linux-kernel - Re: 20000+ wake-ups/second in 2.6.24. Bug?

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Message-ID: <20071202151231.GK15974@stusta.de>
Date:	Sun, 2 Dec 2007 16:12:31 +0100
From:	Adrian Bunk <bunk@...nel.org>
To:	Mark Lord <lkml@....ca>
Cc:	Arjan van de Ven <arjan@...radead.org>,
	"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>,
	Andrew Morton <akpm@...ux-foundation.org>, abelay@...ell.com,
	lenb@...nel.org, rjw@...k.pl, linux-kernel@...r.kernel.org,
	linux-acpi@...r.kernel.org
Subject: Re: 20000+ wake-ups/second in 2.6.24.   Bug?

On Sun, Dec 02, 2007 at 09:59:57AM -0500, Mark Lord wrote:
> Adrian Bunk wrote:
>> On Sat, Dec 01, 2007 at 06:43:39PM -0500, Mark Lord wrote:
>>> Mark Lord wrote:
>>>> Arjan van de Ven wrote:
>>>>> On Fri, 30 Nov 2007 22:31:17 -0500
>>>>> Mark Lord <lkml@....ca> wrote:
>>> ...
>>>>>> Speaking of which.. what's with powertop on 2.6.24 ???
>>>>>> It's gone from 100-200 wakeups/sec to 20000 wakeups/sec !!!!!!!
>>>>> ho hum.. Lenovo T61?
>>>>> I have some reports that that happens once in a while (but it's not
>>>>> limited to .24 and it's also real, it's not a powertop bug but it
>>>>> actually is waking up that much)..
>>>> ..
>>>>
>>>> No, it's my hefty Dell Inspiron 9400.
>>>>
>>>> And I just figured out the powertop:  it needed the kernel timers
>>>> patch from the powertop site that was originally for 2.6.21..
>>> ...
>>>
>>> Dagnabbit.. it's done it again.. went from 100-200 wakeups/sec
>>> back up to 20000+ wakeups/sec.  This time *with* the powertop patches in place.
>>
>> What is the status with an unpatched 2.6.23?
> ..
>
> More wakeups than without patching, but still on the order of hundreds
> of wakeups/sec; nowhere near the 20000+ wakeups/sec range when it goes wonky.

OK.

>> Please send the output of "dmesg -s 1000000" for both 2.6.23 and 2.6.24.
> ..
>
> Okay, I'll do a couple of reboots and collect that info for private email,
> and maybe post a diff of the two here.

Thanks for doing this.

But please send the dmesg output to the list - it's better when everyone 
who looks at this thread also sees all information.

> Cheers

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

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