From mboxrd@z Thu Jan 1 00:00:00 1970 From: Evgeniy Dushistov Date: Fri, 31 Oct 2014 22:00:18 +0300 Subject: slow connection Message-ID: <20141031190018.GA8295@fifteen> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: b43-dev@lists.infradead.org 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