Performance of AR9287

[Derrick Edwards]

	Hi,
I am utilizing an mini PCIE AR9287 mini PCI-E.  It is not performing as 
expected thus far. I utilized iperf to test speed from laptops (both FreeBSD  
and Windows) to local default gateway. The results are show below with the 
first result being executed from the Windows Laptop and FreeBSD afterwards. 
Are these results to be expected? 

Derrick

Windows

Server listening on TCP port 5001
TCP window size: 64.0 KByte (default)
------------------------------------------------------------
[  4] local 192.168.15.3 port 5001 connected with 192.168.15.153 port 58137
------------------------------------------------------------
Client connecting to 192.168.15.153, TCP port 5001
TCP window size: 56.5 KByte (default)
------------------------------------------------------------
[  6] local 192.168.15.3 port 49723 connected with 192.168.15.153 port 5001
Waiting for server threads to complete. Interrupt again to force quit.
[ ID] Interval       Transfer     Bandwidth
[  4]  0.0-10.0 sec  14.3 MBytes  12.0 Mbits/sec
[  6]  0.0-10.0 sec  74.4 MBytes  62.4 Mbits/sec


FreeBSD 10.0-CURRENT #0: Thu Sep 20 16:22:56 EDT 2012

Server listening on TCP port 5001
TCP window size: 64.0 KByte (default)
------------------------------------------------------------
[  4] local 192.168.15.3 port 5001 connected with 192.168.15.238 port 44678
------------------------------------------------------------
Client connecting to 192.168.15.238, TCP port 5001
TCP window size: 32.5 KByte (default)
------------------------------------------------------------
[  6] local 192.168.15.3 port 40554 connected with 192.168.15.238 port 5001
Waiting for server threads to complete. Interrupt again to force quit.
[ ID] Interval       Transfer     Bandwidth
[  4]  0.0-10.0 sec  74.4 MBytes  62.3 Mbits/sec
[  6]  0.0-10.1 sec  9.87 MBytes  8.21 Mbits/sec



wlan0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        ether 1c:65:9d:ab:18:6f
        inet 192.168.15.238 netmask 0xffffff00 broadcast 192.168.15.255 
        nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
        media: IEEE 802.11 Wireless Ethernet MCS mode 11ng
        status: associated
        ssid datdude channel 1 (2412 MHz 11g ht/40+) bssid 10:bf:48:d9:1e:a0
        regdomain FCC country US indoor ecm authmode WPA2/802.11i privacy ON
        deftxkey UNDEF AES-CCM 2:128-bit txpower 30 bmiss 7 scanvalid 60
        protmode CTS ampdulimit 64k ampdudensity 8 shortgi wme burst
        roaming MANUAL

./athstats 
495670       data frames received
605640       data frames transmit
1129         tx frames with an alternate rate
21720        short on-chip tx retries
15941        long on-chip tx retries
34           tx failed 'cuz too many retries
428          mib overflow interrupts
9            tx linearized to cluster
MCS4         current transmit rate
1            watchdog timeouts
12           beacon miss interrupts
37           tx failed 'cuz destination filtered
21042        rx failed 'cuz of bad CRC
7            rx failed 'cuz decryption
5            rx failed 'cuz of PHY err
    5            illegal service
354          periodic calibrations
-0/+0        TDMA slot adjust (usecs, smoothed)
58           rssi of last ack
48           avg recv rssi
-96          rx noise floor
4            phantom beacon misses
237          tx frames through raw api
303067       A-MPDU sub-frames received
136445       Half-GI frames received
321349       40MHz frames received
4339         CRC errors for non-last A-MPDU subframes
179          CRC errors for last subframe in an A-MPDU
128845       Frames transmitted with HT Protection
69601        Number of frames retransmitted in software
556475       A-MPDU sub-frame TX attempt success
69579        A-MPDU sub-frame TX attempt failures
6            A-MPDU TX frame failures
2            first step level
1            OFDM weak signal detect
140          ANI increased noise immunity
140          ANI decrease noise immunity
1            ANI increased spur immunity
1            ANI decrease spur immunity
127          ANI disabled OFDM weak signal detect
127          ANI disabled CCK weak signal threshold
2            ANI increased first step level
251877       cumulative OFDM phy error count
348293       cumulative CCK phy error count
431          ANI forced listen time to zero
15583        missing ACK's
23402        RTS without CTS
94745        successful RTS
77637        bad FCS
102509       beacons received
66           average rssi (beacons only)
59           average rssi (all rx'd frames)
60           average rssi (ACKs only)
Antenna profile:
[0] tx    87529 rx      100
[1] tx        0 rx   495570



ath0 at pci0:2:0:0:        class=0x028000 card=0x30a417aa chip=0x002e168c 
rev=0x01 hdr=0x00
    vendor     = 'Atheros Communications Inc.'
    device     = 'AR9287 Wireless Network Adapter (PCI-Express)'
    class      = network
    bar   [10] = type Memory, range 64, base 0xb8500000, size 65536, enabled
    cap 01[40] = powerspec 3  supports D0 D1 D3  current D0
    cap 05[50] = MSI supports 1 message 
    cap 10[60] = PCI-Express 2 legacy endpoint max data 128(128) link x1(x1)
ecap 0001[100] = AER 1 0 fatal 0 non-fatal 0 corrected
ecap 0002[140] = VC 1 max VC0
ecap 0003[160] = Serial 1 001517ffff241412
ecap 0004[170] = Power Budgeting 1