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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> Link: https://lore.kernel.org/r/20191008171139.96476-3-nbd@nbd.name Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Felix Fietkau
Johannes Berg
parent
b1103d2567
commit
5f63afe028
@ -70,7 +70,7 @@ rix_to_ndx(struct minstrel_sta_info *mi, int rix)
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}
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/* return current EMWA throughput */
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int minstrel_get_tp_avg(struct minstrel_rate *mr, int prob_ewma)
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int minstrel_get_tp_avg(struct minstrel_rate *mr, int prob_avg)
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{
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int usecs;
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@ -79,13 +79,13 @@ int minstrel_get_tp_avg(struct minstrel_rate *mr, int prob_ewma)
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usecs = 1000000;
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/* reset thr. below 10% success */
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if (mr->stats.prob_ewma < MINSTREL_FRAC(10, 100))
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if (mr->stats.prob_avg < MINSTREL_FRAC(10, 100))
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return 0;
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if (prob_ewma > MINSTREL_FRAC(90, 100))
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if (prob_avg > MINSTREL_FRAC(90, 100))
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return MINSTREL_TRUNC(100000 * (MINSTREL_FRAC(90, 100) / usecs));
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else
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return MINSTREL_TRUNC(100000 * (prob_ewma / usecs));
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return MINSTREL_TRUNC(100000 * (prob_avg / usecs));
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}
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/* find & sort topmost throughput rates */
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@ -98,8 +98,8 @@ minstrel_sort_best_tp_rates(struct minstrel_sta_info *mi, int i, u8 *tp_list)
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for (j = MAX_THR_RATES; j > 0; --j) {
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tmp_mrs = &mi->r[tp_list[j - 1]].stats;
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if (minstrel_get_tp_avg(&mi->r[i], cur_mrs->prob_ewma) <=
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minstrel_get_tp_avg(&mi->r[tp_list[j - 1]], tmp_mrs->prob_ewma))
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if (minstrel_get_tp_avg(&mi->r[i], cur_mrs->prob_avg) <=
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minstrel_get_tp_avg(&mi->r[tp_list[j - 1]], tmp_mrs->prob_avg))
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break;
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}
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@ -166,15 +166,15 @@ minstrel_calc_rate_stats(struct minstrel_priv *mp,
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mrs->sample_skipped = 0;
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cur_prob = MINSTREL_FRAC(mrs->success, mrs->attempts);
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if (mp->new_avg) {
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mrs->prob_ewma = minstrel_filter_avg_add(&mrs->avg,
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cur_prob);
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minstrel_filter_avg_add(&mrs->prob_avg,
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&mrs->prob_avg_1, cur_prob);
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} else if (unlikely(!mrs->att_hist)) {
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mrs->prob_ewma = cur_prob;
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mrs->prob_avg = cur_prob;
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} else {
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/*update exponential weighted moving avarage */
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mrs->prob_ewma = minstrel_ewma(mrs->prob_ewma,
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cur_prob,
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EWMA_LEVEL);
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mrs->prob_avg = minstrel_ewma(mrs->prob_avg,
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cur_prob,
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EWMA_LEVEL);
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}
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mrs->att_hist += mrs->attempts;
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mrs->succ_hist += mrs->success;
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@ -208,8 +208,8 @@ minstrel_update_stats(struct minstrel_priv *mp, struct minstrel_sta_info *mi)
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/* Sample less often below the 10% chance of success.
