Re: How does 2.6 SMP scheduler initially assign a thread to a runqueue?

[Steven Rostedt]

On Wed, 2005-06-08 at 12:03 -0700, Siddha, Suresh B wrote:

> > > By the way, in an SMT/hyperthreading processor, does the latest kernel
> > > version assign one run queue per physical CPU, or per virtual 
> > > processor?
> > > 
> > 
> > one run-queue per physical CPU
> 
> No. Each logical processor has its own runqueue.

I think it is also worth mentioning that the sched domains are used to
help keep processes on the same physical CPU. Little cost associated to
moving a process from one logical CPU to a sibling, where as there is a
big cost in moving it to another physical CPU.

-- Steve


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