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Overview of Operating Systems Introduction to Operating Systems: Module 0
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Course Introduction u Course Overview Objectives Topics Prerequisite knowledge u Course Material Texbooks eBooks Course homepage Helpful links Syllabus D2L Assignments, quizzes http://cs.uwm.edu/~cs537/
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Objectives u Understand the principles of OS design concentration on systems which are general-purpose multi-user single processor u See how OS design can impact program performance u Understand concurrency, and learn of the problems (such as race conditions) and tools used to solve them (such as semaphores) u Learn major features of the POSIX API as implemented by Solaris
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Core course topics u Computer architecture & OS foundations u Process management Concurrency Synchronization u Memory management u CPU scheduling u File systems
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Prerequisite knowledge u The C++ programming language u Assembly language for some machine u Some familiarity with UNIX u Basic graph theory u Understanding of basic probability Conditional probability Expected value
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What is an operating system? u Functions of an Operating System Control resource allocation Provide a user an environment for doing work u Traditional Design Approaches Layers, modules, microkernel, monolithic u Traditional Types of Operating Systems General Purpose Multiprocessor Distributed Real-time
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Functions of an OS: Resource Management u Time management - temporal properties CPU and disk transfer scheduling u Space management main and secondary storage allocation u Synchronization and deadlock handling IPC, race condition, coordination u Accounting and status information resource usage tracking
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Functions of an OS: User Environment u Transforms bare hardware machine into higher level abstractions u Execution environment process implementation The processor does not know about processes file manipulation Blocks and sectors file names and directories interrupt handling Serial device event button click I/O actions Delayed block write scheduled Save a file
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What can understanding the OS do for me? u The machine code executed while your program is running is determined by the C++ statements in your program, the compiler and libraries, and the operating system CPU C++ program C++ Compiler Library Operating System
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