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  • Profiling java.util.concurrent locks

    by Yao Qi, Raja Das, and Zhi Da Luo on  May 27, 2010 2

    IBM’s Yao Qi, Raja Das, and Zhi Da Luo describe jucprofiler, an alphaWorks tool designed to profile multicore applications that make use of the java.util.concurrent classes introduced in Java 5.

  • Memory Barriers and JVM Concurrency

    by Dennis Byrne on  Mar 08, 2010 2

    Memory barriers, or fences, are a set of processor instructions used to apply ordering limitations on memory operations. This article explains the impact memory barriers have on the determinism of multi-threaded programs. We'll look at how memory barriers relate to JVM concurrency constructs such as volatile, synchronized and atomic conditionals.

  • Service Dynamics: the lazy man's way

    by Todor Boev on  Jul 29, 2009 2

    This article describes "the hardest topic in OSGi, how to deal with service dynamics," based on personal experience. Two factors, concurrency and direct service references, make the problem "fiendishly hard." An import and an export policy should form a comprehensive doctrine for dealing with service dynamics and the article explores two export policies with their corresponding doctrines.

Concurrency and Immutability

Posted by Dhanji Prasanna on  Jun 26, 2009

This article explores the issue of immutability as a function of concurrency demands in modern software applications. The discussion occurs in the general context of dependency injection. 15

Using the Concurrency and Coordination Runtime

Posted by Nick Gunn on  Jan 28, 2009

Nick Gunn provides a practical introduction CCR for .NET. CCR radically changes the way multi-threaded applications are written in .NET, shifting the focus from threads to asynchronous tasks. 5

Using Ruby Fibers for Async I/O: NeverBlock and Revactor

Posted by Werner Schuster on  Aug 28, 2008

Ruby 1.9's Fibers and non-blocking I/O are getting more attention - we talked to Mohammad A. Ali of the NeverBlock project and Tony Arcieri of the Revactor project. 1

Introducing Multithreaded Programming to JavaScript

Posted by Daisuke Maki , translated by Daisuke Maki   on  Jul 10, 2008

While increasingly more websites are utilizing AJAX, it is still difficult to develop complicated AJAX applications. This article explores how multithreading eases some of these issues. 10

Do Java 6 threading optimizations actually work? - Part II

Posted by Jeroen Borgers on  Jun 27, 2008

Jeroen Borgers examines if biased locking, lock coarsening, lock elision by escape analysis and adaptive spin locking techniques in the latest JVMs actually work in highly-concurrent apps. 3

Do Java 6 threading optimizations actually work?

Posted by Jeroen Borgers on  Jun 18, 2008

Jeroen Borgers examines if biased locking, lock coarsening, lock elision by escape analysis and adaptive spin locking techniques in the latest JVMs actually work in highly-concurrent apps. 16

Scalability Principles

Posted by Simon Brown on  May 21, 2008

Simon Brown distills some key scalability principles derived from a summit of architects and adds his own perspectives. 7

Ruby Concurrency, Actors, and Rubinius - Interview with MenTaLguY

Posted by Werner Schuster on  Jan 31, 2008

Concurrency, Actors, Fibers/Coroutines, Rubinius' Multi-VM, and more - a lot of interesting topics. We caught up with Ruby's MenTaLguY who can shed light about all of them. 1

The Box: A Shortcut to finding Performance Bottlenecks

Posted by Kirk Pepperdine on  Sep 21, 2007

Finding performance bottlenecks can be a difficult task and it can get more difficult as our applications grow in size. The Box is a methodology tool that focuses us efforts to improve performance. 6

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