PPT-CMPT 401 Summer 2007 Dr. Alexandra Fedorova

Lecture V InterProcess Communication Course Progress the Big Picture Architectural models of distributed systems determined by placement and roles of components OS Support for implementation of DS of components . ca Abstract Contention for shared resources on multicore processors remains an unsolved problem in existing systems despite signi64257cant re search efforts dedicated to this problem in the past Previous solu tions focused primarily on hardware techn ATD Data Team Subcommittee report. January 2011. Quantitative Data Analyzed. :. Fall 2007 Cohort Data: Transfers, graduates, and graduate transfers (unduplicated). Graduates who did and did not transfer in English, reading, and math. Dr. Alexandra Fedorova. Lecture . X. : . Transactions. Transactions. A transaction is a collection of actions logically belonging together. To the outside world, a transaction must appear as a . single indivisible operation. Introduction to Operating Systems. . Introduction to Deadlocks. Acknowledgement: some slides are taken from Anthony D. Joseph’s course material at UC Berkeley . and Dr. Janice Reagan’s course material at SFU. Introduction to Computing Science for Engineering Students. Floating Point Representation. Data Types and Conversion. © Janice Regan, 2007-2013. 1. Floating point numbers. A floating point number is represented by a mantissa and an exponent, for example 3.73696786432 * 10. Stage 3. The . hashmonaem. dynasty in . judea. 134 BCE-63 BCE. Hasmonean. Dynasty. Mattathias. Yohanan. ]. (d.159). Simon. (142-134. ). Judah. (d.168). Eleazar. (d.163). Jonathan. (152-142). John . Phase: Design. Janice Regan, 2008. 2. Map of design phase. DESIGN. HIGH LEVEL. DESIGN. Modularization. User Interface. Module Interfaces. Data. . Persistance. Subsystem. User Manual. architecture. Oliver Schulte. Introduction to . Artificial Intelligence. topics. Intelligent Agents . uninformed and informed search . Constraint Satisfaction Problems . Game playing . First-order Logic . Reasoning under uncertainty . Dr. Alexandra Fedorova. Lecture XI: Distributed Transactions. A Distributed Transaction. A transaction is distributed across n processes.. Each process can decide to commit or abort the transaction. A transaction must commit on all sites or abort on all sites. . Operating Systems. Processes. Multiprogramming. When multiple programs share the same processor . An example of . pseudoparallelism. Processes share processor (each get a short turn) so that in a perceptible length of time it appears processes run in parallel . . Mutual Exclusion. © Janice Regan, CMPT 300, 2007-2016 . 1. Implementation. Now we have the basic ideas we need. How do we actually implement mutual exclusion?. There are several approaches. Interrupt disabling. Painter and Muralist. Alexandra was born in communist Romania in 1985.. . Her father, Niki, fled Communist Romania for the United States 3 months before Alexandra was born. Two years later Alexandra and her mom, Viorica, joined him in California.. The Absence of Dill and Atticus. Where is Dill?. “The letter said he had a new father whose picture was enclosed, and he would have to stay in Meridian because they planned to build a fishing boat”. Do you think PACES is a difficult exam ?. Would you like to know what the examiners are looking for ?. Would like to learn how to . avoid silly mistakes . in the PACES exam ? . If the answer is . YES.