Re: ath9k and stuck xmit queue?

[Ben Greear <greearb@candelatech.com>]

On 01/04/2011 05:04 PM, Ben Greear wrote:
> I added a patch to my tree to print out some extra info,
> in particular the 'axq-stopped' bit. I notice that when
> I have 60 STA interfaces sometimes it seems to get stuck
> and cannot send any data. A printout of the debug in that
> case is below.

I found a similar scenario, but to me even weirder:

Note that the queue is stopped, but has no depth, and not
even any pending frames?

I do notice that the hw-tx-start is less than the number of
processed descriptors.  That seems to normally go along with
the tx-hang issues..perhaps caused by chip resets or similar?

hw-tx-start:             53128          0         0     37325
hw-tx-proc-desc:         53103          0         0     37200
txq-memory-address:   de70b3d0   de70b464  de70b33c  de70b2a8
axq-qnum:                    2          3         1         0
axq-depth:                   0          0         0         0
axq-ampdu_depth:             0          0         0         0
axq-stopped                  1          0         0         0
tx-in-progress               0          0         0         0
pending-frames               0          0         0         0
txq_headidx:                 0          0         0         0
txq_tailidx:                 0          0         0         0
axq_q empty:                   0          1         1         0
axq_acq empty:                 1          1         1         1
txq_fifo_pending:              1          1         1         1
txq_fifo[0] empty:             1          1         1         1
txq_fifo[1] empty:             1          1         1         1
txq_fifo[2] empty:             1          1         1         1
txq_fifo[3] empty:             1          1         1         1
txq_fifo[4] empty:             1          1         1         1
txq_fifo[5] empty:             1          1         1         1
txq_fifo[6] empty:             1          1         1         1
txq_fifo[7] empty:             1          1         1         1

Thanks,
Ben

-- 
Ben Greear <greearb@candelatech.com>
Candela Technologies Inc  http://www.candelatech.com