Virtual Memory, Demand Paging, Intro Page Replacement 1 Reading Dinosaur: Chapter 8, 9 Comet: Ch 21 22 2 Virtual Memory 3 Virtual Memory Definition: Virtual memory permits a process to run with only some of its virtual address space loaded into physical memory Key idea: Virtual address space translated to either […]
Multi-Level Paging, Inverted Page Table, TLB 1 Reading assignment Dinosaur Chapter 8 Comet Chapters 16, 17, 18 Midterm: 3/7 8pm-10pm EE170 2 12 [lec 13] Summary: Evolution of Memory Management (so far) Scheme Simple uniprogramming Simple multiprogramming Base & Bound Multiple segments How 1 segment loaded to starting address 0 1 segment
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Space Allocation, Virtual Memory 1 Today’s topics Kernel memory Space allocation Virtual memory 2 12 What about the kernel itself? bound virtual address > + base physical address What happens when OS is running? OS runs with relocation turned off (a bit in processor status word (PSW) controls relocation) How
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Sharing Main Memory, Segmentation, Simple Paging 1 Reading assignment Dinosaur Chapter 8 Comet Chapter 13, 15, 16 2 12 Connecting the dots main.o math.o linker main.c math.c compiler a.out memory management loader Load a.out to mem Manage mem for proc Instruction arch execution 3 The big picture A program needs address space
CSE101: Design and Analysis of Algorithms (CSE, UCSD, Winter-2020) Take-home Final • The points that you obtain will depend on the running time of your algorithm. For example, a student who gives a linear-time algorithm will receive more points than a student who gives an algorithm with quadratic running time for a given problem. We
CSE101: Design and Analysis of Algorithms (CSE, UCSD, Winter-2020) Take-home Final • The points that you obtain will depend on the running time of your algorithm. For example, a student who gives a linear-time algorithm will receive more points than a student who gives an algorithm with quadratic running time for a given problem. We
Overview Next assignment is worth 35% of the unit grade (it WILL contribute to your unit mark) It is a fairly complex piece of work… So worth spending some time getting to know ! 02/30 Overview The purpose of this assignment is to build… A general-purpose socket-server game-engine (for text adventure games) Sound familiar ?
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COMP 1130 – Lambda Calculus based on slides by Jeff Foster, U Maryland Motivation • Commonly-used programming languages are large and complex ■ ANSI C99 standard: 538 pages ■ ANSI C++ standard: 714 pages ■ Java language specification 2.0: 505 pages • Not good vehicles for understanding language features or explaining program analysis COMP 1130
COMP 1130 – Lambda Calculus based on slides by Jeff Foster, U Maryland Motivation • Commonly-used programming languages are large and complex ■ ANSI C99 standard: 538 pages ■ ANSI C++ standard: 714 pages ■ Java language specification 2.0: 505 pages • Not good vehicles for understanding language features or explaining program analysis COMP 1130
COSI 131a: Spring 2020 Programming Assignment 3 Due date is Wednesday, March 18th Overview Your task is to implement a simulation of tunnels and vehicles using Java Threads. There will be few tunnels, but many vehicles. Vehicle types can be cars or sleds. There will be several constraints on how many vehicles of each type