fwts cpu + thermal checking test?

[Alex Hung]

Hi,

Thermal design is often a little more complex. A sample of thermal 
management is attached for references. Hope it will help us brainstorm.

PS. The upper table is for AC mode and bottom is for batty mode.


On 06/01/2012 05:26 PM, Colin Ian King wrote:
> On 01/06/12 10:07, Alex Hung wrote:
>> On 05/31/2012 11:51 PM, Colin Ian King wrote:
>>> Hi folks,
>>>
>>> Since fan control is under firmware control on a range of x86 hardware
>>> and passive thermal controls such as CPU scaling can be BIOS controlled
>>> I suspect we should look into adding thermal overrun tests to fwts.
>>>
>>> I'd like to add that to the fwts quantal blueprint, I know it's late in
>>> the day, but I think it is a worthy test to add to fwts. Any takers?
>>>
>>> Colin
>>>
>>
>> I think it's a good idea, but implementation may be challenging.
>>
>> From my understanding, not all fans are controllable by kernel because
>> fan can be controlled by EC solely. This can be probably checked by acpi
>> fan devices with id PNP0C0B.
>
> Very true, but some machines, like thinkpads we have some interfaces
> exposed to us to see if fans are working and we can check that against
> the CPU temperature as we load the CPU + GPU.

Looks good. So we can also tests thinkpad without acpi devices.

>>
>> Are you thinking of making it a batch test or an interactive tests?
>
> batch test if possible.
>

When I was testing thermal trip points, it was usually done manually. It 
would be interesting to see how much we can automate the process.

>>
>> Are we expecting to trigger critical thermal temperature so the system
>> would shutdown or hibernate?
>
> I'd like to be able to see if we can force it to go critical which I
> think is a failure case - a machine should not burn so hot it shuts down.

That's usually true. We had to stuck the fan so it would become hot 
enough to shutdown in a sealed chamber.

Do you have any scope of the test in mind yet? I can list some scenario 
and propose some tests next week.

>
> Colin
>>
>> Cheers,
>> Alex Hung
>>
>
>

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