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* Sample less often above the 95% chance of success. */
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if (mrs->prob_ewma > MINSTREL_FRAC(95, 100) ||
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mrs->prob_ewma < MINSTREL_FRAC(10, 100)) {
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if (mrs->prob_avg > MINSTREL_FRAC(95, 100) ||
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mrs->prob_avg < MINSTREL_FRAC(10, 100)) {
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mr->adjusted_retry_count = mrs->retry_count >> 1;
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if (mr->adjusted_retry_count > 2)
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mr->adjusted_retry_count = 2;
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@ -229,14 +229,14 @@ minstrel_update_stats(struct minstrel_priv *mp, struct minstrel_sta_info *mi)
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* choose the maximum throughput rate as max_prob_rate
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* (2) if all success probabilities < 95%, the rate with
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* highest success probability is chosen as max_prob_rate */
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if (mrs->prob_ewma >= MINSTREL_FRAC(95, 100)) {
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tmp_cur_tp = minstrel_get_tp_avg(mr, mrs->prob_ewma);
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if (mrs->prob_avg >= MINSTREL_FRAC(95, 100)) {
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tmp_cur_tp = minstrel_get_tp_avg(mr, mrs->prob_avg);
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tmp_prob_tp = minstrel_get_tp_avg(&mi->r[tmp_prob_rate],
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tmp_mrs->prob_ewma);
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tmp_mrs->prob_avg);
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if (tmp_cur_tp >= tmp_prob_tp)
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tmp_prob_rate = i;
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} else {
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if (mrs->prob_ewma >= tmp_mrs->prob_ewma)
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if (mrs->prob_avg >= tmp_mrs->prob_avg)
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tmp_prob_rate = i;
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}
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}
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@ -426,7 +426,7 @@ minstrel_get_rate(void *priv, struct ieee80211_sta *sta,
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* has a probability of >95%, we shouldn't be attempting
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* to use it, as this only wastes precious airtime */
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if (!mrr_capable &&
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(mi->r[ndx].stats.prob_ewma > MINSTREL_FRAC(95, 100)))
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(mi->r[ndx].stats.prob_avg > MINSTREL_FRAC(95, 100)))
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return;
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mi->prev_sample = true;
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@ -577,7 +577,7 @@ static u32 minstrel_get_expected_throughput(void *priv_sta)
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* computing cur_tp
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*/
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tmp_mrs = &mi->r[idx].stats;
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tmp_cur_tp = minstrel_get_tp_avg(&mi->r[idx], tmp_mrs->prob_ewma) * 10;
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tmp_cur_tp = minstrel_get_tp_avg(&mi->r[idx], tmp_mrs->prob_avg) * 10;
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tmp_cur_tp = tmp_cur_tp * 1200 * 8 / 1024;
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return tmp_cur_tp;
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@ -47,14 +47,10 @@ minstrel_ewma(int old, int new, int weight)
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return old + incr;
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}
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struct minstrel_avg_ctx {
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s32 prev[2];
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};
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static inline int minstrel_filter_avg_add(struct minstrel_avg_ctx *ctx, s32 in)
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static inline int minstrel_filter_avg_add(u16 *prev_1, u16 *prev_2, s32 in)
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{
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s32 out_1 = ctx->prev[0];
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s32 out_2 = ctx->prev[1];
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s32 out_1 = *prev_1;
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s32 out_2 = *prev_2;
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s32 val;
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if (!in)
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@ -76,8 +72,8 @@ static inline int minstrel_filter_avg_add(struct minstrel_avg_ctx *ctx, s32 in)
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val = 1;
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out:
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ctx->prev[1] = out_1;
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ctx->prev[0] = val;
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*prev_2 = out_1;
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*prev_1 = val;
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return val;
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}
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@ -90,10 +86,9 @@ struct minstrel_rate_stats {
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/* total attempts/success counters */
