[Madwifi-users] Interrupt problems in 11g-only master mode (AR5212).

[DOm <ang...@ti...>]

Hallo,

i start this new thread to try to discover what causes the problem.
Many of us have some instability and get system unresponsive when using
madwifi in 11g-only master mode. Someone suggested to investigate using
a system profile, but i'm not very used to these tools.
Anyway, i tried to use oprofile (http://oprofile.sf.net) to see what
causes the interrupt storm (at least _i_ think it is an interrupt
problem).

I use my pci card in master mode, but i have not a bridge setup, i route
packet on the wired lan using:
	sysctl -w net.ipv4.ip_forward=1

I turned on debug messages of dev.ath.debug to print interrupt
information with:
	sysctl -w dev.ath.debug=0x000000001000

under normal operation (ping or no manual action) the debug output is:
	ath_intr: status 0x10000
	ath_intr: status 0x40

repeatedly, but when the system become slow, that is when i try to
use the full bandwidth (for example using wget on the client), i get
this output:
	ath_intr: status 0x10000
	ath_beacon_tasklet: beacon queue 9 did not stop?

sometime happen that the system do not become slow but stop trasmitting
packets and output such a message:
	ath_hardstart: discard, no xmit buf

I'm not able to understand where the problem is from the system profiler
output, so i send you a file with a filtered output (only kernel and
ath* stuff). If it is not enough, please give me more instruction on how
to proceed.

In the second attached file there is a summary of my system, to help you
to know my machine. I made a script to generate such file and to add a
bit of provacy (masking mac addresses and ipv6 addresses, and wep keys),
if you are interested in such a dummy script i can post it, maybe it can
be useful for other bug reports.

I hope you can guess where is the problem.

Goodbye,
   ANgelus.