Various CPU Scheduling Terminologies

Arrival Time

• The time when a process enters the ready queue.
• Measured from the start of system execution.

Burst Time (BT)

• The total time a process needs the CPU for execution.
• Also called execution time.

Completion Time

• The exact time at which the process finishes its execution.

Turnaround Time (TAT

• Total time taken from process arrival to its completion.

Waiting Time (WT)

• Time a process waits in the ready queue (not executing).

Response Time

• Time between process submission and first CPU response.
• Important in interactive systems.

Context Switching

• The process of saving the state of one process and loading another.
• Enables multitasking.

Queue

• A queue that stores all processes ready and waiting for CPU time.

Throughput

• Number of processes completed per unit time.
• Higher throughput = better performance.

CPU Utilization

• Percentage of time CPU is actively working.
• Aim is to keep utilization as high as possible.