From: Arjan van de Ven <arjan at linux.intel.com>
To: powertop@lists.01.org
Subject: Re: [Powertop] regarding cpuidle stats
Date: Mon, 29 Jul 2013 06:09:12 -0700 [thread overview]
Message-ID: <51F66978.8070301@linux.intel.com> (raw)
In-Reply-To: CAKjcEiXF=FmKaUo6g_gW7s8R4hh5jjG-XpMQMm+A5eBez--Hwg@mail.gmail.com
[-- Attachment #1: Type: text/plain, Size: 503 bytes --]
On 7/29/2013 3:52 AM, remu kelly wrote:
> Hi powertop team,
> I have few questions about powertop as below:-
> 1) Does powertop use "<debugfs>/cpuidle/stats" for retriving the C state information.
no
it uses various kernel trace points to collect things as they happen
> 2) Is it possible that on "cat <debugfs>/cpuidle/stats" , we see the C3 state is having '0' count. but at same time powertop show the C3 state being hit?
I am not sure how well cpuidle stats work; never used them.
next reply other threads:[~2013-07-29 13:09 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-29 13:09 Arjan van de Ven [this message]
-- strict thread matches above, loose matches on Subject: below --
2013-07-29 13:34 [Powertop] regarding cpuidle stats Arjan van de Ven
2013-07-29 10:52 remu kelly
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