Felix Fietkau 347c2989a8 mac80211: minstrel_ht: fix rounding error in throughput calculation
On lower data rates, the throughput calculation has a significant rounding
error, causing rates like 48M and 54M OFDM to share the same throughput
value with >= 90% success probablity.

This is because the result of the division (prob_avg * 1000) / nsecs
is really small (8 in this example).

Improve accuracy by moving over some zeroes, making better use of the full
range of u32 before the division.

Signed-off-by: Felix Fietkau <nbd@nbd.name>
Link: https://lore.kernel.org/r/20210115120242.89616-10-nbd@nbd.name
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2021-01-22 09:11:37 +01:00
2021-01-21 13:45:13 +01:00
2021-01-15 23:55:16 +01:00
2021-01-17 16:37:05 -08:00

Linux kernel
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