On Mon, Dec 6, 2010 at 2:21 PM, Wade Fitzpatrick <wade.fitzpatrick@xxxxxxxxx> wrote: > I have 2 USB wireless dongles: > - Generic Realtek RTL8187 using rtl8187 driver > - Netgear WN111v2 [Atheros AR9001-U(2)NG] using ar9170usb driver > > Performance of the Netgear has degraded severely since updating to Arch > Linux kernel 2.6.36.1-3 from 2.6.35.4-2, also reported by > http://article.gmane.org/gmane.linux.kernel.wireless.general/59911 > > Note that I only installed and enabled wlan1 because wlan0 was performing so > badly. > > # lsusb -v -d 0bda:8187 > > Bus 002 Device 005: ID 0bda:8187 Realtek Semiconductor Corp. RTL8187 > Wireless Adapter > Device Descriptor: > bLength 18 > bDescriptorType 1 > bcdUSB 2.00 > bDeviceClass 0 (Defined at Interface level) > bDeviceSubClass 0 > bDeviceProtocol 0 > bMaxPacketSize0 64 > idVendor 0x0bda Realtek Semiconductor Corp. > idProduct 0x8187 RTL8187 Wireless Adapter > bcdDevice 1.00 > iManufacturer 1 Manufacturer_Realtek_RTL8187_ > iProduct 2 RTL8187_Wireless_LAN_Adapter > iSerial 3 001AEF0050E6 > bNumConfigurations 1 > Configuration Descriptor: > bLength 9 > bDescriptorType 2 > wTotalLength 39 > bNumInterfaces 1 > bConfigurationValue 1 > iConfiguration 4 Wireless Network Card > bmAttributes 0x80 > (Bus Powered) > MaxPower 500mA > Interface Descriptor: > bLength 9 > bDescriptorType 4 > bInterfaceNumber 0 > bAlternateSetting 0 > bNumEndpoints 3 > bInterfaceClass 0 (Defined at Interface level) > bInterfaceSubClass 0 > bInterfaceProtocol 0 > iInterface 5 Bulk-IN,Bulk-OUT,Bulk-OUT > Endpoint Descriptor: > bLength 7 > bDescriptorType 5 > bEndpointAddress 0x81 EP 1 IN > bmAttributes 2 > Transfer Type Bulk > Synch Type None > Usage Type Data > wMaxPacketSize 0x0200 1x 512 bytes > bInterval 0 > Endpoint Descriptor: > bLength 7 > bDescriptorType 5 > bEndpointAddress 0x02 EP 2 OUT > bmAttributes 2 > Transfer Type Bulk > Synch Type None > Usage Type Data > wMaxPacketSize 0x0200 1x 512 bytes > bInterval 0 > Endpoint Descriptor: > bLength 7 > bDescriptorType 5 > bEndpointAddress 0x03 EP 3 OUT > bmAttributes 2 > Transfer Type Bulk > Synch Type None > Usage Type Data > wMaxPacketSize 0x0200 1x 512 bytes > bInterval 0 > Device Qualifier (for other device speed): > bLength 10 > bDescriptorType 6 > bcdUSB 2.00 > bDeviceClass 0 (Defined at Interface level) > bDeviceSubClass 0 > bDeviceProtocol 0 > bMaxPacketSize0 64 > bNumConfigurations 1 > Device Status: 0x0000 > (Bus Powered) > > # lsusb -v -d 0846:9001 > > Bus 002 Device 004: ID 0846:9001 NetGear, Inc. WN111(v2) RangeMax Next > Wireless [Atheros AR9001U-(2)NG] > Device Descriptor: > bLength 18 > bDescriptorType 1 > bcdUSB 2.00 > bDeviceClass 255 Vendor Specific Class > bDeviceSubClass 255 Vendor Specific Subclass > bDeviceProtocol 255 Vendor Specific Protocol > bMaxPacketSize0 64 > idVendor 0x0846 NetGear, Inc. > idProduct 0x9001 WN111(v2) RangeMax Next Wireless [Atheros > AR9001U-(2)NG] > bcdDevice 1.06 > iManufacturer 16 ATHER > iProduct 32 USB2.0 WLAN > iSerial 48 12345 > bNumConfigurations 1 > Configuration Descriptor: > bLength 9 > bDescriptorType 2 > wTotalLength 46 > bNumInterfaces 1 > bConfigurationValue 1 > iConfiguration 0 > bmAttributes 0x80 > (Bus Powered) > MaxPower 500mA > Interface Descriptor: > bLength 9 > bDescriptorType 4 > bInterfaceNumber 0 > bAlternateSetting 0 > bNumEndpoints 4 > bInterfaceClass 255 Vendor Specific Class > bInterfaceSubClass 0 > bInterfaceProtocol 0 > iInterface 0 > Endpoint Descriptor: > bLength 7 > bDescriptorType 5 > bEndpointAddress 0x01 EP 1 OUT > bmAttributes 2 > Transfer Type Bulk > Synch Type None > Usage Type Data > wMaxPacketSize 0x0200 1x 512 bytes > bInterval 0 > Endpoint Descriptor: > bLength 7 > bDescriptorType 5 > bEndpointAddress 0x82 EP 2 IN > bmAttributes 2 > Transfer Type Bulk > Synch Type None > Usage Type Data > wMaxPacketSize 0x0200 1x 512 bytes > bInterval 0 > Endpoint Descriptor: > bLength 7 > bDescriptorType 5 > bEndpointAddress 0x83 EP 3 IN > bmAttributes 3 > Transfer Type Interrupt > Synch Type None > Usage Type Data > wMaxPacketSize 0x0040 1x 64 bytes > bInterval 1 > Endpoint Descriptor: > bLength 7 > bDescriptorType 5 > bEndpointAddress 0x04 EP 4 OUT > bmAttributes 3 > Transfer Type Interrupt > Synch Type None > Usage Type Data > wMaxPacketSize 0x0040 1x 64 bytes > bInterval 1 > Device Qualifier (for other device speed): > bLength 10 > bDescriptorType 6 > bcdUSB 2.00 > bDeviceClass 255 Vendor Specific Class > bDeviceSubClass 255 Vendor Specific Subclass > bDeviceProtocol 255 Vendor Specific Protocol > bMaxPacketSize0 64 > bNumConfigurations 1 > Device Status: 0x0000 > (Bus Powered) > > # iwconfig > lo no wireless extensions. > > eth0 no wireless extensions. > > wlan0 IEEE 802.11bgn ESSID:"waddles" > Mode:Managed Frequency:2.412 GHz Access Point: 00:22:3F:07:42:F3 > Bit Rate=117 Mb/s Tx-Power=20 dBm > Retry long limit:7 RTS thr:off Fragment thr:off > Encryption key:off > Power Management:off > Link Quality=34/70 Signal level=-76 dBm > Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 > Tx excessive retries:0 Invalid misc:0 Missed beacon:0 > > wlan1 IEEE 802.11bg ESSID:"waddles" > Mode:Managed Frequency:2.412 GHz Access Point: 00:22:3F:07:42:F3 > Bit Rate=36 Mb/s Tx-Power=20 dBm > Retry long limit:7 RTS thr:off Fragment thr:off > Encryption key:off > Power Management:off > Link Quality=44/70 Signal level=-66 dBm > Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 > Tx excessive retries:0 Invalid misc:0 Missed beacon:0 > > tun0 no wireless extensions. > > My network looks like this: > > Linux Router/AP DSL Modem > (wlan0) 192.168.1.57 ---/--- 192.168.1.1 --- 192.168.0.1 --- Internet > (wlan1) 192.168.1.4 ---/--- > > Between the router and the modem is an ethernet crossover cable. > > # ping 192.168.0.1 > PING 192.168.0.1 (192.168.0.1) 56(84) bytes of data. > 64 bytes from 192.168.0.1: icmp_seq=1 ttl=63 time=2.23 ms > 64 bytes from 192.168.0.1: icmp_seq=2 ttl=63 time=2.11 ms > 64 bytes from 192.168.0.1: icmp_seq=3 ttl=63 time=1.88 ms > ^C > --- 192.168.0.1 ping statistics --- > 3 packets transmitted, 3 received, 0% packet loss, time 2002ms > rtt min/avg/max/mdev = 1.882/2.076/2.235/0.146 ms > > # route add -host 192.168.0.1 gw 192.168.1.1 dev wlan0 > > # netstat -nr > Kernel IP routing table > Destination Gateway Genmask Flags MSS Window irtt > Iface > 192.168.0.1 192.168.1.1 255.255.255.255 UGH 0 0 0 > wlan0 > 192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 > wlan1 > 192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 > wlan0 > 0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 > wlan1 > > # ping 192.168.0.1 > PING 192.168.0.1 (192.168.0.1) 56(84) bytes of data. > 64 bytes from 192.168.0.1: