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Understanding Operating System Processes: Resource Allocation, Accounting, and Security

Explore the functioning of processes in operating systems. Learn about resource allocation, protection, and security mechanisms. Dive into process states, components, and control blocks. Discover process scheduling, creation, and execution.

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Understanding Operating System Processes: Resource Allocation, Accounting, and Security

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  1. Processes: Basic Concepts CPE 261403 - Operating Systems

  2. OS Functions (2.1) Resource Allocation Accounting Protection & Security

  3. What happens when a program executes? Example.c void main() { int i=0; i = add (2,3); printf(“%d”,i); } int add(int p1, int p2) { return (p1 + p2); }

  4. Process States Figure 3.2

  5. Components of a Process Figure 3.1

  6. RAM instruction CPU Example.exe Example.exe Hard Drive

  7. What goes where in RAM? void main() { int i=0; i = add (2,3); printf(“%d”,i); } int add(int p1, int p2) { return (p1 + p2); }

  8. Process Control Blocks Figure 3.3

  9. OS RAM Prog1.exe Prog1.exe Prog2.exe Prog2.exe Hard Drive

  10. Context Switching Figure 3.4

  11. Process 1 Process 2 Execution

  12. Process vs Thread

  13. Process Queues Figure 3.5

  14. Process Scheduling Figure 3.6

  15. Process Creation Figure 3.8

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