Re: [Powertop] Powertop doesn't detects sleeping ARM cores

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