lwn.git/net/mac80211/rc80211_minstrel.h, branch doc/4.8-fixes

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: reduce calculation costs of EWMA

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

This patch reduces the calculation costs of the EWMA macro from "2x multiplication and 1 addition" down to "1x multiplication and 2x additions". This slightly improves performance depending on the CPU architecture. 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

mac80211: improve Minstrel variable & function naming

2015-04-01T18:44:31+00:00

This patch ensures a consistent usage of variable names for type "minstrel_rate_stats" to be used as "mrs" and from type minstrel_rate as "mr" across both Minstrel & Minstrel-HT. In addition some variable and function names got changed to more meaningful ones. Signed-off-by: Thomas Huehn Acked-by: Felix Fietkau Signed-off-by: Johannes Berg

mac80211: unify Minstrel & Minstrel-HTs calculation of rate statistics

2015-04-01T18:44:31+00:00

This patch unifies the calculation of Minstrels and Minstrel-HTs per-rate statistic. The new common function minstrel_calc_rate_stats() is called when a statistic update is performed. Signed-off-by: Thomas Huehn Acked-by: Felix Fietkau Signed-off-by: Johannes Berg

mac80211: add new Minstrel statistic output via csv

2015-04-01T18:41:43+00:00

This patch adds a new debugfs file "rc_stats_csv" to output Minstrels statistics in a common csv format that is easy to parse. Signed-off-by: Thomas Huehn Signed-off-by: Stefan Venz Acked-by: Felix Fietkau [remove printing current time of day] Signed-off-by: Johannes Berg

mac80211: minstrel: reduce size of struct minstrel_rate_stats

2014-12-19T20:34:22+00:00

On minstrel_ht, the size of the per-sta struct is almost 18k, making it an order-3 allocation. A few fields inside the per-rate statistics are bigger than they need to be. This patch reduces the size enough to cut down the per-sta struct to about 13k (order-2 allocation). Signed-off-by: Felix Fietkau Signed-off-by: Johannes Berg

mac80211: Unify rate statistic variables between Minstrel & Minstrel_HT

2014-09-11T10:08:31+00:00

Minstrel and Mintrel_HT used there own structs to keep track of rate statistics. Unify those variables in struct minstrel_rate_states and move it to rc80211_minstrel.h for common usage. This is a clean-up patch to prepare Minstrel and Minstrel_HT codebase for upcoming TPC. Signed-off-by: Thomas Huehn Acked-by: Felix Fietkau Signed-off-by: Johannes Berg

mac80211: make rate control ops const

2014-02-04T20:48:21+00:00

Change the code to allow making all the rate control ops const, nothing ever needs to change them. Also change all drivers to make use of this and mark the ops const. Signed-off-by: Johannes Berg