[Bug 263015] iwlwifi: huge drop in driver performance on 13.1-RC1

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=263015

--- Comment #2 from Patricio Villar <patovm04@gmail.com> ---
(In reply to Bjoern A. Zeeb from comment #1)
Well, on 13.1-RC1 it actually fails to associate several times, but eventually
does connect (probably thanks to wpa_gui retrying over and over again or
something like that). Then a manual restart of dhclient gets me an IP address
and I'm able to browse the web.

I measured the download speed with fast.com. Maybe it's not the most precise
way to do it but the difference is quite noticeable. It's now always between
1.5 - 2.4 mbps, while on 13.1-BETA3 it was in the range between 16 - 18 mbps.

As for 13.1-BETA1, I didn't really run it. I started testing 13.1 at BETA3, so
that's my only point of comparison. And BETA3 seemed to work pretty well...


Output of "ifconfig -v wlan0":

wlan0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        ether 8c:c6:81:e7:90:14
        inet 192.168.1.128 netmask 0xffffff00 broadcast 192.168.1.255
        groups: wlan
        ssid "PAVR 5G" channel 149 (5745 MHz 11a) bssid cc:ed:dc:80:85:79
        regdomain FCC country US anywhere -ecm authmode WPA2/802.11i -wps
        -tsn privacy ON deftxkey UNDEF
        AES-CCM 2:128-bit
        powersavemode OFF powersavesleep 100 txpower 23 txpowmax 50.0 -dotd
        rtsthreshold 2346 fragthreshold 2346 bmiss 7
        11a     ucast NONE    mgmt  6 Mb/s mcast  6 Mb/s maxretry 6
        11b     ucast NONE    mgmt  1 Mb/s mcast  1 Mb/s maxretry 6
        11g     ucast NONE    mgmt  1 Mb/s mcast  1 Mb/s maxretry 6
        scanvalid 60 -bgscan bgscanintvl 300 bgscanidle 250
        roam:11a     rssi    7dBm rate 12 Mb/s
        roam:11b     rssi    7dBm rate  1 Mb/s
        roam:11g     rssi    7dBm rate  5 Mb/s
        -pureg protmode CTS -ht -htcompat -ampdu ampdulimit 64k
        ampdudensity 4 -amsdu -shortgi htprotmode RTSCTS -puren -smps -rifs
        -stbc -ldpc -uapsd -vht -vht40 -vht80 -vht160 -vht80p80 wme -burst
        -dwds roaming MANUAL bintval 100
        AC_BE cwmin  4 cwmax 10 aifs  3 txopLimit   0 -acm ack
              cwmin  4 cwmax 10 aifs  3 txopLimit   0 -acm
        AC_BK cwmin  4 cwmax 10 aifs  7 txopLimit   0 -acm ack
              cwmin  4 cwmax 10 aifs  7 txopLimit   0 -acm
        AC_VI cwmin  3 cwmax  4 aifs  2 txopLimit  94 -acm ack
              cwmin  3 cwmax  4 aifs  2 txopLimit  94 -acm
        AC_VO cwmin  2 cwmax  3 aifs  2 txopLimit  47 -acm ack
              cwmin  2 cwmax  3 aifs  2 txopLimit  47 -acm
        parent interface: iwlwifi0
        media: IEEE 802.11 Wireless Ethernet OFDM/36Mbps mode 11a
        status: associated
        nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>



Relevant bits of /etc/rc.conf:

wlans_iwlwifi0="wlan0"
ifconfig_wlan0="WPA DHCP"
background_dhclient_wlan0="YES"
defaultroute_delay="0"
defaultroute_carrier_delay="0"

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