mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-22 06:57:57 +00:00
3aa18f71f9
This updates mac80211 to version 5.15.58-1 which is based on kernel 5.15.58. The removed patches were applied upstream. Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
152 lines
5.1 KiB
Diff
152 lines
5.1 KiB
Diff
From: Felix Fietkau <nbd@nbd.name>
|
|
Date: Sat, 6 Feb 2021 16:33:14 +0100
|
|
Subject: [PATCH] mac80211: minstrel_ht: rework rate downgrade code and
|
|
max_prob rate selection
|
|
|
|
The current fallback code for fast rate switching on potentially failing rates
|
|
is triggering too often if there is some strong noise on the channel. This can
|
|
lead to wild fluctuations in the rate selection.
|
|
Additionally, switching down to max_prob_rate can create a significant gap down
|
|
in throughput, especially when using only 2 spatial streams, because max_prob_rate
|
|
is limited to using fewer streams than the max_tp rates.
|
|
In order to improve throughput without reducing reliability too much, use the
|
|
rate downgrade code for the max_prob_rate only, and allow the non-downgraded
|
|
max_prob_rate to use as many spatial streams as the max_tp rates
|
|
|
|
Signed-off-by: Felix Fietkau <nbd@nbd.name>
|
|
---
|
|
|
|
--- a/net/mac80211/rc80211_minstrel_ht.c
|
|
+++ b/net/mac80211/rc80211_minstrel_ht.c
|
|
@@ -514,6 +514,14 @@ minstrel_ht_set_best_prob_rate(struct mi
|
|
int cur_tp_avg, cur_group, cur_idx;
|
|
int max_gpr_group, max_gpr_idx;
|
|
int max_gpr_tp_avg, max_gpr_prob;
|
|
+ int min_dur;
|
|
+
|
|
+ min_dur = max(minstrel_get_duration(mi->max_tp_rate[0]),
|
|
+ minstrel_get_duration(mi->max_tp_rate[1]));
|
|
+
|
|
+ /* make the rate at least 18% slower than max tp rates */
|
|
+ if (minstrel_get_duration(index) <= min_dur * 19 / 16)
|
|
+ return;
|
|
|
|
cur_group = MI_RATE_GROUP(index);
|
|
cur_idx = MI_RATE_IDX(index);
|
|
@@ -535,11 +543,6 @@ minstrel_ht_set_best_prob_rate(struct mi
|
|
!minstrel_ht_is_legacy_group(max_tp_group))
|
|
return;
|
|
|
|
- /* skip rates faster than max tp rate with lower prob */
|
|
- if (minstrel_get_duration(mi->max_tp_rate[0]) > minstrel_get_duration(index) &&
|
|
- mrs->prob_avg < max_tp_prob)
|
|
- return;
|
|
-
|
|
max_gpr_group = MI_RATE_GROUP(mg->max_group_prob_rate);
|
|
max_gpr_idx = MI_RATE_IDX(mg->max_group_prob_rate);
|
|
max_gpr_prob = mi->groups[max_gpr_group].rates[max_gpr_idx].prob_avg;
|
|
@@ -597,40 +600,6 @@ minstrel_ht_assign_best_tp_rates(struct
|
|
|
|
}
|
|
|
|
-/*
|
|
- * Try to increase robustness of max_prob rate by decrease number of
|
|
- * streams if possible.
