linux-toradex.git/net/mac80211/rc80211_minstrel_debugfs.c, branch v5.1

mac80211: rc80211_minstrel: remove variance / stddev calculation

2018-10-11T14:01:05+00:00

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 
Signed-off-by: Johannes Berg

mac80211: minstrel: merge with minstrel_ht, always enable VHT support

2018-10-11T14:01:01+00:00

Legacy-only devices are not very common and the overhead of the extra
code for HT and VHT rates is not big enough to justify all those extra
lines of code to make it optional.

Signed-off-by: Felix Fietkau 
Signed-off-by: Johannes Berg

mac80211: minstrel: remove unnecessary debugfs cleanup code

2018-10-11T14:01:00+00:00

debugfs entries are cleaned up by debugfs_remove_recursive already.

Signed-off-by: Felix Fietkau 
Signed-off-by: Johannes Berg

net: Use octal not symbolic permissions

2018-03-26T16:07:48+00:00

Prefer the direct use of octal for permissions.

Done with checkpatch -f --types=SYMBOLIC_PERMS --fix-inplace
and some typing.

Miscellanea:

o Whitespace neatening around these conversions.

Signed-off-by: Joe Perches 
Signed-off-by: David S. Miller

mac80211: minstrel: store probability variance instead of standard deviation

2016-12-15T10:07:52+00:00

This avoids the costly int_sqrt calls in the statistics update and moves
it to the debugfs code instead.
This also fixes an overflow in the previous standard deviation
calculation.

Signed-off-by: Thomas Huehn 
Signed-off-by: Felix Fietkau 
Signed-off-by: Johannes Berg

mac80211: minstrel: remove cur_prob from debugfs

2016-12-15T10:07:52+00:00

This field is redundant, because it is simply last success divided by
last attempt count. Removing it from the rate stats struct saves about
1.2 KiB per HT station.

Signed-off-by: Felix Fietkau 
Signed-off-by: Johannes Berg

mac80211: minstrel[_ht]: remove non-ascii debugfs characters

2015-09-29T13:56:47+00:00

Replace the average symbol by "avg" to avoid being warned about the
non-ASCII symbol all the time, line up the columns properly.

(I changed my mind - the warnings are getting annoying)

Signed-off-by: Johannes Berg

mac80211: add standard deviation to Minstrel stats

2015-04-01T18:44:33+00:00

This patch adds the statistical descriptor "standard deviation"
to better describe the current properties of Minstrel and
Minstrel-HTs success probability distribution. The standard
deviation (SD) is calculated as exponential weighted moving
standard deviation (EWMSD) and its current value is added as
new column in all rc_stats (in debugfs).

Signed-off-by: Thomas Huehn 
Acked-by: Felix Fietkau 
Signed-off-by: Johannes Berg

mac80211: add max lossless throughput per rate

2015-04-01T18:44:32+00:00

This patch adds the new statistic "maximum possible lossless
throughput" to Minstrels and Minstrel-HTs rc_stats (in debugfs). This
enables comprehensive comparison between current per-rate throughput
and max. achievable per-rate throughput.

Signed-off-by: Thomas Huehn 
Acked-by: Felix Fietkau 
Signed-off-by: Johannes Berg

mac80211: restructure per-rate throughput calculation into function

2015-04-01T18:44:32+00:00

This patch moves Minstrels and Minstrel-HTs per-rate throughput
calculation (EWMA(thr)) into a dedicated function to be called.
Therefore the variable "unsigned int cur_tp" within struct
"minstrel_rate_stats" becomes obsolete.  and is removed to free
up its space.

Signed-off-by: Thomas Huehn 
Acked-by: Felix Fietkau 
Signed-off-by: Johannes Berg