Strawman proposal: making libthr default thread implementation?

[David Xu]

On Wednesday 05 July 2006 07:06, David Xu wrote:

> Cann't solaris's user usage scheduler will solve the problem ? if I
> recall it correctly, the decay factor in 4bsd scheduler can be changed
> dynamically for a thread, the decay factor can be stored in thread
> structure, and timeslice can be dynamically changed, also can be in thread
> structure, unlike current implementation, timeslice is fixed,  this may
> make fair scheduling  possible without ksegrp.
>
> Also will the roundrobin callout preempt a thread ?  if that's true, then
> when every timeslice tick, a thread exhausted its timeslice is put at head
> of runqueue, isn't it a bug ? the callout is somewhat random for a thread,
> might not be a problem...

OK, I just digged out the paper in my disks,  here is the reference:
http://people.freebsd.org/~davidxu/doc/solaris2.pdf

[the address thread at freebsd.org is removed]

I think we really should do more work in kernel scheduler, and remove
ksegrp.

David Xu