On Feb 25, 2009, at 5:00 PM, Larry Finger wrote:
Francesco and Lorenzo,
In my latest test, I cut the RX and TX queue depths to 32 and ran my
usual
stress test. This time I logged whenever there was an increase in
the depth of
the txstatus queue, and whenever the queue depth was 16. The results
were as
follows:
Feb 24 19:27:08 mtech kernel: b43: Max Queue depth is now 2
Feb 24 19:27:12 mtech kernel: b43: Max Queue depth is now 3
Feb 24 19:27:12 mtech kernel: b43: Max Queue depth is now 4
Feb 24 19:27:12 mtech kernel: b43: Max Queue depth is now 5
Feb 24 19:27:12 mtech kernel: b43: Max Queue depth is now 6
Feb 24 19:27:12 mtech kernel: b43: Max Queue depth is now 7
Feb 24 19:27:12 mtech kernel: b43: Max Queue depth is now 8
Feb 24 19:27:12 mtech kernel: b43: Max Queue depth is now 9
Feb 24 19:27:12 mtech kernel: b43: Max Queue depth is now 10
Feb 24 19:28:46 mtech kernel: b43: Max Queue depth is now 11
Feb 25 00:07:19 mtech kernel: b43: Max Queue depth is now 12
Feb 25 00:07:19 mtech kernel: b43: Max Queue depth is now 13
Feb 25 00:09:12 mtech kernel: b43: Max Queue depth is now 14
Feb 25 00:09:50 mtech kernel: b43: Max Queue depth is now 15
Feb 25 00:09:50 mtech kernel: b43: Max Queue depth is now 16
Feb 25 00:09:50 mtech kernel: b43: Max queue depth at 16
Feb 25 00:09:54 mtech kernel: b43: Max queue depth at 16
Feb 25 00:10:55 mtech kernel: b43: Max queue depth at 16
Feb 25 00:26:24 mtech kernel: eth1: No ProbeResp from current AP
00:1a:70:46:ba:b1 - assume out of range
The 00:26:24 event was the interface going offline. That happens with
proprietary firmware, thus I think that problem is with the driver,
rather than
the firmware. In any case, I got no out-of-order cookies or poisoned
skb's.
There were no dropped packets nor PHY transmission errors. The above
list is all
the b43 messages in the log.
Larry, (pardon me if you answered this question) have you tried to see
what happens with the halved queue when using the open firmware?
Cheers,
-FG
I have reset the RX queue depth to the original value of 64 and have
started
another test. I would expect this change to have no effect, but I'll
keep you
informed.
Larry
-------
Francesco Gringoli, PhD - Assistant Professor
Dept. of Electrical Engineering for Automation
University of Brescia
via Branze, 38
25123 Brescia
ITALY
Ph: ++39.030.3715843
FAX: ++39.030.380014
WWW: http://www.ing.unibs.it/~gringoli
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