diff options
Diffstat (limited to 'net/mac80211/rc80211_minstrel.c')
| -rw-r--r-- | net/mac80211/rc80211_minstrel.c | 48 |
1 files changed, 26 insertions, 22 deletions
diff --git a/net/mac80211/rc80211_minstrel.c b/net/mac80211/rc80211_minstrel.c index ee86c3333999..86bc469a28bc 100644 --- a/net/mac80211/rc80211_minstrel.c +++ b/net/mac80211/rc80211_minstrel.c @@ -70,7 +70,7 @@ rix_to_ndx(struct minstrel_sta_info *mi, int rix) } /* 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_rate *mr, int prob_ewma) 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 minstrel_sta_info *mi, int i, u8 *tp_list) 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; } @@ -157,20 +157,24 @@ minstrel_update_rates(struct minstrel_priv *mp, struct minstrel_sta_info *mi) * Recalculate statistics and counters of a given rate */ void -minstrel_calc_rate_stats(struct minstrel_rate_stats *mrs) +minstrel_calc_rate_stats(struct minstrel_priv *mp, + struct minstrel_rate_stats *mrs) { unsigned int cur_prob; if (unlikely(mrs->attempts > 0)) { mrs->sample_skipped = 0; cur_prob = MINSTREL_FRAC(mrs->success, mrs->attempts); - if (unlikely(!mrs->att_hist)) { - mrs->prob_ewma = cur_prob; + if (mp->new_avg) { + minstrel_filter_avg_add(&mrs->prob_avg, + &mrs->prob_avg_1, cur_prob); + } else if (unlikely(!mrs->att_hist)) { + mrs->prob_avg = cur_prob; } else { /*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; @@ -200,12 +204,12 @@ minstrel_update_stats(struct minstrel_priv *mp, struct minstrel_sta_info *mi) struct minstrel_rate_stats *tmp_mrs = &mi->r[tmp_prob_rate].stats; /* Update statistics of success probability per rate */ - minstrel_calc_rate_stats(mrs); + minstrel_calc_rate_stats(mp, mrs); /* 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; @@ -225,14 +229,14 @@ minstrel_update_stats(struct minstrel_priv *mp, struct minstrel_sta_info *mi) * 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; } } @@ -290,7 +294,7 @@ minstrel_tx_status(void *priv, struct ieee80211_supported_band *sband, mi->sample_deferred--; if (time_after(jiffies, mi->last_stats_update + - (mp->update_interval * HZ) / 1000)) + mp->update_interval / (mp->new_avg ? 2 : 1))) minstrel_update_stats(mp, mi); } @@ -422,7 +426,7 @@ minstrel_get_rate(void *priv, struct ieee80211_sta *sta, * 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; @@ -573,7 +577,7 @@ static u32 minstrel_get_expected_throughput(void *priv_sta) * 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; |