process scheduling
Process Control Blocks(PCB)
Job 5 States
FINISHED
RUNNING
WAITING
READY
HOLD
Types of Scheduling
JOB SCHEDULING
Goal
keep most system components busy most of time
balance I/O interaction and computation
sequence jobs
functions
decides on job initiation criteria
places jobs in process queue
selects incoming job from queue
process sheduling based on certain criteria
determines execution steps
process scheduling responsibilities
lower-level scheduler
PROCESS SCHEDULING
function
recognizes job conclusion
determines which queues for job movement during execution
decides when to interrupt processing
determines which ob will get CPU resource
job initiation based on certain criteria
job scheduling responsibilities
first encounter for job/program
higher-level scheduler
