I think I have narrowed down some problems I see when I create
two STA interfaces on the same radio and associate with the
same AP.
I'm using wireless-testing plus some patches to the rx logic
I posted earlier.
It appears that the ath9k NIC does not transport AMPDUs properly,
and after a few seconds, it's backlog is exhausted and the queues
are stopped in ath_tx_start.
debugfs seems to agree:
[root@atom ~]# cat /debug/ath9k/phy0/xmit
BE BK VI VO
MPDUs Queued: 2 0 0 85
MPDUs Completed: 2 0 0 85
Aggregates: 0 0 0 0
AMPDUs Queued: 144 0 0 0
AMPDUs Completed: 20 0 0 0
AMPDUs Retried: 18 0 0 0
AMPDUs XRetried: 0 0 0 0
FIFO Underrun: 0 0 0 0
TXOP Exceeded: 0 0 0 0
TXTIMER Expiry: 0 0 0 0
DESC CFG Error: 0 0 0 0
DATA Underrun: 0 0 0 0
DELIM Underrun: 0 0 0 0
[root@atom ~]#
I can still receive packets on the interface, but nothing is
transmitted.
I tested against an a/b/g AP (instead of N), and it ran clean
for many minutes.
Any ideas how to debug this further?
Thanks,
Ben
--
Ben Greear <greearb@xxxxxxxxxxxxxxx>
Candela Technologies Inc http://www.candelatech.com
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