mac80211: minstrel: remove cur_prob from debugfs

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 <nbd@nbd.name>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/mac80211/rc80211_minstrel.c b/net/mac80211/rc80211_minstrel.c
index 14c5ba3a1b1c6c3b139729f8921ec01ef1b03d3d..a284ea08f0487f0274ea80439c13357ab58cdd16 100644 (file)
--- a/net/mac80211/rc80211_minstrel.c
+++ b/net/mac80211/rc80211_minstrel.c
@@ -159,21 +159,23 @@ minstrel_update_rates(struct minstrel_priv *mp, struct minstrel_sta_info *mi)
 void
 minstrel_calc_rate_stats(struct minstrel_rate_stats *mrs)
 {
+       unsigned int cur_prob;
+
        if (unlikely(mrs->attempts > 0)) {
                mrs->sample_skipped = 0;
-               mrs->cur_prob = MINSTREL_FRAC(mrs->success, mrs->attempts);
+               cur_prob = MINSTREL_FRAC(mrs->success, mrs->attempts);
                if (unlikely(!mrs->att_hist)) {
-                       mrs->prob_ewma = mrs->cur_prob;
+                       mrs->prob_ewma = cur_prob;
                } else {
                        /* update exponential weighted moving variance */
                        mrs->prob_ewmsd = minstrel_ewmsd(mrs->prob_ewmsd,
-                                                        mrs->cur_prob,
+                                                        cur_prob,
                                                         mrs->prob_ewma,
                                                         EWMA_LEVEL);
 
                        /*update exponential weighted moving avarage */
                        mrs->prob_ewma = minstrel_ewma(mrs->prob_ewma,
-                                                      mrs->cur_prob,
+                                                      cur_prob,
                                                       EWMA_LEVEL);
                }
                mrs->att_hist += mrs->attempts;

diff --git a/net/mac80211/rc80211_minstrel.h b/net/mac80211/rc80211_minstrel.h
index 209961cbb7e8ef41f896c93d1de3114ee96ce621..94b89b1b406c10b817f1641597191ef176711f58 100644 (file)
--- a/net/mac80211/rc80211_minstrel.h
+++ b/net/mac80211/rc80211_minstrel.h
@@ -62,10 +62,8 @@ struct minstrel_rate_stats {
        u32 att_hist, succ_hist;
 
        /* statistis of packet delivery probability
-        *  cur_prob  - current prob within last update intervall
         *  prob_ewma - exponential weighted moving average of prob
         *  prob_ewmsd - exp. weighted moving standard deviation of prob */
-       unsigned int cur_prob;
        unsigned int prob_ewma;
        u16 prob_ewmsd;
 

diff --git a/net/mac80211/rc80211_minstrel_debugfs.c b/net/mac80211/rc80211_minstrel_debugfs.c
index 820b0abc9c0d6f7662cf7a98cc497b310d1281e3..ca0bafd6a44e8f17898c8e3e6f6d43e8011a3052 100644 (file)
--- a/net/mac80211/rc80211_minstrel_debugfs.c
+++ b/net/mac80211/rc80211_minstrel_debugfs.c
@@ -75,7 +75,7 @@ minstrel_stats_open(struct inode *inode, struct file *file)
 {
        struct minstrel_sta_info *mi = inode->i_private;
        struct minstrel_debugfs_info *ms;
-       unsigned int i, tp_max, tp_avg, prob, eprob;
+       unsigned int i, tp_max, tp_avg, eprob;
        char *p;
 
        ms = kmalloc(2048, GFP_KERNEL);
@@ -86,9 +86,9 @@ minstrel_stats_open(struct inode *inode, struct file *file)
        p = ms->buf;
        p += sprintf(p, "\n");
        p += sprintf(p,
-                    "best   __________rate_________    ________statistics________    ________last_______    ______sum-of________\n");
+                    "best   __________rate_________    ________statistics________    ____last_____    ______sum-of________\n");
        p += sprintf(p,
-                    "rate  [name idx airtime max_tp]  [avg(tp) avg(prob) sd(prob)]  [prob.|retry|suc|att]  [#success | #attempts]\n");
+                    "rate  [name idx airtime max_tp]  [avg(tp) avg(prob) sd(prob)]  [retry|suc|att]  [#success | #attempts]\n");
 
