From 41d085835d3d2258633d8959e717198e31d3862e Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Wed, 14 Dec 2016 20:46:54 +0100 Subject: [PATCH] mac80211: minstrel_ht: move supported bitrate mask out of group data Improves dcache footprint by ensuring that fewer cache lines need to be touched. Signed-off-by: Felix Fietkau Signed-off-by: Johannes Berg --- net/mac80211/rc80211_minstrel_ht.c | 30 +++++++++++----------- net/mac80211/rc80211_minstrel_ht.h | 6 ++--- net/mac80211/rc80211_minstrel_ht_debugfs.c | 8 +++--- 3 files changed, 22 insertions(+), 22 deletions(-) diff --git a/net/mac80211/rc80211_minstrel_ht.c b/net/mac80211/rc80211_minstrel_ht.c index 30fbabf4bcbc..ed8a34d46e73 100644 --- a/net/mac80211/rc80211_minstrel_ht.c +++ b/net/mac80211/rc80211_minstrel_ht.c @@ -301,7 +301,7 @@ minstrel_ht_get_stats(struct minstrel_priv *mp, struct minstrel_ht_sta *mi, break; /* short preamble */ - if (!(mi->groups[group].supported & BIT(idx))) + if (!(mi->supported[group] & BIT(idx))) idx += 4; } return &mi->groups[group].rates[idx]; @@ -486,7 +486,7 @@ minstrel_ht_prob_rate_reduce_streams(struct minstrel_ht_sta *mi) MCS_GROUP_RATES].streams; for (group = 0; group < ARRAY_SIZE(minstrel_mcs_groups); group++) { mg = &mi->groups[group]; - if (!mg->supported || group == MINSTREL_CCK_GROUP) + if (!mi->supported[group] || group == MINSTREL_CCK_GROUP) continue; tmp_idx = mg->max_group_prob_rate % MCS_GROUP_RATES; @@ -540,7 +540,7 @@ minstrel_ht_update_stats(struct minstrel_priv *mp, struct minstrel_ht_sta *mi) for (group = 0; group < ARRAY_SIZE(minstrel_mcs_groups); group++) { mg = &mi->groups[group]; - if (!mg->supported) + if (!mi->supported[group]) continue; mi->sample_count++; @@ -550,7 +550,7 @@ minstrel_ht_update_stats(struct minstrel_priv *mp, struct minstrel_ht_sta *mi) tmp_group_tp_rate[j] = group; for (i = 0; i < MCS_GROUP_RATES; i++) { - if (!(mg->supported & BIT(i))) + if (!(mi->supported[group] & BIT(i))) continue; index = MCS_GROUP_RATES * group + i; @@ -636,7 +636,7 @@ minstrel_set_next_sample_idx(struct minstrel_ht_sta *mi) mi->sample_group %= ARRAY_SIZE(minstrel_mcs_groups); mg = &mi->groups[mi->sample_group]; - if (!mg->supported) + if (!mi->supported[mi->sample_group]) continue; if (++mg->index >= MCS_GROUP_RATES) { @@ -657,7 +657,7 @@ minstrel_downgrade_rate(struct minstrel_ht_sta *mi, u16 *idx, bool primary) while (group > 0) { group--; - if (!mi->groups[group].supported) + if (!mi->supported[group]) continue; if (minstrel_mcs_groups[group].streams > @@ -994,7 +994,7 @@ minstrel_get_sample_rate(struct minstrel_priv *mp, struct minstrel_ht_sta *mi) sample_idx = sample_table[mg->column][mg->index]; minstrel_set_next_sample_idx(mi); - if (!(mg->supported & BIT(sample_idx))) + if (!(mi->supported[sample_group] & BIT(sample_idx))) return -1; mrs = &mg->rates[sample_idx]; @@ -1052,7 +1052,7 @@ static void minstrel_ht_check_cck_shortpreamble(struct minstrel_priv *mp, struct minstrel_ht_sta *mi, bool val) { - u8 supported = mi->groups[MINSTREL_CCK_GROUP].supported; + u8 supported = mi->supported[MINSTREL_CCK_GROUP]; if (!supported || !mi->cck_supported_short) return; @@ -1061,7 +1061,7 @@ minstrel_ht_check_cck_shortpreamble(struct minstrel_priv *mp, return; supported ^= mi->cck_supported_short | (mi->cck_supported_short << 4); - mi->groups[MINSTREL_CCK_GROUP].supported = supported; + mi->supported[MINSTREL_CCK_GROUP] = supported; } static void @@ -1154,7 +1154,7 @@ minstrel_ht_update_cck(struct minstrel_priv *mp, struct minstrel_ht_sta *mi, mi->cck_supported_short |= BIT(i); } - mi->groups[MINSTREL_CCK_GROUP].supported = mi->cck_supported; + mi->supported[MINSTREL_CCK_GROUP] = mi->cck_supported; } static void @@ -1224,7 +1224,7 @@ minstrel_ht_update_caps(void *priv, struct ieee80211_supported_band *sband, u32 gflags = minstrel_mcs_groups[i].flags; int bw, nss; - mi->groups[i].supported = 0; + mi->supported[i] = 0; if (i == MINSTREL_CCK_GROUP) { minstrel_ht_update_cck(mp, mi, sband, sta); continue; @@ -1256,8 +1256,8 @@ minstrel_ht_update_caps(void *priv, struct ieee80211_supported_band *sband, if (use_vht && minstrel_vht_only) continue; #endif - mi->groups[i].supported = mcs->rx_mask[nss - 1]; - if (mi->groups[i].supported) + mi->supported[i] = mcs->rx_mask[nss - 1]; + if (mi->supported[i]) n_supported++; continue; } @@ -1283,10 +1283,10 @@ minstrel_ht_update_caps(void *priv, struct ieee80211_supported_band *sband, else bw = BW_20; - mi->groups[i].supported = minstrel_get_valid_vht_rates(bw, nss, + mi->supported[i] = minstrel_get_valid_vht_rates(bw, nss, vht_cap->vht_mcs.tx_mcs_map); - if (mi->groups[i].supported) + if (mi->supported[i]) n_supported++; } diff --git a/net/mac80211/rc80211_minstrel_ht.h b/net/mac80211/rc80211_minstrel_ht.h index e8b52a94d24b..de1646c42e82 100644 --- a/net/mac80211/rc80211_minstrel_ht.h +++ b/net/mac80211/rc80211_minstrel_ht.h @@ -52,9 +52,6 @@ struct minstrel_mcs_group_data { u8 index; u8 column; - /* bitfield of supported MCS rates of this group */ - u16 supported; - /* sorted rate set within a MCS group*/ u16 max_group_tp_rate[MAX_THR_RATES]; u16 max_group_prob_rate; @@ -101,6 +98,9 @@ struct minstrel_ht_sta { u8 cck_supported; u8 cck_supported_short; + /* Bitfield of supported MCS rates of all groups */ + u16 supported[MINSTREL_GROUPS_NB]; + /* MCS rate group info and statistics */ struct minstrel_mcs_group_data groups[MINSTREL_GROUPS_NB]; }; diff --git a/net/mac80211/rc80211_minstrel_ht_debugfs.c b/net/mac80211/rc80211_minstrel_ht_debugfs.c index 5320e35ed3d0..1942d4b3cd18 100644 --- a/net/mac80211/rc80211_minstrel_ht_debugfs.c +++ b/net/mac80211/rc80211_minstrel_ht_debugfs.c @@ -24,7 +24,7 @@ minstrel_ht_stats_dump(struct minstrel_ht_sta *mi, int i, char *p) char gimode = 'L'; u32 gflags; - if (!mi->groups[i].supported) + if (!mi->supported[i]) return p; mg = &minstrel_mcs_groups[i]; @@ -42,7 +42,7 @@ minstrel_ht_stats_dump(struct minstrel_ht_sta *mi, int i, char *p) static const int bitrates[4] = { 10, 20, 55, 110 }; int idx = i * MCS_GROUP_RATES + j; - if (!(mi->groups[i].supported & BIT(j))) + if (!(mi->supported[i] & BIT(j))) continue; if (gflags & IEEE80211_TX_RC_MCS) { @@ -170,7 +170,7 @@ minstrel_ht_stats_csv_dump(struct minstrel_ht_sta *mi, int i, char *p) char gimode = 'L'; u32 gflags; - if (!mi->groups[i].supported) + if (!mi->supported[i]) return p; mg = &minstrel_mcs_groups[i]; @@ -188,7 +188,7 @@ minstrel_ht_stats_csv_dump(struct minstrel_ht_sta *mi, int i, char *p) static const int bitrates[4] = { 10, 20, 55, 110 }; int idx = i * MCS_GROUP_RATES + j; - if (!(mi->groups[i].supported & BIT(j))) + if (!(mi->supported[i] & BIT(j))) continue; if (gflags & IEEE80211_TX_RC_MCS) { -- 2.20.1