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u32 att_hist, succ_hist;
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struct minstrel_avg_ctx avg;
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/* prob_ewma - exponential weighted moving average of prob */
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u16 prob_ewma;
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/* prob_avg - moving average of prob */
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u16 prob_avg;
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u16 prob_avg_1;
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/* maximum retry counts */
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u8 retry_count;
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@ -181,7 +176,7 @@ void minstrel_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir);
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/* Recalculate success probabilities and counters for a given rate using EWMA */
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void minstrel_calc_rate_stats(struct minstrel_priv *mp,
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struct minstrel_rate_stats *mrs);
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int minstrel_get_tp_avg(struct minstrel_rate *mr, int prob_ewma);
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int minstrel_get_tp_avg(struct minstrel_rate *mr, int prob_avg);
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/* debugfs */
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int minstrel_stats_open(struct inode *inode, struct file *file);
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@ -90,8 +90,8 @@ minstrel_stats_open(struct inode *inode, struct file *file)
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p += sprintf(p, "%6u ", mr->perfect_tx_time);
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tp_max = minstrel_get_tp_avg(mr, MINSTREL_FRAC(100,100));
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tp_avg = minstrel_get_tp_avg(mr, mrs->prob_ewma);
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eprob = MINSTREL_TRUNC(mrs->prob_ewma * 1000);
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tp_avg = minstrel_get_tp_avg(mr, mrs->prob_avg);
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eprob = MINSTREL_TRUNC(mrs->prob_avg * 1000);
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p += sprintf(p, "%4u.%1u %4u.%1u %3u.%1u"
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" %3u %3u %-3u "
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@ -147,8 +147,8 @@ minstrel_stats_csv_open(struct inode *inode, struct file *file)
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p += sprintf(p, "%u,",mr->perfect_tx_time);
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tp_max = minstrel_get_tp_avg(mr, MINSTREL_FRAC(100,100));
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tp_avg = minstrel_get_tp_avg(mr, mrs->prob_ewma);
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eprob = MINSTREL_TRUNC(mrs->prob_ewma * 1000);
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tp_avg = minstrel_get_tp_avg(mr, mrs->prob_avg);
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eprob = MINSTREL_TRUNC(mrs->prob_avg * 1000);
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p += sprintf(p, "%u.%u,%u.%u,%u.%u,%u,%u,%u,"
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"%llu,%llu,%d,%d\n",
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@ -346,12 +346,12 @@ minstrel_ht_avg_ampdu_len(struct minstrel_ht_sta *mi)
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*/
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int
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minstrel_ht_get_tp_avg(struct minstrel_ht_sta *mi, int group, int rate,
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int prob_ewma)
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int prob_avg)
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{
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unsigned int nsecs = 0;
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/* do not account throughput if sucess prob is below 10% */
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if (prob_ewma < MINSTREL_FRAC(10, 100))
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if (prob_avg < MINSTREL_FRAC(10, 100))
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return 0;
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if (group != MINSTREL_CCK_GROUP)
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@ -365,11 +365,11 @@ minstrel_ht_get_tp_avg(struct minstrel_ht_sta *mi, int group, int rate,
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* account for collision related packet error rate fluctuation
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* (prob is scaled - see MINSTREL_FRAC above)
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*/
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if (prob_ewma > MINSTREL_FRAC(90, 100))
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if (prob_avg > MINSTREL_FRAC(90, 100))
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return MINSTREL_TRUNC(100000 * ((MINSTREL_FRAC(90, 100) * 1000)
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/ nsecs));
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else
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return MINSTREL_TRUNC(100000 * ((prob_ewma * 1000) / nsecs));
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return MINSTREL_TRUNC(100000 * ((prob_avg * 1000) / nsecs));
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}
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/*
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@ -389,13 +389,13 @@ minstrel_ht_sort_best_tp_rates(struct minstrel_ht_sta *mi, u16 index,
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cur_group = index / MCS_GROUP_RATES;
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cur_idx = index % MCS_GROUP_RATES;
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cur_prob = mi->groups[cur_group].rates[cur_idx].prob_ewma;
