Friday, July 26, 2013

Thermal management

I have been working  as intern for thermal management project , I like to share what i have been learned Thermal management

The generic thermal management uses a concept of cooling states. 

The intent of a cooling state is to define thermal modes for supporting devices. 

The higher the cooling state, the lower the device/platform temperature would be. 

This can be used for both passive and active cooling devices.

  • Passive cooling -  does not use a fan or other means of forced-air cooling.  Relies on      natural convection cooling.
  •  Active cooling -   uses a fan directly mounted onto the heat sink for forced-air cooling.   

sysfs driver will redirect all the control requests to the appropriate cooling device driver when the user application sets anew cooling new state. 

It is up to the cooling device driver to  implement the actual cooling control.

Thermal management in user space would imply that all the policy decisions will be taken from user space and the kernel’s job would be only to facilitate those decisions.

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