PPT-Parallelism and Concurrency

Koen Lindström Claessen Chalmers University Gothenburg Sweden Ulf Norell Expressing Parallelism In a pure lazy language Evaluation is done when needed Evaluation order does not affect meaning of program. 1 WHY CHOOSE PARALLELISM Parallel construction also called parallelism shows that two or more ideas are equally important by stating them in grammatically parallel form noun lined up with noun verb with verb phrase Parallelism . of words:. She tried to make her pastry . fluffy. , . sweet. , . and . delicate. .. They tried to make their . work . faultless. , . complete. , and . perfect. . . adjectives . She tried to make her pastry . Prof. O. Nierstrasz. Selected material © Magee and Kramer. © Oscar Nierstrasz. 2. Roadmap. Modelling Concurrency. Finite State Processes . Labelled Transition Systems. Java Threads. Thread creation. COS 326 David Walker Princeton University Parallelism 2 • What is it? • Today's technology trends. • How can we take advantage of it? • Why is it so much harder to program Presented . by A. Craik . (. 5. -Jan-12). Research supported by funding . from . Microsoft Research and the Queensland State Government. 1. Introduction. 2. Procedural Algorithm. Sequential Implementation w/ Injected Parallelism. Lecture 1. Introduction to Multithreading & Fork-Join Parallelism. Steve . Wolfman. , based on work by Dan . Grossman. LICENSE. : This file is licensed under a . Creative . Commons Attribution 3.0 . Vijay . Pai. (PI), Deborah Bennett, . Cordelia. Brown, Yung Lu, . Sam . Midkiff. smidkiff@purdue.edu. Let’s start off pessimistically. I’ve been involved in two or three of these workshops, and the comment I’ve heard from industrial . Motivation, Challenges, Impact on Software Development. CSE 110 – Winter 2016. About These Slides. Due to the nature of this material, this lecture was delivered via the chalkboard. Every was advised that slides would not be available and that notes should be taken. . 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.. Parallel structure (also called parallelism) is the repetition of a chosen grammatical form within a sentence. By making each compared item or idea in your sentence follow the same grammatical pattern, you create a parallel construction. Motivation, Challenges, Impact on Software Development. CSE 110 – Winter 2016. About These Slides. Due to the nature of this material, this lecture was delivered via the chalkboard. Every was advised that slides would not be available and that notes should be taken. . What is Parallelism?. Parallelism is no different in English than it is in math. In writing, parallelism occurs when there are items in a series. The items must be parallel. That means they all need to be similar grammatically.. Team Time! . The following is what part of speech? . Mitch. wore a plaid shirt. . He. looked spiffy. . Antecedent- the noun or noun phrase a pronoun refers to.. To which fallacy does this example apply? . Posix Threads (Pthreads) Concurrency Chapter 26 Abstraction: Threads Here we introduce a new abstraction for a single running process: that of a thread. The state of a single thread is thus very similar to that of a process. It has a program counter (PC) that tracks where the program is fetching instructions from