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-rw-r--r--package/kernel/mac80211/patches/338-mac80211-minstrel-remove-cur_prob-from-debugfs.patch192
1 files changed, 192 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/338-mac80211-minstrel-remove-cur_prob-from-debugfs.patch b/package/kernel/mac80211/patches/338-mac80211-minstrel-remove-cur_prob-from-debugfs.patch
new file mode 100644
index 0000000000..f25b0a8a8c
--- /dev/null
+++ b/package/kernel/mac80211/patches/338-mac80211-minstrel-remove-cur_prob-from-debugfs.patch
@@ -0,0 +1,192 @@
+From: Felix Fietkau <nbd@nbd.name>
+Date: Wed, 14 Dec 2016 20:13:58 +0100
+Subject: [PATCH] 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>
+---
+
+--- a/net/mac80211/rc80211_minstrel.c
++++ b/net/mac80211/rc80211_minstrel.c
+@@ -159,21 +159,23 @@ minstrel_update_rates(struct minstrel_pr
+ 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;
+--- 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;
+
+--- 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 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,
+ 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,
+
+ 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 *in
+ {
+ 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 *in
+
+ 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,
+--- 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_h
+
+ 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 *ino
+
+ 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 minstr
+
+ 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,
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-29 16:17:28 +0000