Relationship between power and parallelism.

[abhiverma812]

Hello experts,

I was curious to know how power (dynamic and static) are related to number of cores (parallelism) in CPU design.
I read somewhere that dynamic power favors multi-processing while static power favors uni-processing. However, I was not able to understand it.
Can someone throw light on this aspect.

Best regards,
Abhishek

 

[rca]

The dynamic power is dependent of the frequency, then if you could parallelize your logic you could reduce the frequency.

 

[soloktanjung]

My opinion,

Multiprocessor architecture - save dynamic power, by distributing the computation to several processing cores which is running at lower frequency (than the initial single core). For static power, it using the same library as is the initial single core, it could increase it because we add more processor.

single processor architecture - save static power because you only have single processor. while for the dynamic power, it is difficult to control/manage because we have to deal with the internal (microarchitecture) of the processor (not much can be done when compared with multiprocessor architecture).

Perhaps other members can provide more arguments.

Thanks.