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by Doug Lea. Last update: Fri Nov 16 08:46:48 2018 Doug Lea Introduction This guide is mainly intended for expert programmers familiar with Java concurrency, but unfamiliar with the memory order modes available in JDK 9 provided by VarHandles. Mostly, it focuses on how to think about modes when developing parallel software. Feel free to first read the Summary. To get the shockingly ugly syntactic
When to use parallel streams [Draft, 1 September 2014. For now, minimally formatted pending placement decision.] The java.util.streams framework supports data-driven operations on collections and other sources. Most stream methods apply the same operation to each data element. When multiple cores are available, "data-driven" can become "data-parallel", by using the parallelStream() method of a col
Maintained by Doug Lea To join a mailing list discussing this JSR, go to: http://altair.cs.oswego.edu/mailman/listinfo/concurrency-interest. (Archived postings may also be found at MarkMail's searchable archives.) While JSR166 has completed and is a now final approved JCP spec, the expert group remains involved in incremental improvements and changes to the java.util.concurrent package and related
Where: Normal Loads are getfield, getstatic, array load of non-volatile fields. Normal Stores are putfield, putstatic, array store of non-volatile fields Volatile Loads are getfield, getstatic of volatile fields that are accessible by multiple threads Volatile Stores are putfield, putstatic of volatile fields that are accessible by multiple threads MonitorEnters (including entry to synchronized me
This set of excerpts from section 2.2 includes the main discussions on how the Java Memory Model impacts concurrent programming. For information about ongoing work on the memory model, see Bill Pugh's Java Memory Model pages. Consider the tiny class, defined without any synchronization: final class SetCheck { private int a = 0; private long b = 0; void set() { a = 1; b = -1; } boolean check() { re
Doug Lea's Home Page Surface mail: Doug Lea, Computer Science Department , State University of New York at Oswego, Oswego, NY 13126 | Voice: 315-312-2688 | Fax: 315-312-5424 | E-Mail: dl@cs.oswego.edu | vita | shortbio Documents Books Online supplement to the book Concurrent Programming in Java: Design Principles and Patterns, (second edition) published November 1, 1999 by Addison-Wesley HTML edit
by Doug Lea [A German adaptation and translation of this article appears in unix/mail December, 1996. This article is now out of date, and doesn't reflect details of current version of malloc.] Introduction Memory allocators form interesting case studies in the engineering of infrastructure software. I started writing one in 1987, and have maintained and evolved it (with the help of many volunteer
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