diff options
Diffstat (limited to 'package/kernel/mac80211/patches/subsys/364-mac80211-minstrel_ht-rename-prob_ewma-to-prob_avg-us.patch')
-rw-r--r-- | package/kernel/mac80211/patches/subsys/364-mac80211-minstrel_ht-rename-prob_ewma-to-prob_avg-us.patch | 437 |
1 files changed, 437 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/subsys/364-mac80211-minstrel_ht-rename-prob_ewma-to-prob_avg-us.patch b/package/kernel/mac80211/patches/subsys/364-mac80211-minstrel_ht-rename-prob_ewma-to-prob_avg-us.patch new file mode 100644 index 0000000000..c919643505 --- /dev/null +++ b/package/kernel/mac80211/patches/subsys/364-mac80211-minstrel_ht-rename-prob_ewma-to-prob_avg-us.patch @@ -0,0 +1,437 @@ +From: Felix Fietkau <nbd@nbd.name> +Date: Tue, 8 Oct 2019 18:54:46 +0200 +Subject: [PATCH] mac80211: minstrel_ht: rename prob_ewma to prob_avg, use it + for the new average + +Reduces per-rate data structure size + +Signed-off-by: Felix Fietkau <nbd@nbd.name> +--- + +--- a/net/mac80211/rc80211_minstrel.c ++++ b/net/mac80211/rc80211_minstrel.c +@@ -70,7 +70,7 @@ rix_to_ndx(struct minstrel_sta_info *mi, + } + + /* return current EMWA throughput */ +-int minstrel_get_tp_avg(struct minstrel_rate *mr, int prob_ewma) ++int minstrel_get_tp_avg(struct minstrel_rate *mr, int prob_avg) + { + int usecs; + +@@ -79,13 +79,13 @@ int minstrel_get_tp_avg(struct minstrel_ + usecs = 1000000; + + /* reset thr. below 10% success */ +- if (mr->stats.prob_ewma < MINSTREL_FRAC(10, 100)) ++ if (mr->stats.prob_avg < MINSTREL_FRAC(10, 100)) + return 0; + +- if (prob_ewma > MINSTREL_FRAC(90, 100)) ++ if (prob_avg > MINSTREL_FRAC(90, 100)) + return MINSTREL_TRUNC(100000 * (MINSTREL_FRAC(90, 100) / usecs)); + else +- return MINSTREL_TRUNC(100000 * (prob_ewma / usecs)); ++ return MINSTREL_TRUNC(100000 * (prob_avg / usecs)); + } + + /* find & sort topmost throughput rates */ +@@ -98,8 +98,8 @@ minstrel_sort_best_tp_rates(struct minst + + for (j = MAX_THR_RATES; j > 0; --j) { + tmp_mrs = &mi->r[tp_list[j - 1]].stats; +- if (minstrel_get_tp_avg(&mi->r[i], cur_mrs->prob_ewma) <= +- minstrel_get_tp_avg(&mi->r[tp_list[j - 1]], tmp_mrs->prob_ewma)) ++ if (minstrel_get_tp_avg(&mi->r[i], cur_mrs->prob_avg) <= ++ minstrel_get_tp_avg(&mi->r[tp_list[j - 1]], tmp_mrs->prob_avg)) + break; + } + +@@ -166,21 +166,21 @@ minstrel_calc_rate_stats(struct minstrel + mrs->sample_skipped = 0; + cur_prob = MINSTREL_FRAC(mrs->success, mrs->attempts); + if (mp->new_avg) { +- mrs->prob_ewma = minstrel_filter_avg_add(&mrs->avg, +- cur_prob); ++ minstrel_filter_avg_add(&mrs->prob_avg, ++ &mrs->prob_avg_1, cur_prob); + } else if (unlikely(!mrs->att_hist)) { +- mrs->prob_ewma = cur_prob; ++ mrs->prob_avg = cur_prob; + } else { + /* update exponential weighted moving variance */ + mrs->prob_ewmv = minstrel_ewmv(mrs->prob_ewmv, + cur_prob, +- mrs->prob_ewma, ++ mrs->prob_avg, + EWMA_LEVEL); + + /*update exponential weighted moving avarage */ +- mrs->prob_ewma = minstrel_ewma(mrs->prob_ewma, +- cur_prob, +- EWMA_LEVEL); ++ mrs->prob_avg = minstrel_ewma(mrs->prob_avg, ++ cur_prob, ++ EWMA_LEVEL); + } + mrs->att_hist += mrs->attempts; + mrs->succ_hist += mrs->success; +@@ -214,8 +214,8 @@ minstrel_update_stats(struct minstrel_pr + + /* Sample less often below the 10% chance of success. + * Sample less often above the 95% chance of success. */ +- if (mrs->prob_ewma > MINSTREL_FRAC(95, 100) || +- mrs->prob_ewma < MINSTREL_FRAC(10, 100)) { ++ if (mrs->prob_avg > MINSTREL_FRAC(95, 100) || ++ mrs->prob_avg < MINSTREL_FRAC(10, 100)) { + mr->adjusted_retry_count = mrs->retry_count >> 1; + if (mr->adjusted_retry_count > 2) + mr->adjusted_retry_count = 2; +@@ -235,14 +235,14 @@ minstrel_update_stats(struct minstrel_pr + * choose the maximum throughput rate as max_prob_rate + * (2) if all success probabilities < 95%, the rate with + * highest success probability is chosen as max_prob_rate */ +- if (mrs->prob_ewma >= MINSTREL_FRAC(95, 100)) { +- tmp_cur_tp = minstrel_get_tp_avg(mr, mrs->prob_ewma); ++ if (mrs->prob_avg >= MINSTREL_FRAC(95, 100)) { ++ tmp_cur_tp = minstrel_get_tp_avg(mr, mrs->prob_avg); + tmp_prob_tp = minstrel_get_tp_avg(&mi->r[tmp_prob_rate], +- tmp_mrs->prob_ewma); ++ tmp_mrs->prob_avg); + if (tmp_cur_tp >= tmp_prob_tp) + tmp_prob_rate = i; + } else { +- if (mrs->prob_ewma >= tmp_mrs->prob_ewma) ++ if (mrs->prob_avg >= tmp_mrs->prob_avg) + tmp_prob_rate = i; + } + } +@@ -436,7 +436,7 @@ minstrel_get_rate(void *priv, struct iee + * has a probability of >95%, we shouldn't be attempting + * to use it, as this only wastes precious airtime */ + if (!mrr_capable && +- (mi->r[ndx].stats.prob_ewma > MINSTREL_FRAC(95, 100))) ++ (mi->r[ndx].stats.prob_avg > MINSTREL_FRAC(95, 100))) + return; + + mi->prev_sample = true; +@@ -587,7 +587,7 @@ static u32 minstrel_get_expected_through + * computing cur_tp + */ + tmp_mrs = &mi->r[idx].stats; +- tmp_cur_tp = minstrel_get_tp_avg(&mi->r[idx], tmp_mrs->prob_ewma) * 10; ++ tmp_cur_tp = minstrel_get_tp_avg(&mi->r[idx], tmp_mrs->prob_avg) * 10; + tmp_cur_tp = tmp_cur_tp * 1200 * 8 / 1024; + + return tmp_cur_tp; +--- a/net/mac80211/rc80211_minstrel.h ++++ b/net/mac80211/rc80211_minstrel.h +@@ -63,14 +63,10 @@ minstrel_ewmv(int old_ewmv, int cur_prob + return weight * (old_ewmv + MINSTREL_TRUNC(diff * incr)) / EWMA_DIV; + } + +-struct minstrel_avg_ctx { +- s32 prev[2]; +-}; +- +-static inline int minstrel_filter_avg_add(struct minstrel_avg_ctx *ctx, s32 in) ++static inline int minstrel_filter_avg_add(u16 *prev_1, u16 *prev_2, s32 in) + { +- s32 out_1 = ctx->prev[0]; +- s32 out_2 = ctx->prev[1]; ++ s32 out_1 = *prev_1; ++ s32 out_2 = *prev_2; + s32 val; + + if (!in) +@@ -92,8 +88,8 @@ static inline int minstrel_filter_avg_ad + val = 1; + + out: +- ctx->prev[1] = out_1; +- ctx->prev[0] = val; ++ *prev_2 = out_1; ++ *prev_1 = val; + + return val; + } +@@ -106,14 +102,15 @@ struct minstrel_rate_stats { + /* total attempts/success counters */ + u32 att_hist, succ_hist; + +- struct minstrel_avg_ctx avg; +- + /* statistis of packet delivery probability + * prob_ewma - exponential weighted moving average of prob + * prob_ewmsd - exp. weighted moving standard deviation of prob */ +- u16 prob_ewma; + u16 prob_ewmv; + ++ /* prob_avg - moving average of prob */ ++ u16 prob_avg; ++ u16 prob_avg_1; ++ + /* maximum retry counts */ + u8 retry_count; + u8 retry_count_rtscts; +@@ -208,7 +205,7 @@ void minstrel_add_sta_debugfs(void *priv + /* Recalculate success probabilities and counters for a given rate using EWMA */ + void minstrel_calc_rate_stats(struct minstrel_priv *mp, + struct minstrel_rate_stats *mrs); +-int minstrel_get_tp_avg(struct minstrel_rate *mr, int prob_ewma); ++int minstrel_get_tp_avg(struct minstrel_rate *mr, int prob_avg); + + /* debugfs */ + int minstrel_stats_open(struct inode *inode, struct file *file); +--- a/net/mac80211/rc80211_minstrel_debugfs.c ++++ b/net/mac80211/rc80211_minstrel_debugfs.c +@@ -91,8 +91,9 @@ minstrel_stats_open(struct inode *inode, + p += sprintf(p, "%6u ", mr->perfect_tx_time); + + 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); ++ tp_avg = minstrel_get_tp_avg(mr, mrs->prob_avg); ++ eprob = MINSTREL_TRUNC(mrs->prob_avg * 1000); ++ + prob_ewmsd = minstrel_get_ewmsd10(mrs); + + p += sprintf(p, "%4u.%1u %4u.%1u %3u.%1u %3u.%1u" +@@ -151,8 +152,8 @@ minstrel_stats_csv_open(struct inode *in + p += sprintf(p, "%u,",mr->perfect_tx_time); + + 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); ++ tp_avg = minstrel_get_tp_avg(mr, mrs->prob_avg); ++ eprob = MINSTREL_TRUNC(mrs->prob_avg * 1000); + prob_ewmsd = minstrel_get_ewmsd10(mrs); + + p += sprintf(p, "%u.%u,%u.%u,%u.%u,%u.%u,%u,%u,%u," +--- a/net/mac80211/rc80211_minstrel_ht.c ++++ b/net/mac80211/rc80211_minstrel_ht.c +@@ -313,12 +313,12 @@ minstrel_ht_avg_ampdu_len(struct minstre + */ + int + minstrel_ht_get_tp_avg(struct minstrel_ht_sta *mi, int group, int rate, +- int prob_ewma) ++ int prob_avg) + { + unsigned int nsecs = 0; + + /* do not account throughput if sucess prob is below 10% */ +- if (prob_ewma < MINSTREL_FRAC(10, 100)) ++ if (prob_avg < MINSTREL_FRAC(10, 100)) + return 0; + + if (group != MINSTREL_CCK_GROUP) +@@ -332,11 +332,11 @@ minstrel_ht_get_tp_avg(struct minstrel_h + * account for collision related packet error rate fluctuation + * (prob is scaled - see MINSTREL_FRAC above) + */ +- if (prob_ewma > MINSTREL_FRAC(90, 100)) ++ if (prob_avg > MINSTREL_FRAC(90, 100)) + return MINSTREL_TRUNC(100000 * ((MINSTREL_FRAC(90, 100) * 1000) + / nsecs)); + else +- return MINSTREL_TRUNC(100000 * ((prob_ewma * 1000) / nsecs)); ++ return MINSTREL_TRUNC(100000 * ((prob_avg * 1000) / nsecs)); + } + + /* +@@ -356,13 +356,13 @@ minstrel_ht_sort_best_tp_rates(struct mi + + cur_group = index / MCS_GROUP_RATES; + cur_idx = index % MCS_GROUP_RATES; +- cur_prob = mi->groups[cur_group].rates[cur_idx].prob_ewma; ++ cur_prob = mi->groups[cur_group].rates[cur_idx].prob_avg; + cur_tp_avg = minstrel_ht_get_tp_avg(mi, cur_group, cur_idx, cur_prob); + + do { + tmp_group = tp_list[j - 1] / MCS_GROUP_RATES; + tmp_idx = tp_list[j - 1] % MCS_GROUP_RATES; +- tmp_prob = mi->groups[tmp_group].rates[tmp_idx].prob_ewma; ++ tmp_prob = mi->groups[tmp_group].rates[tmp_idx].prob_avg; + tmp_tp_avg = minstrel_ht_get_tp_avg(mi, tmp_group, tmp_idx, + tmp_prob); + if (cur_tp_avg < tmp_tp_avg || +@@ -399,7 +399,7 @@ minstrel_ht_set_best_prob_rate(struct mi + + tmp_group = mi->max_prob_rate / MCS_GROUP_RATES; + tmp_idx = mi->max_prob_rate % MCS_GROUP_RATES; +- tmp_prob = mi->groups[tmp_group].rates[tmp_idx].prob_ewma; ++ tmp_prob = mi->groups[tmp_group].rates[tmp_idx].prob_avg; + tmp_tp_avg = minstrel_ht_get_tp_avg(mi, tmp_group, tmp_idx, tmp_prob); + + /* if max_tp_rate[0] is from MCS_GROUP max_prob_rate get selected from +@@ -411,11 +411,11 @@ minstrel_ht_set_best_prob_rate(struct mi + + max_gpr_group = mg->max_group_prob_rate / MCS_GROUP_RATES; + max_gpr_idx = mg->max_group_prob_rate % MCS_GROUP_RATES; +- max_gpr_prob = mi->groups[max_gpr_group].rates[max_gpr_idx].prob_ewma; ++ max_gpr_prob = mi->groups[max_gpr_group].rates[max_gpr_idx].prob_avg; + +- if (mrs->prob_ewma > MINSTREL_FRAC(75, 100)) { ++ if (mrs->prob_avg > MINSTREL_FRAC(75, 100)) { + cur_tp_avg = minstrel_ht_get_tp_avg(mi, cur_group, cur_idx, +- mrs->prob_ewma); ++ mrs->prob_avg); + if (cur_tp_avg > tmp_tp_avg) + mi->max_prob_rate = index; + +@@ -425,9 +425,9 @@ minstrel_ht_set_best_prob_rate(struct mi + if (cur_tp_avg > max_gpr_tp_avg) + mg->max_group_prob_rate = index; + } else { +- if (mrs->prob_ewma > tmp_prob) ++ if (mrs->prob_avg > tmp_prob) + mi->max_prob_rate = index; +- if (mrs->prob_ewma > max_gpr_prob) ++ if (mrs->prob_avg > max_gpr_prob) + mg->max_group_prob_rate = index; + } + } +@@ -449,12 +449,12 @@ minstrel_ht_assign_best_tp_rates(struct + + tmp_group = tmp_cck_tp_rate[0] / MCS_GROUP_RATES; + tmp_idx = tmp_cck_tp_rate[0] % MCS_GROUP_RATES; +- tmp_prob = mi->groups[tmp_group].rates[tmp_idx].prob_ewma; ++ tmp_prob = mi->groups[tmp_group].rates[tmp_idx].prob_avg; + tmp_cck_tp = minstrel_ht_get_tp_avg(mi, tmp_group, tmp_idx, tmp_prob); + + tmp_group = tmp_mcs_tp_rate[0] / MCS_GROUP_RATES; + tmp_idx = tmp_mcs_tp_rate[0] % MCS_GROUP_RATES; +- tmp_prob = mi->groups[tmp_group].rates[tmp_idx].prob_ewma; ++ tmp_prob = mi->groups[tmp_group].rates[tmp_idx].prob_avg; + tmp_mcs_tp = minstrel_ht_get_tp_avg(mi, tmp_group, tmp_idx, tmp_prob); + + if (tmp_cck_tp_rate && tmp_cck_tp > tmp_mcs_tp) { +@@ -485,7 +485,7 @@ minstrel_ht_prob_rate_reduce_streams(str + continue; + + tmp_idx = mg->max_group_prob_rate % MCS_GROUP_RATES; +- tmp_prob = mi->groups[group].rates[tmp_idx].prob_ewma; ++ tmp_prob = mi->groups[group].rates[tmp_idx].prob_avg; + + if (tmp_tp < minstrel_ht_get_tp_avg(mi, group, tmp_idx, tmp_prob) && + (minstrel_mcs_groups[group].streams < tmp_max_streams)) { +@@ -590,7 +590,7 @@ minstrel_ht_rate_sample_switch(struct mi + * If that fails, look again for a rate that is at least as fast + */ + mrs = minstrel_get_ratestats(mi, mi->max_tp_rate[0]); +- faster_rate = mrs->prob_ewma > MINSTREL_FRAC(75, 100); ++ faster_rate = mrs->prob_avg > MINSTREL_FRAC(75, 100); + minstrel_ht_find_probe_rates(mi, rates, &n_rates, faster_rate); + if (!n_rates && faster_rate) + minstrel_ht_find_probe_rates(mi, rates, &n_rates, false); +@@ -705,7 +705,7 @@ minstrel_ht_update_stats(struct minstrel + mrs = &mg->rates[i]; + mrs->retry_updated = false; + minstrel_calc_rate_stats(mp, mrs); +- cur_prob = mrs->prob_ewma; ++ cur_prob = mrs->prob_avg; + + if (minstrel_ht_get_tp_avg(mi, group, i, cur_prob) == 0) + continue; +@@ -979,7 +979,7 @@ minstrel_calc_retransmit(struct minstrel + unsigned int overhead = 0, overhead_rtscts = 0; + + mrs = minstrel_get_ratestats(mi, index); +- if (mrs->prob_ewma < MINSTREL_FRAC(1, 10)) { ++ if (mrs->prob_avg < MINSTREL_FRAC(1, 10)) { + mrs->retry_count = 1; + mrs->retry_count_rtscts = 1; + return; +@@ -1036,7 +1036,7 @@ minstrel_ht_set_rate(struct minstrel_pri + if (!mrs->retry_updated) + minstrel_calc_retransmit(mp, mi, index); + +- if (mrs->prob_ewma < MINSTREL_FRAC(20, 100) || !mrs->retry_count) { ++ if (mrs->prob_avg < MINSTREL_FRAC(20, 100) || !mrs->retry_count) { + ratetbl->rate[offset].count = 2; + ratetbl->rate[offset].count_rts = 2; + ratetbl->rate[offset].count_cts = 2; +@@ -1070,11 +1070,11 @@ minstrel_ht_set_rate(struct minstrel_pri + } + + static inline int +-minstrel_ht_get_prob_ewma(struct minstrel_ht_sta *mi, int rate) ++minstrel_ht_get_prob_avg(struct minstrel_ht_sta *mi, int rate) + { + int group = rate / MCS_GROUP_RATES; + rate %= MCS_GROUP_RATES; +- return mi->groups[group].rates[rate].prob_ewma; ++ return mi->groups[group].rates[rate].prob_avg; + } + + static int +@@ -1086,7 +1086,7 @@ minstrel_ht_get_max_amsdu_len(struct min + unsigned int duration; + + /* Disable A-MSDU if max_prob_rate is bad */ +- if (mi->groups[group].rates[rate].prob_ewma < MINSTREL_FRAC(50, 100)) ++ if (mi->groups[group].rates[rate].prob_avg < MINSTREL_FRAC(50, 100)) + return 1; + + duration = g->duration[rate]; +@@ -1109,7 +1109,7 @@ minstrel_ht_get_max_amsdu_len(struct min + * data packet size + */ + if (duration > MCS_DURATION(1, 0, 260) || +- (minstrel_ht_get_prob_ewma(mi, mi->max_tp_rate[0]) < ++ (minstrel_ht_get_prob_avg(mi, mi->max_tp_rate[0]) < + MINSTREL_FRAC(75, 100))) + return 3200; + +@@ -1216,7 +1216,7 @@ minstrel_get_sample_rate(struct minstrel + * rate, to avoid wasting airtime. + */ + sample_dur = minstrel_get_duration(sample_idx); +- if (mrs->prob_ewma > MINSTREL_FRAC(95, 100) || ++ if (mrs->prob_avg > MINSTREL_FRAC(95, 100) || + minstrel_get_duration(mi->max_prob_rate) * 3 < sample_dur) + return -1; + +@@ -1679,7 +1679,7 @@ static u32 minstrel_ht_get_expected_thro + + i = mi->max_tp_rate[0] / MCS_GROUP_RATES; + j = mi->max_tp_rate[0] % MCS_GROUP_RATES; +- prob = mi->groups[i].rates[j].prob_ewma; ++ prob = mi->groups[i].rates[j].prob_avg; + + /* convert tp_avg from pkt per second in kbps */ + tp_avg = minstrel_ht_get_tp_avg(mi, i, j, prob) * 10; +--- a/net/mac80211/rc80211_minstrel_ht.h ++++ b/net/mac80211/rc80211_minstrel_ht.h +@@ -122,6 +122,6 @@ struct minstrel_ht_sta_priv { + + void minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir); + int minstrel_ht_get_tp_avg(struct minstrel_ht_sta *mi, int group, int rate, +- int prob_ewma); ++ int prob_avg); + + #endif +--- a/net/mac80211/rc80211_minstrel_ht_debugfs.c ++++ b/net/mac80211/rc80211_minstrel_ht_debugfs.c +@@ -102,8 +102,8 @@ minstrel_ht_stats_dump(struct minstrel_h + p += sprintf(p, "%6u ", tx_time); + + 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); +- eprob = MINSTREL_TRUNC(mrs->prob_ewma * 1000); ++ tp_avg = minstrel_ht_get_tp_avg(mi, i, j, mrs->prob_avg); ++ eprob = MINSTREL_TRUNC(mrs->prob_avg * 1000); + prob_ewmsd = minstrel_get_ewmsd10(mrs); + + p += sprintf(p, "%4u.%1u %4u.%1u %3u.%1u %3u.%1u" +@@ -250,8 +250,8 @@ minstrel_ht_stats_csv_dump(struct minstr + p += sprintf(p, "%u,", tx_time); + + 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); +- eprob = MINSTREL_TRUNC(mrs->prob_ewma * 1000); ++ tp_avg = minstrel_ht_get_tp_avg(mi, i, j, mrs->prob_avg); ++ eprob = MINSTREL_TRUNC(mrs->prob_avg * 1000); + prob_ewmsd = minstrel_get_ewmsd10(mrs); + + p += sprintf(p, "%u.%u,%u.%u,%u.%u,%u.%u,%u,%u," |