Does POSIX standard say EXPLICIT or IMPLICIT SCHED

[Ralf Corsepius]

Am Mit, 2002-12-04 um 18.18 schrieb Joel Sherrill:
> Till Straumann wrote:
> > 
> > I guess I was naive when I first wrote the benchmark code - I figured
> > POSIX was a standard
> > and hence the defaults would be standardized.
> 
> HAHAHAHA!!!  :)  The reason for this perception is that in general
> things are portable. 

<*fg*> pthread_attr_setschedpolicy </*fg*>

SUSV3 says "SCHED_OTHER, SCHED_RR and SCHED_FIFO shall ..."

SCHED_OTHER is the default on most systems, but .. 
* what is SCHED_OTHER? 
* Some "POSIX-compliant" OSes do not provide SCHED_RR or SCHED_FIFO
* Some schedulers require special permission (eg. root) or system
settings on some systems.
...

Ralf