Re: Maximum frequency of re-scheduling (minimum time quantum ) que stio n

[Peter Williams <pwil3058@bigpond.net.au>]

Povolotsky, Alexander wrote:
> Hi Peter,
> 
> 
>>By freeing "time slice"s from their involvement in active/expired 
>>priority array switching etc., the various single priority array 
>>schedulers (e.g. Con Kolivas's staircase scheduler and my SPA "pb" and 
>>"eb" schedulers) that are under development raise the possibility of 
>>allowing the time slice for SCHED_RR tasks to be different to that of 
>>ordinary tasks or even for it to be set separately for each SCHED_RR 
>>task.  Whether this is desirable or not is another question.
> 
> 
> IMHO (I am new in Linux),- if this functionality could be either optionally
> configured at compile time or be optionally invokable at run time (or
> combination of both) - why not to have it ? - this addition enhances choices
> of scheduling,
> which is good.
> 
> Is there a chance such functionality will make into Linux 2.6 as a patch (at
> some later time) ?

Not until the current scheduler is replaced with a single priority array 
scheduler.  However, if there's enough interest, I could add this 
functionality to the CPU scheduler evaluation patch so that people could 
experiment with it (BUT it would be at the bottom of my to do list).

> 
> By the way - what is the "mechanism" of decision making process (among Linux
> kernel developers) on such things ?

I'll leave this question to someone more knowledgeable.

Pete
-- 
Peter Williams                                   pwil3058@bigpond.net.au

"Learning, n. The kind of ignorance distinguishing the studious."
  -- Ambrose Bierce