[RFC]runtime pm:what does the runtime_usage really mean?

[RFC]runtime pm:what does the runtime_usage really mean?

[ren zhen]

Hi all:
       The power management maillist says:
                 " runtime_usage: the runtime PM usage count of a device".
        What does 'runtime_usage' really mean? what situations should
we use it? And when increase it or decrease it?
         Anyone who know about that, please give me a detailed account
of 'runtime_usage', a actual example cannot be more better!
       I will appreciate any help.

--
Sincerely,
Ren Zhen

Re: [RFC]runtime pm:what does the runtime_usage really mean?

[ren zhen]

'runtime_usage' is an attribution of device power, which appears in
/sys/devices/.../power/ directory.

On Thu, Apr 18, 2013 at 4:18 PM, ren zhen <darwin.xupt@gmail.com> wrote:
> Hi all:
>        The power management maillist says:
>                  " runtime_usage: the runtime PM usage count of a device".
>         What does 'runtime_usage' really mean? what situations should
> we use it? And when increase it or decrease it?
>          Anyone who know about that, please give me a detailed account
> of 'runtime_usage', a actual example cannot be more better!
>        I will appreciate any help.
>
> --
> Sincerely,
> Ren Zhen



-- 
Sincerely,
Ren Zhen

Re: [RFC]runtime pm:what does the runtime_usage really mean?

[Alan Stern]

On Thu, 18 Apr 2013, ren zhen wrote:

> 'runtime_usage' is an attribution of device power, which appears in
> /sys/devices/.../power/ directory.
> 
> On Thu, Apr 18, 2013 at 4:18 PM, ren zhen <darwin.xupt@gmail.com> wrote:
> > Hi all:
> >        The power management maillist says:
> >                  " runtime_usage: the runtime PM usage count of a device".
> >         What does 'runtime_usage' really mean? what situations should
> > we use it? And when increase it or decrease it?
> >          Anyone who know about that, please give me a detailed account
> > of 'runtime_usage', a actual example cannot be more better!
> >        I will appreciate any help.

See Documentation/power/runtime_pm.txt.  That file calls it 
"usage_count" or "usage counter".

Alan Stern

Re: [RFC]runtime pm:what does the runtime_usage really mean?

[ren zhen]

'runtime_usage' is an attribution of device power, which appears in
/sys/devices/.../power/ directory.

On Thu, Apr 18, 2013 at 4:18 PM, ren zhen <darwin.xupt@gmail.com> wrote:
> Hi all:
>        The power management maillist says:
>                  " runtime_usage: the runtime PM usage count of a device".
>         What does 'runtime_usage' really mean? what situations should
> we use it? And when increase it or decrease it?
>          Anyone who know about that, please give me a detailed account
> of 'runtime_usage', a actual example cannot be more better!
>        I will appreciate any help.
>
> --
> Sincerely,
> Ren Zhen



--
Sincerely,
Ren Zhen

Re: [RFC]runtime pm:what does the runtime_usage really mean?

[ren zhen]

Addtionally, I cannot find any explanation of 'runtime_usage' in
Documention/ABI/ directory.

On Thu, Apr 18, 2013 at 4:24 PM, ren zhen <darwin.xupt@gmail.com> wrote:
> 'runtime_usage' is an attribution of device power, which appears in
> /sys/devices/.../power/ directory.
>
> On Thu, Apr 18, 2013 at 4:18 PM, ren zhen <darwin.xupt@gmail.com> wrote:
>> Hi all:
>>        The power management maillist says:
>>                  " runtime_usage: the runtime PM usage count of a device".
>>         What does 'runtime_usage' really mean? what situations should
>> we use it? And when increase it or decrease it?
>>          Anyone who know about that, please give me a detailed account
>> of 'runtime_usage', a actual example cannot be more better!
>>        I will appreciate any help.
>>
>> --
>> Sincerely,
>> Ren Zhen
>
>
>
> --
> Sincerely,
> Ren Zhen



--
Sincerely,
Ren Zhen