11/05/2020 SampleAnswers2 – COMP3231/COMP9201/COMP3891/COMP9283 Sample Answers for New Sample Exam Q1 1. False, the role of the operating system is to abstract away low level details 2. True (If the processor features a privileged mode, then the operation system will use it.) 3. False, the kernel has a separate stack 4. False, the operating system […]
Concurrency and Synchronisation 1 Learning Outcomes • Understand concurrency is an issue in operating systems and multithreaded applications • Know the concept of a critical region. • Understand how mutual exclusion of critical regions can be used to solve concurrency issues • Including how mutual exclusion can be implemented correctly and efficiently. • Be able
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Assignment 2 tips 1 The Basic ASST2 Spec • Implement open(), read(), write(), lseek(), close(), and dup2() • Not assuming a single process • Assume fork() exists • User-level exists • asst2 • C libraries • Anexistingframeworkandcodefor: • system call dispatching, • VFS • Emufs • drivers 2 Overview • Overall structure • User-level •
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Assignment 3 Intro 1 Assignment 3 – Page table and ‘region’ support • Virtual memory for applications • Only the memory resident part, paging to disk is an advanced part. 2 Virtual Address Space Stack Heap (sbrk()) Data Text (Code) Theoretical Typical Address Space Layout • Stack region is at top, and can grow down
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Processes and Threads Implementation 1 Learning Outcomes • A basic understanding of the MIPS R3000 assembly and compiler generated code. • An understanding of the typical implementation strategies of processes and threads • Including an appreciation of the trade-offs between the implementation approaches • Kernel-threads versus user-level threads • A detailed understanding of “context switching”
I/O Management Intro Chapter 5 – 5.3 1 Learning Outcomes • A high-level understanding of the properties of a variety of I/O devices. • An understanding of methods of interacting with I/O devices. 2 3 I/O Devices • There exists a large variety of I/O devices: – Many of them with different properties – They
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CUDA Tutorial MSBD5009 Assignment3 Outline • CUDA Environment • CUDA programming basics • Assignment 3 CUDA Environment • CUDA environment is enabled already on your Azure instance. • Check your CUDA environment: • Use nvcc –version • If you cannot found nvcc command, please send email to TAs. Typical CUDA programming model Memory Allocation •
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MSBD5009 Parallel Programming Assignment #3: CUDA Programming Due on 12 May 2020 at 11:59pm Instructions • This assignment counts for 20 points. • This is an individual assignment. You can discuss with others and search online resources, but your submission should be your own code. • Fill your name, student ID and email in the
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Memory Management 1 Learning Outcomes • Appreciate the need for memory management in operating systems, understand the limits of fixed memory allocation schemes. • Understand fragmentation in dynamic memory allocation, and understand basic dynamic allocation approaches. • Understand how program memory addresses relate to physical memory addresses, memory management in base- limit machines, and swapping
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Student Number: Family Name: Given Names: Signature: THE UNIVERSITY OF NEW SOUTH WALES Final Examination SAMPLE COMP3231/COMP9201 Operating Systems • Time allowed: 2 hours • Reading time: 10 minutes • Total number of questions: 6 • Answer all questions • The questions are not of equal value • This paper may not be retained by
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