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

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Message-ID: <f488382f0809201422rdabeff4g435bf3d4a7e9fa3@mail.gmail.com>
Date:	Sat, 20 Sep 2008 14:22:46 -0700
From:	"Steven Noonan" <steven@...inklabs.net>
To:	"Luis R. Rodriguez" <lrodriguez@...eros.com>
Cc:	"Johannes Berg" <johannes@...solutions.net>,
	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 Sat, Sep 20, 2008 at 2:03 PM, Luis R. Rodriguez
<lrodriguez@...eros.com> wrote:
>
> OK so yeah you have an interrupt storm, this is evident.

Indeedy.

>
> Do you think there is a way you can try to trigger the interrupt storm
> so it happens < than after 7 hours or however long its taking you? If
> so then it'd be good to get your debug out using the interrupt debug.
> If that's not useful then we can enable all debug stuff (file will be
> huge).

It's apparently 7 idle hours and ~1-2 hours when I'm actively browsing
the web. I don't know what in particular triggers it, so I guess I'd
just need to enable debug logging and then start running through all
my webcomics, or perhaps perusing Wikipedia.

> Try turning on the microwave, turn on all  your bluetooth devices, use
> your 2.4 GHz wireless phone, use your xbox 360 controllers and ps3
> controllers all at once :D

Heh. I don't have an Xbox 360 or PS3 (sad, I know). Do have several
2.4GHz phones. ;)
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