Re: [PATCH] Avoid moving tasks when a schedule can be made.

[Ingo Molnar]

* Ingo Molnar <mingo@xxxxxxx> wrote:

> i think the right approach would be to split up this work into smaller 
> chunks. Or rather, lets first see how this can happen: why is 
> can_migrate() false for so many tasks? Are they all cpu-hot? If yes, 
> shouldnt we simply skip only up to a limit of tasks in this case - 
> it's not like we want to spend 1.5 msecs searching for a cache-cold 
> task which might give us a 50 usecs advantage over cache-hot tasks ...

the only legimate case where we have to skip alot of tasks is the case 
when there are alot of CPU-bound (->cpus_alowed) tasks in the runqueue.  
In that case the scheduler really has to skip that task. But that is not 
an issue in your workload.

	Ingo
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