Hi Randy,
You can access the hardware specs from
http://www.intel.com/design/chipsets/datashts/313071.htm, which is the
datasheet for 5000P/V/Z MCH and contains API for thermal protection
mechanism in section 3.9.
I think this power saving mechanism has little impacts on VM
because it will be enabled only when system is idle and no other effects
other than reduced memory bandwidth will be visible to OS.
Randy Fishel <mailto:randy.fishel at sun.com> wrote:
> On Wed, 12 Mar 2008, Liu, Jiang wrote:
>
>> All,
>> I would like to propose a project to enable FB-DIMM idle power
>> saving on Intel 5000P/5000V/5000Z MCH chipsets.
>> Intel 5000 series MCH chipsets have a thermal protection
>> mechanism which can be used to reduce FB-DIMM power consumption when
>> system is idle. This power saving mechanism has been proven to be
>> very useful in real IDC. On the other hand, platforms based on Intel
>> 5000 series MCH will continue to ship until the end of 2009 plus 4-5
>> years' lifetime. So enabling FB-DIMM power saving feature can make
>> systems based on 5000 series MCH more power efficient and save money
>> for customers. Any thoughts or suggestions?
>>
>> Liu Jiang (Gerry)
>> Senior Software Engineer
>> OpenSolaris, OTC
>> Tel: (8610)82611515-1643
>> iNet: 8758-1643
>
>
> I'm for this!
>
> Are there specs for power/hardware API's? Any ideas on VM impacts?
>
>
> ---- Randy