|
|
- */
|
|
-static inline void
|
|
-minstrel_ht_prob_rate_reduce_streams(struct minstrel_ht_sta *mi)
|
|
-{
|
|
- struct minstrel_mcs_group_data *mg;
|
|
- int tmp_max_streams, group, tmp_idx, tmp_prob;
|
|
- int tmp_tp = 0;
|
|
-
|
|
- if (!mi->sta->ht_cap.ht_supported)
|
|
- return;
|
|
-
|
|
- group = MI_RATE_GROUP(mi->max_tp_rate[0]);
|
|
- tmp_max_streams = minstrel_mcs_groups[group].streams;
|
|
- for (group = 0; group < ARRAY_SIZE(minstrel_mcs_groups); group++) {
|
|
- mg = &mi->groups[group];
|
|
- if (!mi->supported[group] || group == MINSTREL_CCK_GROUP)
|
|
- continue;
|
|
-
|
|
- tmp_idx = MI_RATE_IDX(mg->max_group_prob_rate);
|
|
- 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)) {
|
|
- mi->max_prob_rate = mg->max_group_prob_rate;
|
|
- tmp_tp = minstrel_ht_get_tp_avg(mi, group,
|
|
- tmp_idx,
|
|
- tmp_prob);
|
|
- }
|
|
- }
|
|
-}
|
|
-
|
|
static u16
|
|
__minstrel_ht_get_sample_rate(struct minstrel_ht_sta *mi,
|
|
enum minstrel_sample_type type)
|
|
@@ -1110,8 +1079,6 @@ minstrel_ht_update_stats(struct minstrel
|
|
|
|
mi->max_prob_rate = tmp_max_prob_rate;
|
|
|
|
- /* Try to increase robustness of max_prob_rate*/
|
|
- minstrel_ht_prob_rate_reduce_streams(mi);
|
|
minstrel_ht_refill_sample_rates(mi);
|
|
|
|
#ifdef CPTCFG_MAC80211_DEBUGFS
|
|
@@ -1156,7 +1123,7 @@ minstrel_ht_txstat_valid(struct minstrel
|
|
}
|
|
|
|
static void
|
|
-minstrel_downgrade_rate(struct minstrel_ht_sta *mi, u16 *idx, bool primary)
|
|
+minstrel_downgrade_prob_rate(struct minstrel_ht_sta *mi, u16 *idx)
|
|
{
|
|
int group, orig_group;
|
|
|
|
@@ -1171,11 +1138,7 @@ minstrel_downgrade_rate(struct minstrel_
|
|
minstrel_mcs_groups[orig_group].streams)
|
|
continue;
|
|
|
|
- if (primary)
|
|
- *idx = mi->groups[group].max_group_tp_rate[0];
|
|
- else
|
|
- *idx = mi->groups[group].max_group_tp_rate[1];
|
|
- break;
|
|
+ *idx = mi->groups[group].max_group_prob_rate;
|
|
}
|
|
}
|
|
|
|
@@ -1186,7 +1149,7 @@ minstrel_ht_tx_status(void *priv, struct
|
|
struct ieee80211_tx_info *info = st->info;
|
|
struct minstrel_ht_sta *mi = priv_sta;
|
|
struct ieee80211_tx_rate *ar = info->status.rates;
|
|
- struct minstrel_rate_stats *rate, *rate2;
|
|
+ struct minstrel_rate_stats *rate;
|
|
struct minstrel_priv *mp = priv;
|
|
u32 update_interval = mp->update_interval;
|
|
bool last, update = false;
|
|
@@ -1236,18 +1199,13 @@ minstrel_ht_tx_status(void *priv, struct
|
|
/*
|
|
* check for sudden death of spatial multiplexing,
|
|
* downgrade to a lower number of streams if necessary.
|
|
+ * only do this for the max_prob_rate to prevent spurious
|
|
+ * rate fluctuations when the link changes suddenly
|
|
*/
|
|
- rate = minstrel_get_ratestats(mi, mi->max_tp_rate[0]);
|
|
+ rate = minstrel_get_ratestats(mi, mi->max_prob_rate);
|
|
if (rate->attempts > 30 &&
|
|
rate->success < rate->attempts / 4) {
|
|
- minstrel_downgrade_rate(mi, &mi->max_tp_rate[0], true);
|
|
- update = true;
|
|
- }
|
|
-
|
|
- rate2 = minstrel_get_ratestats(mi, mi->max_tp_rate[1]);
|
|
- if (rate2->attempts > 30 &&
|
|
- rate2->success < rate2->attempts / 4) {
|
|
- minstrel_downgrade_rate(mi, &mi->max_tp_rate[1], false);
|
|
+ minstrel_downgrade_prob_rate(mi, &mi->max_prob_rate);
|
|
update = true;
|
|
}
|
|
}
|