The number of entries in the node cache is currently capped to 100.
This limit is outdated. Modern hardware like iwm(4) 8265 supports 46
distinct channels (1-13, 36-165) each of which can host multiple APs.
The limit is easily reached at 36c6 which makes use of much of the
available spectrum and provides at least 3 SSIDs on each channel:
$ ifconfig iwm0 scan | grep nwid | wc -l
96
So we may be missing out on the best AP to use.
The cache uses an RB tree so performance impact should be negligible.
ok?
diff 5181eb992cbbf64c135f177197957b0e0b427e21 /usr/src
blob - 7fada592641e683415ffc42cded1c8b27bf39c5c
file + sys/net80211/ieee80211_node.h
--- sys/net80211/ieee80211_node.h
+++ sys/net80211/ieee80211_node.h
@@ -39,7 +39,7 @@
#define IEEE80211_TRANS_WAIT 5 /* transition wait */
#define IEEE80211_INACT_WAIT 5 /* inactivity timer
interval */
#define IEEE80211_INACT_MAX (300/IEEE80211_INACT_WAIT)
-#define IEEE80211_CACHE_SIZE 100
+#define IEEE80211_CACHE_SIZE 512
#define IEEE80211_CACHE_WAIT 30
#define IEEE80211_INACT_SCAN 10 /* for station mode */
