diff options
| author |   Felix Fietkau <nbd@nbd.name> | 2018-10-06 19:35:07 +0200 |
|---|---|---|
| committer |   Johannes Berg <johannes.berg@intel.com> | 2018-10-11 16:01:05 +0200 |
| commit | 506dbf90c1ba98d998b26e17a2e3e69bffef52f4 (patch) | |
| tree | c4476f0b470499290908109f3259d192e71ee1b5 /net/mac80211/rc80211_minstrel.c | |
| parent | mac80211: minstrel: do not sample rates 3 times slower than max_prob_rate (diff) | |
| download | linux-dev-506dbf90c1ba98d998b26e17a2e3e69bffef52f4.tar.xz linux-dev-506dbf90c1ba98d998b26e17a2e3e69bffef52f4.zip | |
mac80211: rc80211_minstrel: remove variance / stddev calculation
When there are few packets (e.g. for sampling attempts), the exponentially
weighted variance is usually vastly overestimated, making the resulting data
essentially useless. As far as I know, there has not been any practical use
for this, so let's not waste any cycles on it.
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211/rc80211_minstrel.c')
| -rw-r--r-- | net/mac80211/rc80211_minstrel.c | 6 |
1 files changed, 0 insertions, 6 deletions
diff --git a/net/mac80211/rc80211_minstrel.c b/net/mac80211/rc80211_minstrel.c index dead57ba9eac..a34e9c2ca626 100644 --- a/net/mac80211/rc80211_minstrel.c +++ b/net/mac80211/rc80211_minstrel.c @@ -167,12 +167,6 @@ minstrel_calc_rate_stats(struct minstrel_rate_stats *mrs) if (unlikely(!mrs->att_hist)) { mrs->prob_ewma = cur_prob; } else { - /* update exponential weighted moving variance */ - mrs->prob_ewmv = minstrel_ewmv(mrs->prob_ewmv, - cur_prob, - mrs->prob_ewma, - EWMA_LEVEL); - /*update exponential weighted moving avarage */ mrs->prob_ewma = minstrel_ewma(mrs->prob_ewma, cur_prob, |