From bc96f24266291c1b967cfa868904731b1bb9a08c Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Sat, 16 Mar 2013 17:00:26 +0100 Subject: [PATCH] mac80211/minstrel_ht: avoid useless sampling of high-probability slower rates Slow rates that have >95% success probability do not need to be monitored continuously. When the channel conditions change rapidly, the slow sampling results are useless anyway. When conditions change slowly, they will be monitored by gradual downgrading of the actively used rates. This patch slightly improves throughput under good conditions. Signed-off-by: Felix Fietkau Signed-off-by: Johannes Berg --- net/mac80211/rc80211_minstrel_ht.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/net/mac80211/rc80211_minstrel_ht.c b/net/mac80211/rc80211_minstrel_ht.c index 90499c421702..0fc9449925ef 100644 --- a/net/mac80211/rc80211_minstrel_ht.c +++ b/net/mac80211/rc80211_minstrel_ht.c @@ -653,10 +653,10 @@ minstrel_get_sample_rate(struct minstrel_priv *mp, struct minstrel_ht_sta *mi) if (sample_idx == mi->max_tp_rate) return -1; /* - * When not using MRR, do not sample if the probability is already - * higher than 95% to avoid wasting airtime + * Do not sample if the probability is already higher than 95% + * to avoid wasting airtime. */ - if (!mp->has_mrr && (mr->probability > MINSTREL_FRAC(95, 100))) + if (mr->probability > MINSTREL_FRAC(95, 100)) return -1; /*