PPT-Chapter 9: Virtual Memory

Chapter 9 Virtual Memory Working set Thrashing MemoryMapped Files Allocating Kernel Memory Other Considerations Objectives To discuss the principle of the workingset model Thrashing If a process does not have enough pages the pagefault rate is very high. 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 2. Goals for Today. Virtual . memory. Mechanism. How does it work?. Policy. What . to replace. ?. How much to fetch?. 3. What is virtual memory?. Each process has illusion of large address space. 2. 32. U . Wisc. and HP Labs. ISCA’13. Architecture Reading Club Summer'13. 1. Key points. Big memory workloads . Memcached. , databases, graph analysis . Analysis shows. TLB misses can account for . upto. Use main memory as a “cache” for secondary (disk) storage. Managed jointly by CPU hardware and the operating system (OS). Programs share main memory. Each gets a private virtual address space holding its frequently used code and data. Apr 25, 2017. 1. Memory (Programmer. ’. s View) . 2. Hmmm, How Does This Work?! . Process 1. Process 2. Process n. Solution: Virtual Memory (today and next lecture). 3. Today . Virtual Memory: Concepts . 2017. Instructor:. . Ruth Anderson. Teaching Assistants:. Dylan Johnson. Kevin Bi. Linxing. Preston Jiang. Cody . Ohlsen. Yufang. Sun. Joshua Curtis. Administrivia. Midterms Graded. If you did not receive an email from . Virtual World pros & cons Outline Virtual Reality Virtual World Second Life Pros & Cons How Second life Affects Real Life Are we ready to live in a Virtual World? Virtual Reality Virtual reality (VR) is a powerful technique that uses computer representations to transform people's sense of presence, so that they feel themselves to be in a virtual environment rather their current one. CS 3410, Spring 2012. Computer Science. Cornell University. P & H Chapter 5.4 . Goals for Today. Virtual Memory. Address Translation. Pages, page tables, and memory . mgmt. unit. Paging. Role of Operating System. 15-213: Introduction to Computer Systems . 16. th. . Lecture, Oct. . 22. , 2013. Instructors:. . Randy Bryant, Dave . O’Hallaron. , and Greg . Kesden. Today . Address spaces. VM as a tool for caching. CSE351 Winter 2013. Roadmap. 2. car *c = malloc(sizeof(car));. c->miles = 100;. c->gals = 17;. float mpg = get_mpg(c);. free(c);. Car c = new Car();. c.setMiles(100);. c.setGals(17);. float mpg =. Perigon Live, a leading provider of digital event software, announces the addition of the Green Room to its feature-rich product. Visit: https://perigonlive.com Hosting an event can be a wonderful opportunity to build relationships with potential clients, boost your brand’s relevance and reputation, and even have a little fun with showing the world who your brand really is. Visit: https://perigonlive.com Instructor:. . Justin Hsia. Teaching Assistants:. Lucas Wotton. Michael Zhang. Parker . DeWilde. Ryan Wong. Sam . Gehman. Sam Wolfson. Savanna Yee. Vinny . Palaniappan. https. ://xkcd.com/1495/. Administrivia. 17. th. Lecture, . November 1. , 2022. Instructors:. . Dave Andersen (15-213). Zack Weinberg (15-213). Brian Railing (15-513). David Varodayan (14-513). Review: Virtual Addressing. Each process has its own .