diff options
Diffstat (limited to 'package/kernel/mac80211/patches/subsys/306-mac80211-minstrel-reduce-minstrel_mcs_groups-size.patch')
| -rw-r--r-- | package/kernel/mac80211/patches/subsys/306-mac80211-minstrel-reduce-minstrel_mcs_groups-size.patch | 368 |
1 files changed, 0 insertions, 368 deletions
diff --git a/package/kernel/mac80211/patches/subsys/306-mac80211-minstrel-reduce-minstrel_mcs_groups-size.patch b/package/kernel/mac80211/patches/subsys/306-mac80211-minstrel-reduce-minstrel_mcs_groups-size.patch deleted file mode 100644 index 02a0ca0a52..0000000000 --- a/package/kernel/mac80211/patches/subsys/306-mac80211-minstrel-reduce-minstrel_mcs_groups-size.patch +++ /dev/null @@ -1,368 +0,0 @@ -From: Felix Fietkau <nbd@nbd.name> -Date: Sat, 10 Feb 2018 12:45:47 +0100 -Subject: [PATCH] mac80211: minstrel: reduce minstrel_mcs_groups size - -By storing a shift value for all duration values of a group, we can -reduce precision by a neglegible amount to make it fit into a u16 value. -This improves cache footprint and reduces size: - -Before: - text data bss dec hex filename - 10024 116 0 10140 279c rc80211_minstrel_ht.o - -After: - text data bss dec hex filename - 9368 116 0 9484 250c rc80211_minstrel_ht.o - -Signed-off-by: Felix Fietkau <nbd@nbd.name> ---- - ---- a/net/mac80211/rc80211_minstrel_ht.c -+++ b/net/mac80211/rc80211_minstrel_ht.c -@@ -52,22 +52,23 @@ - _streams - 1 - - /* MCS rate information for an MCS group */ --#define MCS_GROUP(_streams, _sgi, _ht40) \ -+#define MCS_GROUP(_streams, _sgi, _ht40, _s) \ - [GROUP_IDX(_streams, _sgi, _ht40)] = { \ - .streams = _streams, \ -+ .shift = _s, \ - .flags = \ - IEEE80211_TX_RC_MCS | \ - (_sgi ? IEEE80211_TX_RC_SHORT_GI : 0) | \ - (_ht40 ? IEEE80211_TX_RC_40_MHZ_WIDTH : 0), \ - .duration = { \ -- MCS_DURATION(_streams, _sgi, _ht40 ? 54 : 26), \ -- MCS_DURATION(_streams, _sgi, _ht40 ? 108 : 52), \ -- MCS_DURATION(_streams, _sgi, _ht40 ? 162 : 78), \ -- MCS_DURATION(_streams, _sgi, _ht40 ? 216 : 104), \ -- MCS_DURATION(_streams, _sgi, _ht40 ? 324 : 156), \ -- MCS_DURATION(_streams, _sgi, _ht40 ? 432 : 208), \ -- MCS_DURATION(_streams, _sgi, _ht40 ? 486 : 234), \ -- MCS_DURATION(_streams, _sgi, _ht40 ? 540 : 260) \ -+ MCS_DURATION(_streams, _sgi, _ht40 ? 54 : 26) >> _s, \ -+ MCS_DURATION(_streams, _sgi, _ht40 ? 108 : 52) >> _s, \ -+ MCS_DURATION(_streams, _sgi, _ht40 ? 162 : 78) >> _s, \ -+ MCS_DURATION(_streams, _sgi, _ht40 ? 216 : 104) >> _s, \ -+ MCS_DURATION(_streams, _sgi, _ht40 ? 324 : 156) >> _s, \ -+ MCS_DURATION(_streams, _sgi, _ht40 ? 432 : 208) >> _s, \ -+ MCS_DURATION(_streams, _sgi, _ht40 ? 486 : 234) >> _s, \ -+ MCS_DURATION(_streams, _sgi, _ht40 ? 