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

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Message-ID: <f488382f0809200821m6fe355feu2d9fb99ac3c7f712@mail.gmail.com>
Date:	Sat, 20 Sep 2008 08:21:09 -0700
From:	"Steven Noonan" <steven@...inklabs.net>
To:	"Luis R. Rodriguez" <lrodriguez@...eros.com>
Cc:	linux-wireless <linux-wireless@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	"Senthilkumar Balasubramanian" 
	<Senthilkumar.Balasubramanian@...eros.com>,
	"ath9k-devel@...ts.ath9k.org" <ath9k-devel@...ts.ath9k.org>,
	"Luis Rodriguez" <Luis.Rodriguez@...eros.com>,
	"Ingo Molnar" <mingo@...e.hu>
Subject: Re: [ath9k-devel] ath9k: massive unexplained latency in 2.6.27 (rc5, rc6, probably others)

On Fri, Sep 19, 2008 at 8:29 PM, Steven Noonan <steven@...inklabs.net> wrote:
> And here's the change as I unload and reload ath9k:
>
> [...]
> 20:21:38          sum  20138.83
> 20:21:40          sum  21576.09
> 20:21:41          sum  17678.38
> 20:21:42          sum  19834.34
> 20:21:43          sum  19845.10
> 20:21:44          sum  19470.00
> 20:21:45          sum   9273.00  <--- ath9k unloaded/reloaded
> 20:21:46          sum    187.00
> 20:21:47          sum   1066.00
> 20:21:48          sum    610.00
> 20:21:49          sum    106.93
> 20:21:50          sum    670.00
> 20:21:51          sum    742.00
> 20:21:52          sum    781.00
> Average:          sum  19562.56
>

I think it might help if you can see the .sar file yourself. I've
uploaded a gzipped copy (great compression ratio in this case for
merely using gzip!).

http://www.uplinklabs.net/~tycho/linux/irqlog-storm.sar.gz

- Steven
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