OPERATING SYSTEM STRUCTURES

1. Layered Approach

1.1. Advantage

1.1.1. Simplicity of construction and debugging

1.2. Disadvantages

1.2.1. The careful definition and interaction of the layers

1.2.2. Less efficient

2. Microkernel

2.1. Benefits

2.1.1. Extensibility

2.1.2. Flexibility

2.1.3. Reliability

2.1.4. Portability

3. Design Goals

3.1. User goals

3.2. System goals

4. OPERATING SYSTEM SERVICE

4.1. USER INTERFACE

4.2. PROGRAM EXECUTION

4.3. I/O OPERATION

4.4. FILE SYSTEM MANIPULATION

4.5. COMMUNICATION

4.6. ERROR DETECTION

5. System Calls

5.1. Process control

5.2. Device management

5.3. File management

5.4. Information maintenance

5.5. Communications

5.5.1. message passing

5.5.2. shared memory

5.6. Protection