diff options
| author | Felix Fietkau <nbd@nbd.name> | 2019-10-08 19:11:37 +0200 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2019-10-11 10:31:15 +0200 |
| commit | 8f2f495ca93e01b383dc0944689e7595027ca6ec (patch) | |
| tree | 15a2fa7542b78ec447508c40a9c79633199ac8d9 /net/mac80211/rc80211_minstrel_ht.c | |
| parent | nl80211: trivial: Remove redundant loop (diff) | |
| download | linux-8f2f495ca93e01b383dc0944689e7595027ca6ec.tar.xz linux-8f2f495ca93e01b383dc0944689e7595027ca6ec.zip | |
mac80211: minstrel: remove divisions in tx status path
Use a slightly different threshold for downgrading spatial streams to
make it easier to calculate without divisions.
Slightly reduces CPU overhead.
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Link: https://lore.kernel.org/r/20191008171139.96476-1-nbd@nbd.name
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211/rc80211_minstrel_ht.c')
| -rw-r--r-- | net/mac80211/rc80211_minstrel_ht.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/net/mac80211/rc80211_minstrel_ht.c b/net/mac80211/rc80211_minstrel_ht.c index 0ef2633349b5..21c74b200269 100644 --- a/net/mac80211/rc80211_minstrel_ht.c +++ b/net/mac80211/rc80211_minstrel_ht.c @@ -970,23 +970,21 @@ minstrel_ht_tx_status(void *priv, struct ieee80211_supported_band *sband, */ rate = minstrel_get_ratestats(mi, mi->max_tp_rate[0]); if (rate->attempts > 30 && - MINSTREL_FRAC(rate->success, rate->attempts) < - MINSTREL_FRAC(20, 100)) { + 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 && - MINSTREL_FRAC(rate2->success, rate2->attempts) < - MINSTREL_FRAC(20, 100)) { + rate2->success < rate2->attempts / 4) { minstrel_downgrade_rate(mi, &mi->max_tp_rate[1], false); update = true; } } if (time_after(jiffies, mi->last_stats_update + - (mp->update_interval / 2 * HZ) / 1000)) { + mp->update_interval / 2)) { update = true; minstrel_ht_update_stats(mp, mi, true); } @@ -1666,7 +1664,7 @@ minstrel_ht_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir) mp->has_mrr = true; mp->hw = hw; - mp->update_interval = 100; + mp->update_interval = HZ / 10; #ifdef CONFIG_MAC80211_DEBUGFS mp->fixed_rate_idx = (u32) -1; |