lecture03-chapter02 - Operating Systems Operating Lecture...

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Operating Systems Operating Systems Lecture 03: Lecture 03: Operating System Overview Operating System Overview Anda Iamnitchi [email protected] 1
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Today Today Announcements: Proposal: change in TAs schedule Piazza Slides posted before class on course page: http://www.csee.usf.edu/~anda/cop4600/ Operating Systems Overview: Definitions (as many variants as textbooks…) Historical perspective Solution today’s “jeopardy” Grade yourself and hand it to me 2
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Operating Systems: Internals and Design Internals and Design Principles Principles Operating systems are those programs that interface the machine with the applications programs. The main function of these systems is to dynamically allocate the shared system resources to the executing programs. As such, research in this area is clearly concerned with the management and scheduling of memory, processes, and other devices. But the interface with adjacent levels continues to shift with time. Functions that were originally part of the operating system have migrated to the hardware. On the other side, programmed functions extraneous to the problems being solved by the application programs are included in the operating system. WHAT CAN BE AUTOMATED?: THE COMPUTER SCIENCE AND ENGINEERING RESEARCH STUDY, MIT Press, 1980 3
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Operating System Operating System An interface between user applications and hardware A service provider A program that manages computer resources 4
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The Operating System as a The Operating System as a User/Computer Interface User/Computer Interface 5
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Key Interfaces Key Interfaces Instruction set architecture (ISA) Application binary interface (ABI) Application programming interface (API) 6
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