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Operating System support

Operating System support. Objectives . Middleware is supported by O.S. facilities. O.S. facilities: encapsulation, protection, invocation, communication, ……. Role of system kernel. Advantages and disa dvantages of splitting func . –domains. Splitting – kernel and user level code

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Operating System support

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  1. Operating System support

  2. Objectives • Middleware is supported by O.S. facilities. • O.S. facilities: encapsulation, protection, invocation, communication, ……. • Role of system kernel. • Advantages and disadvantages of splitting func. –domains. • Splitting – kernel and user level code • Trade-off…………………

  3. Introduction • Resource sharing. • Middleware. • Unix, Windows NT. • Remote resource • Network operation system. • Multiple system image. • Single system image. • Middleware and Network operation system.

  4. Figure 6.1 - System layers

  5. Figure 6.2 Core OS functionality

  6. Figure 6.3 Address space

  7. Creation a new process and threads (self study)

  8. Communication and invocation (report) Figure 6.11Invocations between address spaces

  9. Figure 6.12 RPC delay against parameter size

  10. Figure 6.13 A lightweight remote procedure call

  11. Figure 6.14Times for serialized and concurrent invocations

  12. O.S. architecture • Monolithic – UNIX: most operating system function, take up code and data, non modular way, adopt……. • Microkernel - Basic abstraction, address space, local inter-process communication, binary emulation…….

  13. Figure 6.15Monolithic kernel and microkernel

  14. Figure 6.16The role of the microkernel

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