PPT-CS 140 Lecture Notes: Concurrency

Author : marina-yarberry | Published Date : 2015-09-18

Slide 1 Too Much Milk Roommate A 300 Arrive home no milk 305 Leave for store 310 Arrive at store 315 Leave store 320 Arrive home put milk away CS 140 Lecture

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CS 140 Lecture Notes: Concurrency: Transcript

Slide 1 Too Much Milk Roommate A 300 Arrive home no milk 305 Leave for store 310 Arrive at store 315 Leave store 320 Arrive home put milk away CS 140 Lecture Notes Concurrency. ŒŽ‘ŒŽ‘Œ’Ž\fŒŽ\f\f’‡“\f”\f\b\fƒŒ Slide . 1. Too Much Milk. . Person A. 3:00. Arrive home: no milk. 3:05. Leave for store. 3:10. Arrive at store. 3:15. Leave store. 3:20. Arrive home, put milk away. CS 140 Lecture Notes: Concurrency. Slide . 1. Too Much Milk With Locks. Both threads:. struct. lock l;. .... l. ock_acquire. (&l);. if (milk == 0) . {. . . buyMilk. ();. }. lock_release. (&. l);. CS 140 Lecture Notes: Locks. Sadhna Kumari. OUTLINE. ACID Properties. 2-Phase Commit Protocol. TPS. Serializability. Concurrency Control Protocols. Current Research. Future. References. ACID PROPERTIES. Atomicity: . A . transaction is . Seminar: Transaction Processing (Bachelor). SS 2009. Dennis . Stratmann. Outline. Goal and Overview. Examine Three Approaches to CC on RD:. 1. Predicate-Oriented Concurrency Control. 2. Relational Update Transactions. -. Bhavya. . Kilari. Dr. . Yanqing. Zhang, . CSc. 8320. PREVIEW. P. ART. I. : . I. NTRODUCTION. Transaction Processing System. [. R. Chow & T. Johnson, 1997. Slide . 1. Memory Layout for Process. Code. 0. ∞. Data. Stack. CS 140 Lecture Notes: Linkers. Slide . 2. Creating a Process. 101010101010101010101010101010101010101010101010. cc. x.c. x.s. as. x.o. Slide . 1. Uniprocessor . Locks. void . lock_acquire. (. struct. lock *l) {. . intr_disable. ();. if (!l->locked) {. l->locked = 1;. } else {. . queue_add. (&l->q, . †€€€ŒŒŒŒ \r\f\t \r\f\f \r\f\r\r Prof. O. Nierstrasz. Selected material © Magee and Kramer. © Oscar Nierstrasz. 2. Roadmap. Modelling Concurrency. Finite State Processes . Labelled Transition Systems. Java Threads. Thread creation. Œ]ŒvŒŒ]Œ]&Œ Slide . 1. Access Matrix. File A. File B. File C. Printer 1. Alice. RW. RW. RW. OK. Bob. R. R. RW. OK. Carol. RW. David. RW. OK. Faculty. RW. RW. OK. CS 140 Lecture Notes: Protection. Slide . 2. Access Matrix. Database Concurrency Control. 1 Purpose of Concurrency Control. To enforce Isolation (through mutual exclusion) among conflicting transactions. . To preserve database consistency through consistency preserving execution of transactions.. Software & the Concurrency Revolution by Sutter & Larus ACM Queue Magazine, Sept. 2005 For CMPS 5433 - Halverson 1 In a Nutshell “The concurrency revolution is primarily a software revolution

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