[haiku-development] Re: The new locking primitives and boosting -- I need some guidance here :)

Hi André,

André Braga wrote:
> Fortunately the latest design I did (the one described in the blog posts 
> has a flaw when threads enter and leave the scheduler which I didn't 
> manage to solve, so I redesigned it yet once more) behaves quite nicely 
> in this regard: a thread that's constantly ready will always run with a 
> period equal to
> thread_priority/(sum_of_all_ready_threads_priorities * timeshare). IOW, 
> it's a pretty fair scheduler.
> 
> > As for whether or not this is desirable for R1 - I certainly think it 
> > is a must have. I don't know the involved code very much, but it looks 
> > like the scheduler should be a rather contained piece of code, so it's 
> > not like we are talking about changing lots of code with unforseen 
> > results. So please, by all means, work on it and experiment! :-)
> 
> I'm not really worried with the scheduler code per se anymore, as it's 
> mostly done now. You'll be hearing from me Real Soon Now(tm) ;) It's the 
> boosting code that I'm eyeing ATM, and load balancing code is next (and 
> is a subject for another short novel of a message :D), but I agree that 
> Haiku would probably benefit a lot from the new scheduler without any 
> further tweaking re priority boosting etc.

This is great news. Maybe you have sent patches to Axel... but I for one 
would love to see your work, or better yet, your progress, since then I may 
have a chance to follow it and understand it better than if a bigger bulk 
of code appears all at once. You may benefit from the input of others, 
while you work. So why don't you attach code to a ticket or send it to this 
list?

Best regards,
-Stephan

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