tree 76d969bd7fd83ef2903f47c61d3286949a3138b8
parent 2e54a6895e3e0cada8d194ace4f5baae643a073f
author Felix Fietkau <nbd@openwrt.org> 1426240484 +0100
committer Johannes Berg <johannes.berg@intel.com> 1426586610 +0100

mac80211: minstrel_ht: fix rounding issue in MCS duration calculation

On very high MCS bitrates, the calculated duration of rates that are
next to each other can be very imprecise, due to the small packet size
used as reference (1200 bytes).
This is most visible in VHT80 nss=2 MCS8/9, for which minstrel shows the
same throughput when the probability is also the same. This leads to a
bad rate selection for such rates.

Fix this issue by introducing an average A-MPDU size factor into the
calculation.

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