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Commit db8c5ee6 authored by Thomas Huehn's avatar Thomas Huehn Committed by Johannes Berg
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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: default avatarFelix Fietkau <nbd@openwrt.org>
Signed-off-by: default avatarThomas Huehn <thomas@net.t-labs.tu-berlin.de>
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent f744bf81

net/mac80211/rc80211_minstrel.c

+6 −1
Original line number Diff line number Diff line
@@ -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) ||