540 : 260) >> _s \ - } \ - } - -@@ -80,9 +81,10 @@ - #define BW2VBPS(_bw, r3, r2, r1) \ - (_bw == BW_80 ? r3 : _bw == BW_40 ? r2 : r1) - --#define VHT_GROUP(_streams, _sgi, _bw) \ -+#define VHT_GROUP(_streams, _sgi, _bw, _s) \ - [VHT_GROUP_IDX(_streams, _sgi, _bw)] = { \ - .streams = _streams, \ -+ .shift = _s, \ - .flags = \ - IEEE80211_TX_RC_VHT_MCS | \ - (_sgi ? IEEE80211_TX_RC_SHORT_GI : 0) | \ -@@ -90,25 +92,25 @@ - _bw == BW_40 ? IEEE80211_TX_RC_40_MHZ_WIDTH : 0), \ - .duration = { \ - MCS_DURATION(_streams, _sgi, \ -- BW2VBPS(_bw, 117, 54, 26)), \ -+ BW2VBPS(_bw, 117, 54, 26)) >> _s, \ - MCS_DURATION(_streams, _sgi, \ -- BW2VBPS(_bw, 234, 108, 52)), \ -+ BW2VBPS(_bw, 234, 108, 52)) >> _s, \ - MCS_DURATION(_streams, _sgi, \ -- BW2VBPS(_bw, 351, 162, 78)), \ -+ BW2VBPS(_bw, 351, 162, 78)) >> _s, \ - MCS_DURATION(_streams, _sgi, \ -- BW2VBPS(_bw, 468, 216, 104)), \ -+ BW2VBPS(_bw, 468, 216, 104)) >> _s, \ - MCS_DURATION(_streams, _sgi, \ -- BW2VBPS(_bw, 702, 324, 156)), \ -+ BW2VBPS(_bw, 702, 324, 156)) >> _s, \ - MCS_DURATION(_streams, _sgi, \ -- BW2VBPS(_bw, 936, 432, 208)), \ -+ BW2VBPS(_bw, 936, 432, 208)) >> _s, \ - MCS_DURATION(_streams, _sgi, \ -- BW2VBPS(_bw, 1053, 486, 234)), \ -+ BW2VBPS(_bw, 1053, 486, 234)) >> _s, \ - MCS_DURATION(_streams, _sgi, \ -- BW2VBPS(_bw, 1170, 540, 260)), \ -+ BW2VBPS(_bw, 1170, 540, 260)) >> _s, \ - MCS_DURATION(_streams, _sgi, \ -- BW2VBPS(_bw, 1404, 648, 312)), \ -+ BW2VBPS(_bw, 1404, 648, 312)) >> _s, \ - MCS_DURATION(_streams, _sgi, \ -- BW2VBPS(_bw, 1560, 720, 346)) \ -+ BW2VBPS(_bw, 1560, 720, 346)) >> _s \ - } \ - } - -@@ -121,19 +123,20 @@ - (CCK_DURATION((_bitrate > 10 ? 20 : 10), false, 60) + \ - CCK_DURATION(_bitrate, _short, AVG_PKT_SIZE)) - --#define CCK_DURATION_LIST(_short) \ -- CCK_ACK_DURATION(10, _short), \ -- CCK_ACK_DURATION(20, _short), \ -- CCK_ACK_DURATION(55, _short), \ -- CCK_ACK_DURATION(110, _short) -+#define CCK_DURATION_LIST(_short, _s) \ -+ CCK_ACK_DURATION(10, _short) >> _s, \ -+ CCK_ACK_DURATION(20, _short) >> _s, \ -+ CCK_ACK_DURATION(55, _short) >> _s, \ -+ CCK_ACK_DURATION(110, _short) >> _s - --#define CCK_GROUP \ -+#define CCK_GROUP(_s) \ - [MINSTREL_CCK_GROUP] = { \ - .streams = 0, \ - .flags = 0, \ -+ .shift = _s, \ - .duration = { \ -- CCK_DURATION_LIST(false), \ -- CCK_DURATION_LIST(true) \ -+ CCK_DURATION_LIST(false, _s), \ -+ CCK_DURATION_LIST(true, _s) \ - } \ - } - -@@ -151,47 +154,47 @@ MODULE_PARM_DESC(minstrel_vht_only, - * BW -> SGI -> #streams - */ - const struct mcs_group minstrel_mcs_groups[] = { -- MCS_GROUP(1, 0, BW_20), -- MCS_GROUP(2, 0, BW_20), -- MCS_GROUP(3, 0, BW_20), -- -- MCS_GROUP(1, 1, BW_20), -- MCS_GROUP(2, 1, BW_20), -- MCS_GROUP(3, 1, BW_20), -- -- MCS_GROUP(1, 0, BW_40), -- MCS_GROUP(2, 0, BW_40), -- MCS_GROUP(3, 0, BW_40), -- -- MCS_GROUP(1, 1, BW_40), -- MCS_GROUP(2, 1, BW_40), -- MCS_GROUP(3, 1, BW_40), -- -- CCK_GROUP, -- -- VHT_GROUP(1, 0, BW_20), -- VHT_GROUP(2, 0, BW_20), -- VHT_GROUP(3, 0, BW_20), -- -- VHT_GROUP(1, 1, BW_20), -- VHT_GROUP(2, 1, BW_20), -- VHT_GROUP(3, 1, BW_20), -- -- VHT_GROUP(1, 0, BW_40), -- VHT_GROUP(2, 0, BW_40), -- VHT_GROUP(3, 0, BW_40), -- -- VHT_GROUP(1, 1, BW_40), -- VHT_GROUP(2, 1, BW_40), -- VHT_GROUP(3, 1, BW_40), -- -- VHT_GROUP(1, 0, BW_80), -- VHT_GROUP(2, 0, BW_80), -- VHT_GROUP(3, 