Questions on the scheduler

Oliver Herold oliver at akephalos.de
Sat Sep 29 09:31:20 PDT 2007


Are there any numbers or technical papers? Just out of curiosity.

Cheers, Oliver

On Sat, Sep 29, 2007 at 06:10:50PM +0200, Kris Kennaway wrote:
> RW wrote:
> 
>> The FreeBSD response was to make the kernel more SMP friendly with
>> finer-grained locking, and to bring-in the ULE scheduler. Dragonfly BSD
>> was a fork off 4.x by people who thought a more radical kernel rewrite
>> was needed. Their kernel avoids a lot of the locking problems by using
>> message queues.
> 
> Just to clarify, that was the theory and intention behind Dragonfly, but in 
> practise they have yet to achieve it after 4 years and any benefits of 
> their ideas remain unproven.  Basically they have achieved no performance 
> gains on SMP and have effectively abandoned working on it.
> 
> Kris
> _______________________________________________
> freebsd-questions at freebsd.org mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-questions
> To unsubscribe, send any mail to 
> "freebsd-questions-unsubscribe at freebsd.org"

-- 
Why did the Lord give us so much quickness of
movement unless it was to avoid responsibility with?


More information about the freebsd-questions mailing list