Re: [9fans] [GSOC] plan9 kernel scheduler

[Yoann Padioleau <pad@fb.com>]

if you look in sys/src/9/port
and grep for functions like

sched()
schedinit()
runproc()
updatecpu()
repriotirize()

you'll get the logic of the scheduling algorithm. It's mostly
priority queue fair robin I think, with a few hooks to prefer reschedule
on the same CPU.

Context switching is done with the
gotolabel()
setlabel()
mmuswtich()
taskswitch()


On Jun 21, 2014, at 12:30 PM, yan cui <ccuiyyan@gmail.com> wrote:

> Hi all,
> 
>     On SMP or multicore systems, what algorithm(s) does Plan 9 use to schedule(context switching and load balancing) different tasks (process or thread) and where is it implemented? I searched some plan9 documents, but cannot find some about this topic. Any recommendations?    
> 
> 
> Thanks, Yan
> 
> -- 
> Think big; Dream impossible; Make it happen.