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From: David Brownell <david-b@pacbell.net>
To: Venki Pallipadi <venkatesh.pallipadi@intel.com>
Subject: Re: 2.6.25 regression: powertop says 120K wakeups/sec
Date: Fri, 28 Mar 2008 14:09:09 -0700
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Cc: Andrew Morton <akpm@linux-foundation.org>, linux-kernel@vger.kernel.org,
       "Rafael J. Wysocki" <rjw@sisk.pl>, linux-acpi@vger.kernel.org,
       Len Brown <lenb@kernel.org>
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On Friday 28 March 2008, Venki Pallipadi wrote:
> Can you send me the output of
> # grep . /sys/devices/system/cpu/cpu*/cpuidle/*/*
> with upstream kernel.

This is "upstream" to 3085354de635179d70c240e6d942bcbd1d93056c:

/sys/devices/system/cpu/cpu0/cpuidle/state0/desc:CPUIDLE CORE POLL IDLE
/sys/devices/system/cpu/cpu0/cpuidle/state0/latency:0
/sys/devices/system/cpu/cpu0/cpuidle/state0/name:C0
/sys/devices/system/cpu/cpu0/cpuidle/state0/power:4294967295
/sys/devices/system/cpu/cpu0/cpuidle/state0/time:0
/sys/devices/system/cpu/cpu0/cpuidle/state0/usage:0
/sys/devices/system/cpu/cpu0/cpuidle/state1/desc:<null>
/sys/devices/system/cpu/cpu0/cpuidle/state1/latency:0
/sys/devices/system/cpu/cpu0/cpuidle/state1/name:C1
/sys/devices/system/cpu/cpu0/cpuidle/state1/power:0
/sys/devices/system/cpu/cpu0/cpuidle/state1/time:2781727265
/sys/devices/system/cpu/cpu0/cpuidle/state1/usage:927242422

... as I mentioned, powertop says C2 doesn't get used any more,
moreover that only C0 ever gets used.  The "usage" seems to be
saying otherwise.


> Below is a test patch which should effectively revert commit bc71bec91f987
> Can you check with this patch on latest git and see whether things come back
> to normal.

I'll get back to you with results.

 
> Also, it will help if you can send the output of acpidump from this system.

Sent off-list.

- Dave

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