http://www.read.cs.ucla.edu/111/ 2013-05-21T10:02:20-07:00 http://www.read.cs.ucla.edu/111/ http://www.read.cs.ucla.edu/111/lib/images/favicon.ico text/html 2011-03-28T14:25:33-07:00 kohler http://www.read.cs.ucla.edu/111/schedule?rev=1301347533&do=diff Schedule Week Date Topic Assignments Readings Week 1 M 1/3 Course introduction Scribe notes Lab 1a §1 W 1/5 Multitasking & process isolation Scribe notes: Chen, Simpkins, Valdes • Greene, Kushnick, Szeto §2.1, §5.1, §5.3.3-4, §5.7 Week 2 M 1/10 Process isolation II Scribe notes: Baldovino, Pao, Vismonte • Deutsch, Wiley Lab 1a "due" W 1/12 I/O abstractions & process interface Scribe notes: Garfinkel, Shwert, Stothard • Chowdhury, Molitor… text/html 2011-03-17T02:41:42-07:00 suppaluru http://www.read.cs.ucla.edu/111/notes/lec17b?rev=1300354902&do=diff By Samir Uppaluru, Jonathan McCue, and Wenjun Cai Distributed Systems II Operating Systems and the Network How do Operating Systems interact with network hardware? The OS writes out to a network card using a socket, which is a special type of a file descriptor, seen in the figure below. But what about the details of the implementation? A good place to start would be by examining how Operating Systems communicate with I/O devices we've already learned about, such as disks. From there, we can … text/html 2011-03-16T17:54:48-07:00 alanq http://www.read.cs.ucla.edu/111/notes/lec15?rev=1300323288&do=diff Buffer Cache and Virtual Memory Buffer cache is the primary cache for File System data. It is used to store things such as dallying and prefetch data. In order to do its job, the buffer cache needs: * File system data * Location of the data on the disk: Map cache memory to a disk location. (The cache is useless if it does not keep exact track of what data it is caching). * A mapping of file locations to pages: This requires the use of the fmap function. text/html 2011-03-16T17:54:03-07:00 ericlongphung http://www.read.cs.ucla.edu/111/notes/lec9?rev=1300323243&do=diff by Angelina Huang, Steven Nguyen, and Eric Phung Average: 58% Standard Deviation: 12% One important point that the midterm was meant to reinforce is system calls are sequentially consistent * If 2 processes/threads execute a series of system calls they will be interleaved * waitpid() returns a successful value at most once to a process waiting on a process p * property of an ATOMIC operation text/html 2011-03-16T14:32:59-07:00 kohler http://www.read.cs.ucla.edu/111/cs111?rev=1300311179&do=diff Lectures MW 10-11:50am, Boelter 5249 Lab sections Lab 1A: F 10-11:50am, Boelter 2760 (may change) Instructor Eddie Kohler, Boelter 4531C Office hours T 12:30-1:30pm, W 12:30-1:30pm, or by appointment, or whenever I'm in my office and available TAs Vahab Pournaghshband (vahab at cs dot ucla dot edu), office hours T 10am-12pm, Boelter 2432 Kai Zeng (kzeng.ucla at gmail dot com), office hours Thursday 1-3pm, Boelter 2432 Final Thursday, March 17, 11:30am-2:30pm, Boe… text/html 2011-03-16T14:17:06-07:00 bchengcnix http://www.read.cs.ucla.edu/111/notes/lec17c?rev=1300310226&do=diff Distributed Systems II By Cheng, Leibzon, Leo The following are interactions between user programs, the operating system and the networking hardware in distributed systems. User applications use system calls, file descriptors, and sockets to talk to remote systems on the network. This is similar to how programs interact with disk drives and write to and from files on a file system.