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mac80211/minstrel_ht: increase sampling frequency of some slower rates

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If a rate is below the max_tp_rate, sample it frequently if:
- it is above max_tp_rate2, or
- it is above max_prob_rate and is a candidate for max_prob_rate
  (has fewer streams than max_tp_rate).
This helps the retry chain recover more quickly from bad statistics
caused by collisions or interference, and slightly reduces throughput
fluctuations with higher rates.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Felix Fietkau
2013-03-03 12:49:51 +01:00
committed by Johannes Berg
parent 96d4ac3f2f
commit 965237ab9f
2 changed files with 13 additions and 8 deletions
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net/mac80211/rc80211_minstrel_ht.h
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@@ -85,6 +85,7 @@ struct minstrel_ht_sta {
/* best probability rate */
unsigned int max_prob_rate;
unsigned int max_prob_streams;
/* time of last status update */
unsigned long stats_update;