On 4/22/2013 7:23 PM, Alex Shi wrote:
Thanks you, Preeti and Vincent to talk the power aware scheduler for details! believe this open discussion is helpful to conduct a a more comprehensive solution. :)
Hi Preeti,
I have had a look at Alex patches but i have some concerns with his patches -There no notion of power domain which is quite important when we speak about power saving IMHO. Packing tasks has got an interest if the idle CPUs can reach a useful low power state independently from busy CPUs. Architectures have different low power state capabilities which must be taken into account. In addition, you can have system which have CPUs with better power efficiency and this kind of system are not taken into account.
I agree with you on this point. and like what's you done to add new flag in sched domain.
For x86 we should not be setting such flag then; we don't have a way for some cpu packages to go to an extra deep power state if they're completely idle. (this afaik is true for both Intel and AMD)