On 31 October 2014 20:00, Evgeniy Dushistov <[email protected]> wrote: > 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?
We have some improvements for HT-PHY (BCM4331) in 3.18-rc1 (and newer). Could you try it? b43 is still limited to 802.11g speeds, but I hope it will be better than 3.18 Mb/s. -- Rafał _______________________________________________ b43-dev mailing list [email protected] http://lists.infradead.org/mailman/listinfo/b43-dev
