On Wed, Aug 29, 2018 at 11:39:12AM +0200, Daniel Lezcano wrote:

On 18/07/2018 09:49, Amit Kucheria wrote:

quoted

One thermal zone per cpu is defined

The thermal zones are very close, especially when the CPUs belong to the
same 'cluster'. Very likely the temperature will propagate from one core
to another core, so when one core reaches the trip0, there is good
chance the other cores will be close and cross the trip0 threshold too.

Having multiple thermal zones, one per CPU, may trigger an interrupts
storm with the passive polling timer delay.

Does this board have a cooling device per CPU also ?

The cpufreq driver is still under development:
https://lore.kernel.org/patchwork/patch/966833/ . It currently doesn't
register cooling devices, but since CPUs from a 'cluster' use the same
cpufreq policy I think there will be one cooling device per 'cluster'.