CIS 371: Computer Organization & Design Unit 10: Static & Dynamic Scheduling Slides originally developed by , , and at University of Pennsylvania Copyright By PowCoder代写 加微信 powcoder CIS 371: Comp. Org & Design | Prof. | Scheduling 1 This Unit: Static & Dynamic Scheduling System software • Code scheduling • To reduce pipeline stalls […]
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Parallel Programming N-Body Simulation in CUDA Slides based on Martin Burtscher’s tutorial https://userweb.cs.txstate.edu/~burtscher/research/ECL-BH/ Outline • Review: GPU programming • N-body example • Porting and tuning NASA/JPL-Caltech/SSC 2 CUDA Programming Model • Non-graphics programming – Uses GPU as massively parallel co-processor CPU PCI-Express GPU bus • SIMT(single-instruction multiple-threads) model – Thousands of threads neededforfullefficiency • C/C++
Student Number: Family Name: Given Names: Signature: THE UNIVERSITY OF NEW SOUTH WALES Final Examination Sample COMP3231/COMP9201/COMP3891/COMP9283 Operating Systems • Time allowed: 2 hours • Reading time: 10 minutes • Total number of questions: 5; Total number of pages: 7 • Answer all questions. The questions are not of equal value • Total marks available
UNIX File Management (continued) 1 OS storage stack (recap) Application FD table OF table VFS FS Buffer cache Disk scheduler Device driver 2 Virtual File System (VFS) Application FD table OF table VFS FS Buffer cache Disk scheduler Device driver 3 Older Systems only had a single file system •They had file system specific open,
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Welcome to OS @ UNSW COMP3231/9201/3891/9283 (Extended) Operating Systems Dr. Kevin Elphinstone System Software Structure Compiled C Code System Libraries System Calls Operating System Hardware Python Code Python Libraries Python Compiler and Interpreter System Libraries System Calls Operating System Hardware Major OS Topics Processes and Threads Memory and Virtual Memory Management Concurrency and Deadlock Operating
Virtual Memory II 1 Learning Outcomes • An understanding of TLB refill: – in general, – and as implemented on the R3000 • An understanding of demand-paged virtual memory in depth, including: – Locality and working sets – Page replacement algorithms – Thrashing 2 TLB Recap • Fast associative cache of page table entries –
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Virtual Memory 1 Learning Outcomes • An understanding of page-based virtual memory in depth. – Including the R3000’s support for virtual memory. 2 Memory Management Unit (or TLB) The position and function of the MMU 3 Virtual Address 15 14 13 12 11 10 9 8 Page-based VM • PhysicalMemory – Divided into equal-sized frames
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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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Chapter 6 Deadlocks 6.1. Resources 6.2. Introduction to deadlocks 6.3. The ostrich algorithm 6.6. Deadlock prevention 6.4. Deadlock detection and recovery 6.5. Deadlock avoidance 6.7. Other issues 1 Learning Outcomes • Understand what deadlock is and how it can occur when giving mutually exclusive access to multiple resources. • Understand several approaches to mitigating the
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Case study: ext3 FS A brief intro to Journaling The ext3 file system • Design goals – Add journaling capability to the ext2 FS – Backward and forward compatibility with ext2 • Existing ext2 partitions can be mounted as ext3 – Leverage the proven ext2 performance – Reuse most of the ext2 code base –
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