Date: Sun, 24 Feb 2002 11:54:25 +0200 (EET) From: Adrian Penisoara <ady@usv.ro> To: freebsd-isp@freebsd.org, freebsd-network@freebsd.org Subject: Lucent Avaya Comm 11Mbps wireless eating all CPU Message-ID: <Pine.BSF.4.10.10202241132240.73481-200000@ady.warpnet.ro>
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Content-Type: TEXT/PLAIN; charset=US-ASCII
Hi,
I have a PCMCIA Lucent Avaya Communication Silver 11Mbps wireless card
(hosted on a PCI PC Card bus) installed on a gateway with a Pentium
233Mhz MMX CPU and this card eats all CPU at about 3Mbps (with >90% of
the time spent in interrupts).
The strange thing is that it doesn't really generate that many
interrupts (about 100 interrupts per second, versus ~300 total
interrupts per second). The card is attached (through the pccardd
daemon) as a wi0 interface and has WEP encription (40bit key) enabled.
My hypothesis is that the CPU is hogged by the WEP encryption
calculations done by the driver in the interrupt handler or it might be
something wrong with the driver.
Has anyone seen this issue ? Is it normal ? Could a better CPU (e.g.
700Mh Duron) handle the whole 11Mbps bandwidth ?
Some background:
[ifconfig wi0]
wi0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
inet xx.xx.xx.xx netmask 0xfffffff0 broadcast xx.xx.xx.xx
ether 00:02:2d:22:2c:3b
media: IEEE 802.11 Wireless Ethernet autoselect (DS/11Mbps)
status: associated
ssid xxxx 1:xxxx
stationname "FreeBSD WaveLAN/IEEE node"
channel 10 authmode NONE powersavemode OFF powersavesleep 100
wepmode MIXED weptxkey 1
wepkey 1:64-bit
[wicontrol -i wi0]
NIC serial number: [ 01UT21446483 ]
Station name: [ FreeBSD WaveLAN/IEEE node ]
SSID for IBSS creation: [ xxxx ]
Current netname (SSID): [ xxxx ]
Desired netname (SSID): [ xxxx ]
Current BSSID: [ 00:02:2d:30:f1:a2 ]
Channel list: [ 2047 ]
IBSS channel: [ 10 ]
Current channel: [ 10 ]
Comms quality/signal/noise: [ 33 88 55 ]
Promiscuous mode: [ Off ]
Port type (1=BSS, 3=ad-hoc): [ 1 ]
MAC address: [ 00:02:2d:22:2c:3b ]
TX rate (selection): [ 3 ]
TX rate (actual speed): [ 11 ]
RTS/CTS handshake threshold: [ 2347 ]
Create IBSS: [ Off ]
Access point density: [ 1 ]
Power Mgmt (1=on, 0=off): [ 0 ]
Max sleep time: [ 100 ]
WEP encryption: [ On ]
TX encryption key: [ 1 ]
Encryption keys: [ xxxxx ][ ][ ][ ]
[console.log]
Feb 23 13:15:14 xxx /kernel: Feb 23 13:15:14 fw pccardd[57]: wi0: Avaya
Communication (Avaya Wireless PC Card) remov
ed.
Feb 23 13:15:24 xxx /kernel: Feb 23 13:15:24 fw pccardd[57]: Card "Avaya
Communication"("Avaya Wireless PC Card") [V
ersion 01.01] [] matched "Avaya Communication" ("Avaya Wireless PC
Card") [(null)] [(null)]
Feb 23 13:15:29 xxx /kernel: Feb 23 13:15:29 fw pccardd[57]: wi0: Avaya
Communication (Avaya Wireless PC Card) inser
ted.
Feb 23 13:56:28 xxx /kernel: Feb 23 13:56:28 fw pccardd[57]: wi0: Avaya
Communication (Avaya Wireless PC Card) remov
ed.
Feb 23 14:02:35 xxx /kernel: Feb 23 14:02:35 fw pccardd[57]: Card "Avaya
Communication"("Avaya Wireless PC Card") [V
ersion 01.01] [] matched "Avaya Communication" ("Avaya Wireless PC
Card") [(null)] [(null)]
Feb 23 14:02:40 xxx /kernel: Feb 23 14:02:40 fw pccardd[57]: wi0: Avaya
Communication (Avaya Wireless PC Card) inser
ted.
Dmesg attached. If further details are needed please ask.
Thank you,
Ady (@usv.ro)
net/sys admin
DCTI, USV
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