From: Chris Ferron <chris.e.ferron at linux.intel.com>
To: powertop@lists.01.org
Subject: Re: [Powertop] Powertop doesn't detects sleeping ARM cores
Date: Wed, 19 Sep 2012 08:15:59 -0700 [thread overview]
Message-ID: <5059E1AF.3010000@linux.intel.com> (raw)
In-Reply-To: 505981D3.7010403@samsung.com
[-- Attachment #1: Type: text/plain, Size: 1249 bytes --]
On 09/19/2012 01:26 AM, Igor Zhbanov wrote:
> Hi,
>
> Here is some notes to my previous post.
>
> I mean that only online cores are shown in /proc/cpuinfo.
> So the PowerTOP doesn't count currently offline ones.
> And you must run the PowerTOP on a heavy loaded system
> to let the PowerTOP see all CPU cores.
>
> Therefore it is impossible to run the PowerTOP before starting
> of heavy application to get information about all CPU cores.
>
> Probably the PowerTOP could cache CPU information in some file,
> so it will be possible to register trace events for all cores.
>
Off hand I don't have a good solution to help your ARM story. Your notes
are interesting and I agree this is something that ARM is going to need.
Do you have a complete solution you would like to purpose? I assume you
have done some hacking to get around this, but if you have taken that
and tuned it i suggest purposing the change. If you find a solution that
doesn't digress the Architectures, and corrects the ARM story then
please submit patches. I would be interested in seeing what you have
come up with.
I will try and look for a general solution, are there any other ARM
advocates on this list who would like to chime in?
-C
next reply other threads:[~2012-09-19 15:15 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-19 15:15 Chris Ferron [this message]
-- strict thread matches above, loose matches on Subject: below --
2012-09-20 10:55 [Powertop] Powertop doesn't detects sleeping ARM cores Igor Zhbanov
2012-09-20 10:42 Arjan van de Ven
2012-09-20 10:40 Igor Zhbanov
2012-09-20 9:57 Igor Zhbanov
2012-09-20 9:56 Arjan van de Ven
2012-09-20 9:43 Sergey Senozhatsky
2012-09-20 9:29 Igor Zhbanov
2012-09-20 9:14 Sergey Senozhatsky
2012-09-20 8:24 Igor Zhbanov
2012-09-19 8:26 Igor Zhbanov
2012-09-17 12:57 Igor Zhbanov
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=5059E1AF.3010000@linux.intel.com \
--to=powertop@lists.01.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.