icmp_seq=1 ttl=63 time=158 ms > 64 bytes from 192.168.0.1: icmp_seq=2 ttl=63 time=168 ms > 64 bytes from 192.168.0.1: icmp_seq=3 ttl=63 time=162 ms > 64 bytes from 192.168.0.1: icmp_seq=4 ttl=63 time=170 ms > 64 bytes from 192.168.0.1: icmp_seq=5 ttl=63 time=178 ms > 64 bytes from 192.168.0.1: icmp_seq=6 ttl=63 time=166 ms > 64 bytes from 192.168.0.1: icmp_seq=7 ttl=63 time=166 ms > 64 bytes from 192.168.0.1: icmp_seq=8 ttl=63 time=155 ms > 64 bytes from 192.168.0.1: icmp_seq=9 ttl=63 time=434 ms > 64 bytes from 192.168.0.1: icmp_seq=10 ttl=63 time=154 ms > 64 bytes from 192.168.0.1: icmp_seq=11 ttl=63 time=174 ms > 64 bytes from 192.168.0.1: icmp_seq=12 ttl=63 time=161 ms > 64 bytes from 192.168.0.1: icmp_seq=13 ttl=63 time=147 ms > 64 bytes from 192.168.0.1: icmp_seq=14 ttl=63 time=170 ms > 64 bytes from 192.168.0.1: icmp_seq=15 ttl=63 time=161 ms > 64 bytes from 192.168.0.1: icmp_seq=16 ttl=63 time=190 ms > 64 bytes from 192.168.0.1: icmp_seq=17 ttl=63 time=218 ms > 64 bytes from 192.168.0.1: icmp_seq=18 ttl=63 time=166 ms > 64 bytes from 192.168.0.1: icmp_seq=19 ttl=63 time=514 ms > 64 bytes from 192.168.0.1: icmp_seq=20 ttl=63 time=177 ms > 64 bytes from 192.168.0.1: icmp_seq=21 ttl=63 time=144 ms > 64 bytes from 192.168.0.1: icmp_seq=22 ttl=63 time=191 ms > 64 bytes from 192.168.0.1: icmp_seq=23 ttl=63 time=175 ms > 64 bytes from 192.168.0.1: icmp_seq=24 ttl=63 time=156 ms > 64 bytes from 192.168.0.1: icmp_seq=25 ttl=63 time=947 ms > 64 bytes from 192.168.0.1: icmp_seq=26 ttl=63 time=1833 ms > 64 bytes from 192.168.0.1: icmp_seq=27 ttl=63 time=2196 ms > 64 bytes from 192.168.0.1: icmp_seq=28 ttl=63 time=1542 ms > 64 bytes from 192.168.0.1: icmp_seq=29 ttl=63 time=816 ms > 64 bytes from 192.168.0.1: icmp_seq=30 ttl=63 time=3045 ms > 64 bytes from 192.168.0.1: icmp_seq=31 ttl=63 time=3181 ms > 64 bytes from 192.168.0.1: icmp_seq=32 ttl=63 time=2287 ms > 64 bytes from 192.168.0.1: icmp_seq=33 ttl=63 time=1496 ms > 64 bytes from 192.168.0.1: icmp_seq=34 ttl=63 time=687 ms > 64 bytes from 192.168.0.1: icmp_seq=35 ttl=63 time=173 ms > ^C > --- 192.168.0.1 ping statistics --- > 35 packets transmitted, 35 received, 0% packet loss, time 34037ms > rtt min/avg/max/mdev = 144.678/653.604/3181.758/855.953 ms, pipe 4 > > NOTE --- The higher ping times occurred when downloading a 39kB image file. > > # route del -host 192.168.0.1 gw 192.168.1.1 dev wlan0 > > # ping 192.168.0.1 > PING 192.168.0.1 (192.168.0.1) 56(84) bytes of data. > 64 bytes from 192.168.0.1: icmp_seq=1 ttl=63 time=2.37 ms > 64 bytes from 192.168.0.1: icmp_seq=2 ttl=63 time=2.10 ms > 64 bytes from 192.168.0.1: icmp_seq=3 ttl=63 time=1.96 ms > 64 bytes from 192.168.0.1: icmp_seq=4 ttl=63 time=2.38 ms > ^C > --- 192.168.0.1 ping statistics --- > 4 packets transmitted, 4 received, 0% packet loss, time 3003ms > rtt min/avg/max/mdev = 1.964/2.206/2.388/0.187 ms > > I have also tried using the carl9170 driver (2010_12_02) with > compat-wireless and carl9170-fw (1.9.1-1) but I found 'iwconfig' would > segfault when it tried to display ath0. Can you please try with ath9k driver with the same compat wireless.Are you still seeing poor performance? > > Can somebody help me debug it further please? > -- > To unsubscribe from this list: send the line "unsubscribe linux-wireless" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
