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mac80211/minstrel_ht: do not sample actively used rates 

max_tp_rate2 and max_prob_rate tend to get used occasionally during
retransmission, which is more useful for the statistics than probing
with individual probe packets.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Felix Fietkau 2013-03-16 17:00:27 +01:00 committed by Johannes Berg
parent bc96f24266
commit a0ca796c46
1 changed files with 5 additions and 2 deletions
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7
net/mac80211/rc80211_minstrel_ht.c
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@ -648,10 +648,13 @@ minstrel_get_sample_rate(struct minstrel_priv *mp, struct minstrel_ht_sta *mi)
/*
* Sampling might add some overhead (RTS, no aggregation)
* to the frame. Hence, don't use sampling for the currently
* used max TP rate.
* used rates.
*/
if (sample_idx == mi->max_tp_rate)
if (sample_idx == mi->max_tp_rate ||
sample_idx == mi->max_tp_rate2 ||
sample_idx == mi->max_prob_rate)
return -1;
/*
* Do not sample if the probability is already higher than 95%
* to avoid wasting airtime.