[Info-vax] nice for VMS

[Bob Koehler]

In article <grk7v2$sgt$1 at news.albasani.net>, "Fred Zwarts" <F.Zwarts at KVI.nl> writes:
> 
> Are priority 0 processes still competing with the NULL process,
> or do I carry to much of the VMS history with me?
> (I know the NULL process is no longer visible in newer VMS versions.)

   There hasn't been any real NULL process since the days when SHOW
   SYSTEM stopped displaying it, but if you poll all the processes using
   $GETJPI you will see a NULL process because the PCB is kept around.

   That was done because cloning the null PCB is faster than creating
   one from scratch when creating a process.

   The scheduler simply enters the idle loop itself when there is no
   other work to be done.  I think it will not do this if a priority
   0 process is COM or CUR.