All of lore.kernel.org
 help / color / mirror / Atom feed
From: Felix Fietkau <nbd@nbd.name>
To: linux-wireless@vger.kernel.org
Cc: johannes@sipsolutions.net
Subject: [PATCH v2 4/8] mac80211: minstrel_ht: remove old ewma based rate average code
Date: Sun,  3 Jan 2021 12:51:36 +0100	[thread overview]
Message-ID: <20210103115140.18614-4-nbd@nbd.name> (raw)
In-Reply-To: <20210103115140.18614-1-nbd@nbd.name>

The new noise filter has been the default for a while now with no reported
downside and significant improvement compared to the old code.

Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
 net/mac80211/rc80211_minstrel_ht.c | 31 ++++++++----------------------
 net/mac80211/rc80211_minstrel_ht.h |  1 -
 2 files changed, 8 insertions(+), 24 deletions(-)

diff --git a/net/mac80211/rc80211_minstrel_ht.c b/net/mac80211/rc80211_minstrel_ht.c
index 1fc3e836fe95..9280461ed3cc 100644
--- a/net/mac80211/rc80211_minstrel_ht.c
+++ b/net/mac80211/rc80211_minstrel_ht.c
@@ -769,17 +769,8 @@ minstrel_ht_calc_rate_stats(struct minstrel_priv *mp,
 	if (unlikely(mrs->attempts > 0)) {
 		mrs->sample_skipped = 0;
 		cur_prob = MINSTREL_FRAC(mrs->success, mrs->attempts);
-		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_avg = minstrel_ewma(mrs->prob_avg,
-						      cur_prob,
-						      EWMA_LEVEL);
-		}
+		minstrel_filter_avg_add(&mrs->prob_avg,
+					&mrs->prob_avg_1, cur_prob);
 		mrs->att_hist += mrs->attempts;
 		mrs->succ_hist += mrs->success;
 	} else {
@@ -913,10 +904,8 @@ minstrel_ht_update_stats(struct minstrel_priv *mp, struct minstrel_ht_sta *mi,
 	/* Try to increase robustness of max_prob_rate*/
 	minstrel_ht_prob_rate_reduce_streams(mi);
 
-	/* try to sample all available rates during each interval */
-	mi->sample_count *= 8;
-	if (mp->new_avg)
-		mi->sample_count /= 2;
+	/* try to sample half of all available rates during each interval */
+	mi->sample_count *= 4;
 
 	if (sample)
 		minstrel_ht_rate_sample_switch(mp, mi);
@@ -1040,7 +1029,7 @@ minstrel_ht_tx_status(void *priv, struct ieee80211_supported_band *sband,
 	struct ieee80211_tx_rate *ar = info->status.rates;
 	struct minstrel_rate_stats *rate, *rate2, *rate_sample = NULL;
 	struct minstrel_priv *mp = priv;
-	u32 update_interval = mp->update_interval / 2;
+	u32 update_interval = mp->update_interval;
 	bool last, update = false;
 	bool sample_status = false;
 	int i;
@@ -1090,9 +1079,8 @@ minstrel_ht_tx_status(void *priv, struct ieee80211_supported_band *sband,
 
 	switch (mi->sample_mode) {
 	case MINSTREL_SAMPLE_IDLE:
-		if (mp->new_avg &&
-		    (mp->hw->max_rates > 1 ||
-		     mi->total_packets_cur < SAMPLE_SWITCH_THR))
+		if (mp->hw->max_rates > 1 ||
+		     mi->total_packets_cur < SAMPLE_SWITCH_THR)
 			update_interval /= 2;
 		break;
 
@@ -1832,8 +1820,7 @@ minstrel_ht_alloc(struct ieee80211_hw *hw)
 		mp->has_mrr = true;
 
 	mp->hw = hw;
-	mp->update_interval = HZ / 10;
-	mp->new_avg = true;
+	mp->update_interval = HZ / 20;
 
 	minstrel_ht_init_cck_rates(mp);
 	for (i = 0; i < ARRAY_SIZE(mp->hw->wiphy->bands); i++)
@@ -1853,8 +1840,6 @@ static void minstrel_ht_add_debugfs(struct ieee80211_hw *hw, void *priv,
 			   &mp->fixed_rate_idx);
 	debugfs_create_u32("sample_switch", S_IRUGO | S_IWUSR, debugfsdir,
 			   &mp->sample_switch);
-	debugfs_create_bool("new_avg", S_IRUGO | S_IWUSR, debugfsdir,
-			   &mp->new_avg);
 }
 #endif
 
diff --git a/net/mac80211/rc80211_minstrel_ht.h b/net/mac80211/rc80211_minstrel_ht.h
index 25c3664bddde..7d6d0b720f6d 100644
--- a/net/mac80211/rc80211_minstrel_ht.h
+++ b/net/mac80211/rc80211_minstrel_ht.h
@@ -60,7 +60,6 @@
 struct minstrel_priv {
 	struct ieee80211_hw *hw;
 	bool has_mrr;
-	bool new_avg;
 	u32 sample_switch;
 	unsigned int cw_min;
 	unsigned int cw_max;
-- 
2.28.0


  parent reply	other threads:[~2021-01-03 11:52 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-03 11:51 [PATCH v2 1/8] mac80211: minstrel_ht: clean up CCK code Felix Fietkau
2021-01-03 11:51 ` [PATCH v2 2/8] mac80211: minstrel_ht: add support for OFDM rates on non-HT clients Felix Fietkau
2021-01-03 11:51 ` [PATCH v2 3/8] mac80211: remove legacy minstrel rate control Felix Fietkau
2021-01-03 11:51 ` Felix Fietkau [this message]
2021-01-03 11:51 ` [PATCH v2 5/8] mac80211: minstrel_ht: improve ampdu length estimation Felix Fietkau
2021-01-03 11:51 ` [PATCH v2 6/8] mac80211: minstrel_ht: improve sample rate selection Felix Fietkau
2021-01-03 11:51 ` [PATCH v2 7/8] mac80211: minstrel_ht: fix max probability " Felix Fietkau
2021-01-13  8:20   ` [mac80211] 46ec32f234: WARNING:at_net/mac80211/rate.c:#ieee80211_get_tx_rates[mac80211] kernel test robot
2021-01-13  8:20     ` kernel test robot
2021-01-03 11:51 ` [PATCH v2 8/8] mac80211: minstrel_ht: increase stats update interval Felix Fietkau

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210103115140.18614-4-nbd@nbd.name \
    --to=nbd@nbd.name \
    --cc=johannes@sipsolutions.net \
    --cc=linux-wireless@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.