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cur_prob = mi->groups[cur_group].rates[cur_idx].prob_avg;
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cur_tp_avg = minstrel_ht_get_tp_avg(mi, cur_group, cur_idx, cur_prob);
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do {
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tmp_group = tp_list[j - 1] / MCS_GROUP_RATES;
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tmp_idx = tp_list[j - 1] % MCS_GROUP_RATES;
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tmp_prob = mi->groups[tmp_group].rates[tmp_idx].prob_ewma;
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tmp_prob = mi->groups[tmp_group].rates[tmp_idx].prob_avg;
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tmp_tp_avg = minstrel_ht_get_tp_avg(mi, tmp_group, tmp_idx,
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tmp_prob);
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if (cur_tp_avg < tmp_tp_avg ||
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@ -432,7 +432,7 @@ minstrel_ht_set_best_prob_rate(struct minstrel_ht_sta *mi, u16 index)
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tmp_group = mi->max_prob_rate / MCS_GROUP_RATES;
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tmp_idx = mi->max_prob_rate % MCS_GROUP_RATES;
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tmp_prob = mi->groups[tmp_group].rates[tmp_idx].prob_ewma;
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tmp_prob = mi->groups[tmp_group].rates[tmp_idx].prob_avg;
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tmp_tp_avg = minstrel_ht_get_tp_avg(mi, tmp_group, tmp_idx, tmp_prob);
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/* if max_tp_rate[0] is from MCS_GROUP max_prob_rate get selected from
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@ -444,11 +444,11 @@ minstrel_ht_set_best_prob_rate(struct minstrel_ht_sta *mi, u16 index)
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max_gpr_group = mg->max_group_prob_rate / MCS_GROUP_RATES;
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max_gpr_idx = mg->max_group_prob_rate % MCS_GROUP_RATES;
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max_gpr_prob = mi->groups[max_gpr_group].rates[max_gpr_idx].prob_ewma;
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max_gpr_prob = mi->groups[max_gpr_group].rates[max_gpr_idx].prob_avg;
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if (mrs->prob_ewma > MINSTREL_FRAC(75, 100)) {
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if (mrs->prob_avg > MINSTREL_FRAC(75, 100)) {
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cur_tp_avg = minstrel_ht_get_tp_avg(mi, cur_group, cur_idx,
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mrs->prob_ewma);
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mrs->prob_avg);
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if (cur_tp_avg > tmp_tp_avg)
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mi->max_prob_rate = index;
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@ -458,9 +458,9 @@ minstrel_ht_set_best_prob_rate(struct minstrel_ht_sta *mi, u16 index)
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if (cur_tp_avg > max_gpr_tp_avg)
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mg->max_group_prob_rate = index;
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} else {
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if (mrs->prob_ewma > tmp_prob)
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if (mrs->prob_avg > tmp_prob)
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mi->max_prob_rate = index;
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if (mrs->prob_ewma > max_gpr_prob)
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if (mrs->prob_avg > max_gpr_prob)
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mg->max_group_prob_rate = index;
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}
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}
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@ -482,12 +482,12 @@ minstrel_ht_assign_best_tp_rates(struct minstrel_ht_sta *mi,
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tmp_group = tmp_cck_tp_rate[0] / MCS_GROUP_RATES;
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tmp_idx = tmp_cck_tp_rate[0] % MCS_GROUP_RATES;
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tmp_prob = mi->groups[tmp_group].rates[tmp_idx].prob_ewma;
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tmp_prob = mi->groups[tmp_group].rates[tmp_idx].prob_avg;
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tmp_cck_tp = minstrel_ht_get_tp_avg(mi, tmp_group, tmp_idx, tmp_prob);
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tmp_group = tmp_mcs_tp_rate[0] / MCS_GROUP_RATES;
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tmp_idx = tmp_mcs_tp_rate[0] % MCS_GROUP_RATES;
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tmp_prob = mi->groups[tmp_group].rates[tmp_idx].prob_ewma;
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tmp_prob = mi->groups[tmp_group].rates[tmp_idx].prob_avg;
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tmp_mcs_tp = minstrel_ht_get_tp_avg(mi, tmp_group, tmp_idx, tmp_prob);
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if (tmp_cck_tp_rate && tmp_cck_tp > tmp_mcs_tp) {
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@ -518,7 +518,7 @@ minstrel_ht_prob_rate_reduce_streams(struct minstrel_ht_sta *mi)
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continue;
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tmp_idx = mg->max_group_prob_rate % MCS_GROUP_RATES;
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tmp_prob = mi->groups[group].rates[tmp_idx].prob_ewma;
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tmp_prob = mi->groups[group].rates[tmp_idx].prob_avg;
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if (tmp_tp < minstrel_ht_get_tp_avg(mi, group, tmp_idx, tmp_prob) &&
