diff options
| author | Thomas Huehn <thomas@net.t-labs.tu-berlin.de> | 2015-03-24 21:09:43 +0100 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2015-04-01 20:44:33 +0200 |
| commit | 5f919abc76fc3de1e5965ea03c925f7563c7fc15 (patch) | |
| tree | 8ed67f827d3b66cbfb140c66d8cd2d0f115633a6 /net/mac80211/rc80211_minstrel_ht_debugfs.c | |
| parent | ade6d4a2ec57d258bc181a155288c267dd8cf094 (diff) | |
| download | linux-5f919abc76fc3de1e5965ea03c925f7563c7fc15.tar.bz2 | |
mac80211: add standard deviation to Minstrel stats
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 <thomas@net.t-labs.tu-berlin.de>
Acked-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211/rc80211_minstrel_ht_debugfs.c')
| -rw-r--r-- | net/mac80211/rc80211_minstrel_ht_debugfs.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/net/mac80211/rc80211_minstrel_ht_debugfs.c b/net/mac80211/rc80211_minstrel_ht_debugfs.c index 135ed39790c0..6822ce0f95e5 100644 --- a/net/mac80211/rc80211_minstrel_ht_debugfs.c +++ b/net/mac80211/rc80211_minstrel_ht_debugfs.c @@ -86,11 +86,13 @@ minstrel_ht_stats_dump(struct minstrel_ht_sta *mi, int i, char *p) prob = MINSTREL_TRUNC(mrs->cur_prob * 1000); eprob = MINSTREL_TRUNC(mrs->prob_ewma * 1000); - p += sprintf(p, "%4u.%1u %4u.%1u %3u.%1u %3u.%1u " - "%3u %3u %-3u %9llu %-9llu\n", + p += sprintf(p, "%4u.%1u %4u.%1u %3u.%1u %3u.%1u" + " %3u.%1u %3u %3u %-3u " + "%9llu %-9llu\n", tp_max / 10, tp_max % 10, tp_avg / 10, tp_avg % 10, eprob / 10, eprob % 10, + mrs->prob_ewmsd / 10, mrs->prob_ewmsd % 10, prob / 10, prob % 10, mrs->retry_count, mrs->last_success, @@ -128,10 +130,10 @@ minstrel_ht_stats_open(struct inode *inode, struct file *file) p += sprintf(p, "\n"); p += sprintf(p, " best ____________rate__________ " - "__statistics__ ________last_______ " + "______statistics______ ________last_______ " "______sum-of________\n"); p += sprintf(p, "mode guard # rate [name idx airtime max_tp] " - "[ ø(tp) ø(prob)] [prob.|retry|suc|att] [#success | " + "[ ø(tp) ø(prob) sd(prob)] [prob.|retry|suc|att] [#success | " "#attempts]\n"); p = minstrel_ht_stats_dump(mi, MINSTREL_CCK_GROUP, p); @@ -229,10 +231,12 @@ minstrel_ht_stats_csv_dump(struct minstrel_ht_sta *mi, int i, char *p) prob = MINSTREL_TRUNC(mrs->cur_prob * 1000); eprob = MINSTREL_TRUNC(mrs->prob_ewma * 1000); - p += sprintf(p, "%u.%u,%u.%u,%u.%u,%u.%u,%u,%u,%u,%llu,%llu,", + p += sprintf(p, "%u.%u,%u.%u,%u.%u,%u.%u,%u.%u,%u,%u," + "%u,%llu,%llu,", tp_max / 10, tp_max % 10, tp_avg / 10, tp_avg % 10, eprob / 10, eprob % 10, + mrs->prob_ewmsd / 10, mrs->prob_ewmsd % 10, prob / 10, prob % 10, mrs->retry_count, mrs->last_success, |