Re: [RFP] LPC thermal track

[Eduardo Valentin <edubezval@gmail.com>]

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Hey Srinivas,

On Mon, Mar 30, 2015 at 12:11:17PM -0700, Srinivas Pandruvada wrote:
> On Fri, 2015-03-27 at 11:47 +0000, Punit Agrawal wrote: 
> > Hi Eduardo,
> > 
> > Thanks for proposing a thermal micro-conference. It would be good to 
> > discuss the direction things are heading with regards to thermal in linux.
> > 
> > On 27/03/15 00:02, Eduardo Valentin wrote:
> > > Hello all,
> > >
> > > I've created a proposal for a thermal microconference track on the LPC
> > > 2015 [1]. The basic idea is to get thermal developers together and
> > > discuss the thermal role within the Linux environment, from kernel and
> > > userspace perspective.
> > >
> > > A initial proposal for the topics to be discussed are:
> > > . Closed loop control governors
> > > . Sensor API
> > > . Thermal class: split of temperature sensor device and thermal driver
> > > . Improvements on OF-thermal
> > > . Devfreq vs. clock cooling
> > > . Power model based policies
> > > . User space tools
> > > . User space governors
> > >
> > > If you have interest, or if you have ideas on how to improve the
> > > framework, reply to this email and add it to the wiki.
> What about
> Some enhancement in thermal zone user space I/F for user space thermal
> controllers
> - Better support for virtual temperature sensors which depends on other
> sensors. 
> - Support for Linux IIO style scale and offset in thermal zone
> temperature calculation.
> - /dev interface for pushing thermal samples instead of raw read of
> temperature to improve performances and push sample instead of pull from
> user space.

Can you please add these topics to the wiki?

Would you be able to attend LPC and give a talk about your thoughts?

BR,

Eduardo Valentin

> 
> Thanks,
> Srinivas 
> > >
> > 
> > I'd like to propose -
> > 
> > . Co-ordination among cooling-devices in the system
> > 
> > In workloads that involve multiple devices such as camera+CPUs+image 
> > singal processor or camera+video encoding, etc. often there are 
> > dependencies across multiple devices' performance states to achieve 
> > minimum acceptable performance (24fps HD encode for example). When 
> > thermally constrained it would help to have some mechanisms to 
> > co-ordinate their performance control. The power allocator governor 
> > attempts to solve some of these problems but it would be good to have a 
> > wider discussion on enabling more scenarios.
> > 
> > 
> > > Add your name in the list of participants as well. Also, if you feel
> > > like giving a talk on the topic, let's add it to the topic list.
> > >
> > 
> > Done.
> > 
> > Cheers,
> > Punit
> > 
> > > Currently I am simple checking what would be the level of interest to
> > > have this topic as a LPC microconference.
> > >
> > > BR,
> > >
> > > Eduardo Valentin
> > >
> > >
> > > [1] - http://wiki.linuxplumbersconf.org/2015:thermal
> > >
> > 
> 
> 

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