *mp, struct minstrel_sta_info *mi)
mr->success = 0; mr->success = 0;
mr->attempts = 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 below the 10% chance of success.
* Sample less often above the 95% chance of success. */ * Sample less often above the 95% chance of success. */
if (mr->probability > MINSTREL_FRAC(95, 100) || if (mr->probability > MINSTREL_FRAC(95, 100) ||