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(minstrel_mcs_groups[group].streams < tmp_max_streams)) {
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@ -623,7 +623,7 @@ minstrel_ht_rate_sample_switch(struct minstrel_priv *mp,
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* If that fails, look again for a rate that is at least as fast
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*/
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mrs = minstrel_get_ratestats(mi, mi->max_tp_rate[0]);
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faster_rate = mrs->prob_ewma > MINSTREL_FRAC(75, 100);
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faster_rate = mrs->prob_avg > MINSTREL_FRAC(75, 100);
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minstrel_ht_find_probe_rates(mi, rates, &n_rates, faster_rate);
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if (!n_rates && faster_rate)
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minstrel_ht_find_probe_rates(mi, rates, &n_rates, false);
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@ -738,7 +738,7 @@ minstrel_ht_update_stats(struct minstrel_priv *mp, struct minstrel_ht_sta *mi,
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mrs = &mg->rates[i];
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mrs->retry_updated = false;
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minstrel_calc_rate_stats(mp, mrs);
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cur_prob = mrs->prob_ewma;
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cur_prob = mrs->prob_avg;
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if (minstrel_ht_get_tp_avg(mi, group, i, cur_prob) == 0)
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continue;
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@ -1012,7 +1012,7 @@ minstrel_calc_retransmit(struct minstrel_priv *mp, struct minstrel_ht_sta *mi,
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unsigned int overhead = 0, overhead_rtscts = 0;
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mrs = minstrel_get_ratestats(mi, index);
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if (mrs->prob_ewma < MINSTREL_FRAC(1, 10)) {
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if (mrs->prob_avg < MINSTREL_FRAC(1, 10)) {
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mrs->retry_count = 1;
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mrs->retry_count_rtscts = 1;
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return;
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@ -1069,7 +1069,7 @@ minstrel_ht_set_rate(struct minstrel_priv *mp, struct minstrel_ht_sta *mi,
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if (!mrs->retry_updated)
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minstrel_calc_retransmit(mp, mi, index);
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if (mrs->prob_ewma < MINSTREL_FRAC(20, 100) || !mrs->retry_count) {
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if (mrs->prob_avg < MINSTREL_FRAC(20, 100) || !mrs->retry_count) {
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ratetbl->rate[offset].count = 2;
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ratetbl->rate[offset].count_rts = 2;
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ratetbl->rate[offset].count_cts = 2;
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@ -1103,11 +1103,11 @@ minstrel_ht_set_rate(struct minstrel_priv *mp, struct minstrel_ht_sta *mi,
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}
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static inline int
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minstrel_ht_get_prob_ewma(struct minstrel_ht_sta *mi, int rate)
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minstrel_ht_get_prob_avg(struct minstrel_ht_sta *mi, int rate)
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{
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int group = rate / MCS_GROUP_RATES;
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rate %= MCS_GROUP_RATES;
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return mi->groups[group].rates[rate].prob_ewma;
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return mi->groups[group].rates[rate].prob_avg;
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}
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static int
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@ -1119,7 +1119,7 @@ minstrel_ht_get_max_amsdu_len(struct minstrel_ht_sta *mi)
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unsigned int duration;
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/* Disable A-MSDU if max_prob_rate is bad */
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if (mi->groups[group].rates[rate].prob_ewma < MINSTREL_FRAC(50, 100))
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if (mi->groups[group].rates[rate].prob_avg < MINSTREL_FRAC(50, 100))
|
||||
return 1;
|
||||
|
||||
duration = g->duration[rate];
|
||||
@ -1142,7 +1142,7 @@ minstrel_ht_get_max_amsdu_len(struct minstrel_ht_sta *mi)
|
||||
* 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;
|
||||
|
||||
@ -1247,7 +1247,7 @@ minstrel_get_sample_rate(struct minstrel_priv *mp, struct minstrel_ht_sta *mi)
|
||||
* 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;
|
||||
|
||||
@ -1705,7 +1705,7 @@ static u32 minstrel_ht_get_expected_throughput(void *priv_sta)
|
||||
|
||||
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;
|
||||
|
||||
@ -119,6 +119,6 @@ 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
|
||||
|
||||
@ -98,8 +98,8 @@ minstrel_ht_stats_dump(struct minstrel_ht_sta *mi, int i, char *p)
|
||||
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);
|
||||
|
||||
p += sprintf(p, "%4u.%1u %4u.%1u %3u.%1u"
|
||||
" %3u %3u %-3u "
|
||||
@ -243,8 +243,8 @@ minstrel_ht_stats_csv_dump(struct minstrel_ht_sta *mi, int i, char *p)
|
||||
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);
|
||||
|
||||
p += sprintf(p, "%u.%u,%u.%u,%u.%u,%u,%u,"
|
||||
"%u,%llu,%llu,",
|
||||
|
||||
Loading…
Reference in New Issue
Block a user