slow connection

[Evgeniy Dushistov]

Hi,

I used linux 3.16.3 and b43 driver with firmware version 784.2.
$iwconfig
wlp4s0    IEEE 802.11bg  ESSID:"some sid"
          Mode:Managed  Frequency:2.437 GHz  Access Point: 60:A4:4C:F0:DF:80
          Bit Rate=24 Mb/s   Tx-Power=20 dBm
          Retry short limit:7   RTS thr:off   Fragment thr:off
          Encryption key:off
          Power Management:off
          Link Quality=70/70  Signal level=-27 dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:18981  Invalid misc:16901   Missed beacon:0

$lspci -v
04:00.0 Network controller: Broadcom Corporation BCM4331 802.11a/b/g/n (rev 02)
        Subsystem: Apple Inc. AirPort Extreme
        Flags: bus master, fast devsel, latency 0, IRQ 17
        Memory at c1900000 (64-bit, non-prefetchable) [size=16K]
        Capabilities: [40] Power Management version 3
        Capabilities: [58] Vendor Specific Information: Len=78 <?>
        Capabilities: [48] MSI: Enable- Count=1/1 Maskable- 64bit+
        Capabilities: [d0] Express Endpoint, MSI 00
        Capabilities: [100] Advanced Error Reporting
        Capabilities: [13c] Virtual Channel
        Capabilities: [160] Device Serial Number dc-cb-e9-ff-ff-16-28-cf
        Capabilities: [16c] Power Budgeting <?>
        Kernel driver in use: bcma-pci-bridge
        Kernel modules: bcma

to test speed I download file from wifi router with usb disk.

Under linux I got:
time curl  'ftp://192.168.1.1/somefile' -o res
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 2147M  100 2147M    0     0   403k      0  1:30:52  1:30:52 --:--:--  478k

real    90m52.745s
user    1m1.120s
sys     1m22.670s


On the same notebook, at the same place, but under Mac OS X I got:
time curl 'ftp://192.168.1.1/somefile' -o res
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 2147M  100 2147M    0     0  8379k      0  0:04:22  0:04:22 --:--:-- 6801k

real	4m22.479s
user	0m9.149s
sys	0m31.209s

So it is 3.18 Mbit/s vs 71.57 MBit/s under the same conditions,
and the only difference is OS.

Any hints, how to speedup connection under linux?

-- 
/Evgeniy