PPT-Chapter 8: Main Memory Chapter 8: Memory Management

Background Swapping Contiguous Memory Allocation Segmentation Paging Structure of the Page Table Example The Intel 32 and 64bit Architectures Example ARM Architecture Objectives To provide a detailed description of various ways of organizing memory hardware. g a core dump Semiconductors are almost universal today Memory Cells Properties Exhibit two stable or semi stable states representing 1 and 0 Capable of being written to at least once to set state Capable of being read to sense the state Memory Cell Avg Access Time 2 Tokens Number of Controllers Average Access Time clock cyles brPage 16br Number of Tokens vs Avg Access Time 9 Controllers Number of Tokens Average Access Time clock cycles brPage 17br brPage 18br brPage 1br Chapter 08 The Memory System Memory Interleaving brPage 2br Objective brPage 3br Interleaving Pipeline brPage 4br Improving Performance by Banking and Interleavin Operating Systems. 2. Chapter Goals. Describe the two main . responsibilities . of an operating system. Define . memory . and . process . management. Explain how . timesharing . creates the virtual machine illusion. Cache Memory. Computer Organization and Architecture. William Stallings . 8th Edition. Memory subsystem. Typical computer system is equipped with a hierarchy of memory subsystems, some internal to the system (directly accessible by the processor) and some external (accessible by the processor via an I/O module).. : . A . group of . related . mental processes that are involved in acquiring, storing, and retrieving information. What Is Memory?. M. emory . involves . three fundamental processes.. Encoding. : . T. BYU CS 345. Memory Management. 2. CS 345. Stalling’s Chapter. #. Project. 1: Computer System Overview. 2: Operating System Overview. 4. P1:. Shell. 3: Process Description and Control. 4: Threads. 4. Von Neumann architecture:. Program and data is in the same memory (code . is. data). Harvard architecture:. Physically separate memory for code and data. Program must be brought (from disk) into memory and placed within a process for it to be run. Lecture for CPSC 5155. Edward Bosworth, Ph.D.. Computer Science Department. Columbus State University. The Simple View of Memory. The simplest view of memory is . that presented . at the ISA (Instruction Set Architecture) level. At this level, memory is a . Part 2: Paging Algorithms and. Implementation Issues. Chapter 4. 2. CS 1550, cs.pitt.edu (originaly modified by Ethan L. Miller and Scott A. Brandt). Page replacement algorithms: summary. Algorithm. Chapter 6: Memory Memory is our brain’s system for filing away new knowledge and retrieving previously learned information While memory is an essential human attribute, it is not always accurate Learning How Does Your Memory Work? Video Questions. 1. What part of your brain springs to action when your memory “network” is activated? . 2. Describe these 3 major functions of memory as described in the video: . Background. Contiguous Memory Allocation. Paging. Structure of the Page Table. Swapping. Example: The Intel 32 and 64-bit Architectures. Example: ARMv8 Architecture. Objectives. To provide a detailed description of various ways of organizing memory hardware. Master the concepts of hierarchical memory organization.. Understand how each level of memory contributes to system performance, and how the performance is measured.. Master the concepts behind cache memory, virtual memory, memory segmentation, paging and address translation..