Null Process

[shalecraig]

Null Process
This process runs as the lowest priority process (level 4) in the RTX.. The Null process is the only process assigned to  level  4.  Level  4  is  basically  a  “hidden”  priority  level  reserved  for  the  Null  process.  This  preserves  the  4  levels  of   user priorities (levels 0, .. , 3). Process id 0 is reserved for the null process. Initially, the following pseudo code can be used to design your null process:

loop forever
    release the processor
end loop

Once you have preemption  working,  then  the  “release  the  processor”  line  could  be  removed  from  the  infinite  loop.

[shalecraig]

Waiting on preemption on piazza.

[shalecraig]

Closing as we have done this.