mac80211/minstrel_ht: improve rate selection stability

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Under load, otherwise stable rates can easily fluctuate because of
collisions. In my tests on a clean channel, the success probability of
the max throughput rate often stays somewhere between 90% and 100% under
load. This can cause some unnecessary switching to lower rates.
This patch improves stability by treating success probability values
between 90% and 100% the same.
In my tests on a 3x3 HT20 link with lots of TCP traffic, it improves the
average throughput by a few mbit/s.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

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Felix Fietkau 2013-03-16 17:00:25 +01:00 • committed by Johannes Berg

parent d260ff12e7

commit 3e8b1eb21c

1 changed files with 10 additions and 1 deletions

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net/mac80211/rc80211_minstrel_ht.c

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