        for (i = 0; i < mi->n_rates; i++) {
                struct minstrel_rate *mr = &mi->r[i];
@@ -107,17 +107,15 @@ 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);
-               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.%1u %3u   %3u %-3u   "
+                               "     %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,
                                mrs->last_attempts,
@@ -148,7 +146,7 @@ minstrel_stats_csv_open(struct inode *inode, struct file *file)
 {
        struct minstrel_sta_info *mi = inode->i_private;
        struct minstrel_debugfs_info *ms;
-       unsigned int i, tp_max, tp_avg, prob, eprob;
+       unsigned int i, tp_max, tp_avg, eprob;
        char *p;
 
        ms = kmalloc(2048, GFP_KERNEL);
@@ -175,16 +173,14 @@ 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);
-               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,%u,%u,"
+               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 / 10, prob % 10,
                                mrs->retry_count,
                                mrs->last_success,
                                mrs->last_attempts,

diff --git a/net/mac80211/rc80211_minstrel_ht_debugfs.c b/net/mac80211/rc80211_minstrel_ht_debugfs.c
index 1942d4b3cd186037e24100e8df873fcce513f24d..0cecd23bb8349ff267fb28bcef55e64cb2fa819d 100644 (file)
--- a/net/mac80211/rc80211_minstrel_ht_debugfs.c
+++ b/net/mac80211/rc80211_minstrel_ht_debugfs.c
@@ -19,7 +19,7 @@ static char *
 minstrel_ht_stats_dump(struct minstrel_ht_sta *mi, int i, char *p)
 {
        const struct mcs_group *mg;
-       unsigned int j, tp_max, tp_avg, prob, eprob, tx_time;
+       unsigned int j, tp_max, tp_avg, eprob, tx_time;
        char htmode = '2';
        char gimode = 'L';
        u32 gflags;
@@ -83,17 +83,15 @@ minstrel_ht_stats_dump(struct minstrel_ht_sta *mi, int i, char *p)
 
                tp_max = minstrel_ht_get_tp_avg(mi, i, j, MINSTREL_FRAC(100, 100));
                tp_avg = minstrel_ht_get_tp_avg(mi, i, j, mrs->prob_ewma);
-               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.%1u %3u   %3u %-3u   "
+                               "     %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,
                                mrs->last_attempts,
@@ -130,9 +128,9 @@ minstrel_ht_stats_open(struct inode *inode, struct file *file)
 
        p += sprintf(p, "\n");
        p += sprintf(p,
-                    "              best   ____________rate__________    ________statistics________    ________last_______    ______sum-of________\n");
+                    "              best   ____________rate__________    ________statistics________    _____last____    ______sum-of________\n");
        p += sprintf(p,
-                    "mode guard #  rate  [name   idx airtime  max_tp]  [avg(tp) avg(prob) sd(prob)]  [prob.|retry|suc|att]  [#success | #attempts]\n");
+                    "mode guard #  rate  [name   idx airtime  max_tp]  [avg(tp) avg(prob) sd(prob)]  [retry|suc|att]  [#success | #attempts]\n");
 
        p = minstrel_ht_stats_dump(mi, MINSTREL_CCK_GROUP, p);
        for (i = 0; i < MINSTREL_CCK_GROUP; i++)
@@ -165,7 +163,7 @@ static char *
 minstrel_ht_stats_csv_dump(struct minstrel_ht_sta *mi, int i, char *p)
 {
        const struct mcs_group *mg;
-       unsigned int j, tp_max, tp_avg, prob, eprob, tx_time;
+       unsigned int j, tp_max, tp_avg, eprob, tx_time;
        char htmode = '2';
        char gimode = 'L';
        u32 gflags;
@@ -226,16 +224,14 @@ minstrel_ht_stats_csv_dump(struct minstrel_ht_sta *mi, int i, char *p)
 
                tp_max = minstrel_ht_get_tp_avg(mi, i, j, MINSTREL_FRAC(100, 100));
                tp_avg = minstrel_ht_get_tp_avg(mi, i, j, mrs->prob_ewma);
-               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,%u,"
+               p += sprintf(p, "%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,
                                mrs->last_attempts,