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| author | Felix Fietkau <nbd@nbd.name> | 2016-12-14 20:47:00 +0100 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2016-12-15 11:07:52 +0100 |
| commit | 4f0bc9c61bae9c74ffcf5dbdbd241cbf0ec3a44e (patch) | |
| tree | 663224eb02449823db0b3ccef21d8deb14867194 /net/mac80211/rc80211_minstrel_debugfs.c | |
| parent | 0217eefa64509d63fbe8d1205310bafb2355cf4d (diff) | |
| download | linux-4f0bc9c61bae9c74ffcf5dbdbd241cbf0ec3a44e.tar.gz linux-4f0bc9c61bae9c74ffcf5dbdbd241cbf0ec3a44e.tar.bz2 linux-4f0bc9c61bae9c74ffcf5dbdbd241cbf0ec3a44e.zip | |
mac80211: minstrel: store probability variance instead of standard deviation
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 <thomas.huehn@evernet-eg.de>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
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 | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/net/mac80211/rc80211_minstrel_debugfs.c b/net/mac80211/rc80211_minstrel_debugfs.c index ca0bafd6a44e..36fc971deb86 100644 --- a/net/mac80211/rc80211_minstrel_debugfs.c +++ b/net/mac80211/rc80211_minstrel_debugfs.c @@ -93,6 +93,7 @@ minstrel_stats_open(struct inode *inode, struct file *file) for (i = 0; i < mi->n_rates; i++) { struct minstrel_rate *mr = &mi->r[i]; struct minstrel_rate_stats *mrs = &mi->r[i].stats; + unsigned int prob_ewmsd; *(p++) = (i == mi->max_tp_rate[0]) ? 'A' : ' '; *(p++) = (i == mi->max_tp_rate[1]) ? 'B' : ' '; @@ -108,6 +109,7 @@ minstrel_stats_open(struct inode *inode, struct file *file) tp_max = minstrel_get_tp_avg(mr, MINSTREL_FRAC(100,100)); tp_avg = minstrel_get_tp_avg(mr, mrs->prob_ewma); eprob = MINSTREL_TRUNC(mrs->prob_ewma * 1000); + prob_ewmsd = minstrel_get_ewmsd10(mrs); p += sprintf(p, "%4u.%1u %4u.%1u %3u.%1u %3u.%1u" " %3u %3u %-3u " @@ -115,7 +117,7 @@ minstrel_stats_open(struct inode *inode, struct file *file) 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_ewmsd / 10, prob_ewmsd % 10, mrs->retry_count, mrs->last_success, mrs->last_attempts, @@ -159,6 +161,7 @@ minstrel_stats_csv_open(struct inode *inode, struct file *file) for (i = 0; i < mi->n_rates; i++) { struct minstrel_rate *mr = &mi->r[i]; struct minstrel_rate_stats *mrs = &mi->r[i].stats; + unsigned int prob_ewmsd; p += sprintf(p, "%s" ,((i == mi->max_tp_rate[0]) ? "A" : "")); p += sprintf(p, "%s" ,((i == mi->max_tp_rate[1]) ? "B" : "")); @@ -174,13 +177,14 @@ minstrel_stats_csv_open(struct inode *inode, struct file *file) tp_max = minstrel_get_tp_avg(mr, MINSTREL_FRAC(100,100)); tp_avg = minstrel_get_tp_avg(mr, mrs->prob_ewma); eprob = MINSTREL_TRUNC(mrs->prob_ewma * 1000); + prob_ewmsd = minstrel_get_ewmsd10(mrs); p += sprintf(p, "%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_ewmsd / 10, prob_ewmsd % 10, mrs->retry_count, mrs->last_success, mrs->last_attempts, |