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authorToke Høiland-Jørgensen <toke@toke.dk>2017-04-06 11:38:26 +0200
committerJohannes Berg <johannes.berg@intel.com>2017-05-17 16:03:40 +0200
commit484a54c2e597dbc4ace79c1687022282905afba0 (patch)
treecd1b98eb5968a6ad91165201d09b947232bf43f0 /net/mac80211/rate.c
parentcfg80211: improve warnings in VHT rate calculation (diff)
downloadlinux-484a54c2e597dbc4ace79c1687022282905afba0.tar.xz
linux-484a54c2e597dbc4ace79c1687022282905afba0.zip
mac80211: Dynamically set CoDel parameters per station
CoDel can be too aggressive if a station sends at a very low rate, leading reduced throughput. This gets worse the more stations are present, as each station gets more bursty the longer the round-robin scheduling between stations takes. This adds dynamic adjustment of CoDel parameters per station. It uses the rate selection information to estimate throughput and sets more lenient CoDel parameters if the estimated throughput is below a threshold (modified by the number of active stations). A new callback is added that drivers can use to notify mac80211 about changes in expected throughput, so the same adjustment can be made for cards that implement rate control in firmware. Drivers that don't use this will just get the default parameters. Signed-off-by: Toke Høiland-Jørgensen <toke@toke.dk> [remove currently unnecessary EXPORT_SYMBOL, fix kernel-doc, remove inline annotation] Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211/rate.c')
-rw-r--r--net/mac80211/rate.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/mac80211/rate.c b/net/mac80211/rate.c
index ea1f4315c521..76f303fda3ed 100644
--- a/net/mac80211/rate.c
+++ b/net/mac80211/rate.c
@@ -943,6 +943,8 @@ int rate_control_set_rates(struct ieee80211_hw *hw,
drv_sta_rate_tbl_update(hw_to_local(hw), sta->sdata, pubsta);
+ ieee80211_sta_set_expected_throughput(pubsta, sta_get_expected_throughput(sta));
+
return 0;
}
EXPORT_SYMBOL(rate_control_set_rates);
@@ -991,4 +993,3 @@ void rate_control_deinitialize(struct ieee80211_local *local)
local->rate_ctrl = NULL;
rate_control_free(local, ref);
}
-