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| author | Thomas Huehn | 2015-03-24 21:09:43 +0100 |
|---|---|---|
| committer | Johannes Berg | 2015-04-01 20:44:33 +0200 |
| commit | 5f919abc76fc3de1e5965ea03c925f7563c7fc15 (patch) | |
| tree | 8ed67f827d3b66cbfb140c66d8cd2d0f115633a6 /net/mac80211/rc80211_minstrel_debugfs.c | |
| parent | mac80211: reduce calculation costs of EWMA (diff) | |
| download | kernel-qcow2-linux-5f919abc76fc3de1e5965ea03c925f7563c7fc15.tar.gz kernel-qcow2-linux-5f919abc76fc3de1e5965ea03c925f7563c7fc15.tar.xz kernel-qcow2-linux-5f919abc76fc3de1e5965ea03c925f7563c7fc15.zip | |
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_debugfs.c')
| -rw-r--r-- | net/mac80211/rc80211_minstrel_debugfs.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/net/mac80211/rc80211_minstrel_debugfs.c b/net/mac80211/rc80211_minstrel_debugfs.c index 617b81f72226..1db5f7c3318a 100644 --- a/net/mac80211/rc80211_minstrel_debugfs.c +++ b/net/mac80211/rc80211_minstrel_debugfs.c @@ -85,10 +85,12 @@ minstrel_stats_open(struct inode *inode, struct file *file) file->private_data = ms; p = ms->buf; p += sprintf(p, "\n"); - p += sprintf(p, "best __________rate_________ __statistics__ " - "________last_______ ______sum-of________\n"); - p += sprintf(p, "rate [name idx airtime max_tp] [ ø(tp) ø(prob)] " - "[prob.|retry|suc|att] [#success | #attempts]\n"); + p += sprintf(p, "best __________rate_________ ______" + "statistics______ ________last_______ " + "______sum-of________\n"); + p += sprintf(p, "rate [name idx airtime max_tp] [ ø(tp) ø(prob) " + "sd(prob)] [prob.|retry|suc|att] " + "[#success | #attempts]\n"); for (i = 0; i < mi->n_rates; i++) { struct minstrel_rate *mr = &mi->r[i]; @@ -110,11 +112,13 @@ minstrel_stats_open(struct inode *inode, struct file *file) 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, @@ -176,11 +180,12 @@ minstrel_stats_csv_open(struct inode *inode, struct file *file) 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," + p += sprintf(p, "%u.%u,%u.%u,%u.%u,%u.%u,%u.%u,%u,%u,%u," "%llu,%llu,%d,%d\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, |