0, BW_80), -- -- VHT_GROUP(1, 1, BW_80), -- VHT_GROUP(2, 1, BW_80), -- VHT_GROUP(3, 1, BW_80), -+ MCS_GROUP(1, 0, BW_20, 5), -+ MCS_GROUP(2, 0, BW_20, 4), -+ MCS_GROUP(3, 0, BW_20, 4), -+ -+ MCS_GROUP(1, 1, BW_20, 5), -+ MCS_GROUP(2, 1, BW_20, 4), -+ MCS_GROUP(3, 1, BW_20, 4), -+ -+ MCS_GROUP(1, 0, BW_40, 4), -+ MCS_GROUP(2, 0, BW_40, 4), -+ MCS_GROUP(3, 0, BW_40, 4), -+ -+ MCS_GROUP(1, 1, BW_40, 4), -+ MCS_GROUP(2, 1, BW_40, 4), -+ MCS_GROUP(3, 1, BW_40, 4), -+ -+ CCK_GROUP(8), -+ -+ VHT_GROUP(1, 0, BW_20, 5), -+ VHT_GROUP(2, 0, BW_20, 4), -+ VHT_GROUP(3, 0, BW_20, 4), -+ -+ VHT_GROUP(1, 1, BW_20, 5), -+ VHT_GROUP(2, 1, BW_20, 4), -+ VHT_GROUP(3, 1, BW_20, 4), -+ -+ VHT_GROUP(1, 0, BW_40, 4), -+ VHT_GROUP(2, 0, BW_40, 4), -+ VHT_GROUP(3, 0, BW_40, 4), -+ -+ VHT_GROUP(1, 1, BW_40, 4), -+ VHT_GROUP(2, 1, BW_40, 4), -+ VHT_GROUP(3, 1, BW_40, 4), -+ -+ VHT_GROUP(1, 0, BW_80, 4), -+ VHT_GROUP(2, 0, BW_80, 4), -+ VHT_GROUP(3, 0, BW_80, 4), -+ -+ VHT_GROUP(1, 1, BW_80, 4), -+ VHT_GROUP(2, 1, BW_80, 4), -+ VHT_GROUP(3, 1, BW_80, 4), - }; - - static u8 sample_table[SAMPLE_COLUMNS][MCS_GROUP_RATES] __read_mostly; -@@ -307,7 +310,8 @@ minstrel_ht_get_tp_avg(struct minstrel_h - if (group != MINSTREL_CCK_GROUP) - nsecs = 1000 * mi->overhead / MINSTREL_TRUNC(mi->avg_ampdu_len); - -- nsecs += minstrel_mcs_groups[group].duration[rate]; -+ nsecs += minstrel_mcs_groups[group].duration[rate] << -+ minstrel_mcs_groups[group].shift; - - /* - * For the throughput calculation, limit the probability value to 90% to -@@ -755,12 +759,19 @@ minstrel_ht_tx_status(void *priv, struct - minstrel_ht_update_rates(mp, mi); - } - -+static inline int -+minstrel_get_duration(int index) -+{ -+ const struct mcs_group *group = &minstrel_mcs_groups[index / MCS_GROUP_RATES]; -+ unsigned int duration = group->duration[index % MCS_GROUP_RATES]; -+ return duration << group->shift; -+} -+ - static void - minstrel_calc_retransmit(struct minstrel_priv *mp, struct minstrel_ht_sta *mi, - int index) - { - struct minstrel_rate_stats *mrs; -- const struct mcs_group *group; - unsigned int tx_time, tx_time_rtscts, tx_time_data; - unsigned int cw = mp->cw_min; - unsigned int ctime = 0; -@@ -779,8 +790,7 @@ minstrel_calc_retransmit(struct minstrel - mrs->retry_count_rtscts = 2; - mrs->retry_updated = true; - -- group = &minstrel_mcs_groups[index / MCS_GROUP_RATES]; -- tx_time_data = group->duration[index % MCS_GROUP_RATES] * ampdu_len / 1000; -+ tx_time_data = minstrel_get_duration(index) * ampdu_len / 1000; - - /* Contention time for first 2 tries */ - ctime = (t_slot * cw) >> 1; -@@ -874,20 +884,24 @@ minstrel_ht_get_max_amsdu_len(struct min - int group = mi->max_prob_rate / MCS_GROUP_RATES; - const struct mcs_group *g = &minstrel_mcs_groups[group]; - int rate = mi->max_prob_rate % MCS_GROUP_RATES; -+ unsigned int duration; - - /* Disable A-MSDU if max_prob_rate is bad */ - if (mi->groups[group].rates[rate].prob_ewma < MINSTREL_FRAC(50, 100)) - return 1; - -+ duration = g->duration[rate]; -+ duration <<= g->shift; -+ - /* If the rate is slower than single-stream MCS1, make A-MSDU limit small */ -- if (g->duration[rate] > MCS_DURATION(1, 0, 52)) -+ if (duration > MCS_DURATION(1, 0, 52)) - return 500; - - /* - * If the rate is slower than single-stream MCS4, limit A-MSDU to usual - * data packet size - */ -- if (g->duration[rate] > MCS_DURATION(1, 0, 104)) -+ if (duration > MCS_DURATION(1, 0, 104)) - return 1600; - - /* -@@ -895,7 +909,7 @@ minstrel_ht_get_max_amsdu_len(struct min - * rate success probability is less than 75%, limit A-MSDU to twice the usual - * data packet size - */ -- if (g->duration[rate] > MCS_DURATION(1, 0, 260) || -+ if (duration > MCS_DURATION(1, 0, 260) || - (minstrel_ht_get_prob_ewma(mi, mi->max_tp_rate[0]) < - MINSTREL_FRAC(75, 100))) - return 3200; -@@ -942,13 +956,6 @@ minstrel_ht_update_rates(struct minstrel - rate_control_set_rates(mp->hw, mi->sta, rates); - } - --static inline int --minstrel_get_duration(int index) --{ -- const struct mcs_group *group = &minstrel_mcs_groups[index / MCS_GROUP_RATES]; -- return group->duration[index % MCS_GROUP_RATES]; --} -- - static int - minstrel_get_sample_rate(struct minstrel_priv *mp, struct minstrel_ht_sta *mi) - { ---- a/net/mac80211/rc80211_minstrel_ht.h -+++ b/net/mac80211/rc80211_minstrel_ht.h -@@ -33,9 +33,10 @@ - #define MCS_GROUP_RATES 10 - - struct mcs_group { -- u32 flags; -- unsigned int streams; -- unsigned int duration[MCS_GROUP_RATES]; -+ u16 flags; -+ u8 streams; -+ u8 shift; -+ u16 duration[MCS_GROUP_RATES]; - }; - - extern const struct mcs_group minstrel_mcs_groups[]; ---- a/net/mac80211/rc80211_minstrel_ht_debugfs.c -+++ b/net/mac80211/rc80211_minstrel_ht_debugfs.c -@@ -58,6 +58,7 @@ minstrel_ht_stats_dump(struct minstrel_h - static const int bitrates[4] = { 10, 20, 55, 110 }; - int idx = i * MCS_GROUP_RATES + j; - unsigned int prob_ewmsd; -+ unsigned int duration; - - if (!(mi->supported[i] & BIT(j))) - continue; -@@ -95,7 +96,9 @@ minstrel_ht_stats_dump(struct minstrel_h - p += sprintf(p, " %3u ", idx); - - /* tx_time[rate(i)] in usec */ -- tx_time = DIV_ROUND_CLOSEST(mg->duration[j], 1000); -+ duration = mg->duration[j]; -+ duration <<= mg->shift; -+ tx_time = DIV_ROUND_CLOSEST(duration, 1000); - p += sprintf(p, "%6u ", tx_time); - - tp_max = minstrel_ht_get_tp_avg(mi, i, j, MINSTREL_FRAC(100, 100)); -@@ -204,6 +207,7 @@ minstrel_ht_stats_csv_dump(struct minstr - static const int bitrates[4] = { 10, 20, 55, 110 }; - int idx = i * MCS_GROUP_RATES + j; - unsigned int prob_ewmsd; -+ unsigned int duration; - - if (!(mi->supported[i] & BIT(j))) - continue; -@@ -238,7 +242,10 @@ minstrel_ht_stats_csv_dump(struct minstr - } - - p += sprintf(p, "%u,", idx); -- tx_time = DIV_ROUND_CLOSEST(mg->duration[j], 1000); -+ -+ duration = mg->duration[j]; -+ duration <<= mg->shift; -+ tx_time = DIV_ROUND_CLOSEST(duration, 1000); - p += sprintf(p, "%u,", tx_time); - - tp_max = minstrel_ht_get_tp_avg(mi, i, j, MINSTREL_FRAC(100, 100)); |