Re: [ath9k-devel] ath9k: massive unexplained latency in 2.6.27 (rc5, rc6, probably others)

Steven Noonan
2008-09-21T01:48:19Z

On Sat, Sep 20, 2008 at 2:48 PM, Steven Noonan <steven@uplinklabs.net> wrote:
> On Sat, Sep 20, 2008 at 2:26 PM, Luis R. Rodriguez
> <lrodriguez@atheros.com> wrote:
>> On Sat, Sep 20, 2008 at 2:22 PM, Steven Noonan <steven@uplinklabs.net> wrote:
>>
>>> Heh. I don't have an Xbox 360 or PS3 (sad, I know). Do have several
>>> 2.4GHz phones. ;)
>>
>> Microwaves are the best to make the signal wet poop BTW, if you have
>> that option available. Not sure if we can trigger the device that way
>> but I'm just brainstorming here.
>>
>
> Well, I've got the thing set to ATH_DBG_ANY (I want this damn bug
> found!), which will certainly be *interesting*. In 5 minutes, the log
> has jumped 9 megabytes.
>
> I've also got sadc monitoring IRQs so I know for certain when the
> interrupt storm starts.
>
> I'll let you know how this goes.

OK, here's the time index at which it b0rked:

18:28:38 sum 1106.00
18:28:39 sum 1037.62
18:28:40 sum 1069.00
18:28:41 sum 1167.00
18:28:42 sum 1155.00
18:28:43 sum 1339.00
18:28:44 sum 18355.00
18:28:45 sum 17845.45
18:28:46 sum 15285.00
18:28:47 sum 17511.00
18:28:48 sum 17568.69
18:28:49 sum 17704.04
18:28:50 sum 18566.67
18:28:51 sum 18913.13

And the entire log of the minute 18:28 is here:
http://www.uplinklabs.net/~tycho/linux/18.28.00-59.log.gz

It looks pretty crazy.

- Steven