Date: Mon, 1 Apr 2013 22:10:41 +0000 From: Gleb Romanov <gromanov@hellok.org> To: "freebsd-wireless@freebsd.org" <freebsd-wireless@freebsd.org> Subject: 802.11n performance for AR9280 Message-ID: <1ca04345430c497abdd21b72680e4e0b@BN1PR05MB060.namprd05.prod.outlook.com>
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Hello,
I have a question about 802.11n performance for AR9280 ( my card is Ubiquit=
i SR71E ) in hostap mode. To measure performance, I'm looking at the downlo=
ad speeds from my file server (Samba) through a FreeBSD AP to a laptop with=
Centrino 6300 (agn 3x3:3).
I see 3-4 MBytes/s on the 2.4 GHz band (using ht/20 or ht/40 - doesn't matt=
er) and around 5-6 MB/s on the 5 GHz band (ht/40).=20
The laptop is running Win 7 and can do 8-9 MB/s with a commercial AP (2.4 G=
Hz ht/20 2x2:2)
I run 9.1-RELEASE GENERIC and the question is this is the expected performa=
nce (from 9.1 RELEASE ) or I'm just doing something wrong? May be bad anten=
nas or wires?
If it is expected and I need to switch to HEAD to do better, can I only upd=
ate the "ATH_module_releated_stuff" and leave the rest of the base untouche=
d?
Any comments would be helpful!
Gleb
-------
Here is some info about the system:
Right now it is configured for 2.4 GHz simply because of the range. With 5 =
GHz I need to in the same room with the AP to get the speeds I mentioned.
uname -a
FreeBSD fwall 9.1-RELEASE FreeBSD 9.1-RELEASE #0 r243825: Tue Dec 4 09:23:=
10 UTC 2012 root@farrell.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC =
amd64
pciconf -lv
ath0@pci0:3:0:0: class=3D0x028000 card=3D0x4e050777 chip=3D0x002a168=
c rev=3D0x01 hdr=3D0x00
vendor =3D 'Atheros Communications Inc.'
device =3D 'AR928X Wireless Network Adapter (PCI-Express)'
class =3D network
/etc/rc.conf
wlans_ath0=3D"wlan0"
create_args_wlan0=3D"wlanmode hostap"
ifconfig_wlan0=3D"apbridge mode 11ng ht channel 3:ht/40"
hostapd_enable=3D"YES" #for wlan0
hostapd_program=3D"/usr/local/sbin/hostapd" #run from port instead of bas=
e
ifconfig
wlan0: flags=3D8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric =
0 mtu 1500
ether 00:15:6d:85:25:13
nd6 options=3D29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
media: IEEE 802.11 Wireless Ethernet autoselect mode 11ng <hostap>
status: running
ssid badaboom-n channel 3 (2422 MHz 11g ht/40+) bssid 00:15:6d:85:2=
5:13
country US ecm authmode WPA2/802.11i privacy MIXED deftxkey 2
AES-CCM 2:128-bit AES-CCM 3:128-bit txpower 27 scanvalid 60
protmode CTS -htcompat -ampdu ampdulimit 64k ampdudensity 8 -amsdu
smps wme burst dtimperiod 1 -dfs
/etc/hostapd.conf:=20
ht_capab=3D[HT40+][SHORT-GI-20][SHORT-GI-40][TX-STBC][RX-STBC12][DELAYED-BA=
][MAX-AMSDU-7935][DSSS_CCK-40][LDPC][GF][SMPS-DYNAMIC][PSMP][LSIG-TXOP-PROT=
]
(Here I used all available options. I don't see any difference between usin=
g the line and commenting it out. Huh?)
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