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Bill McCarthy asks “Are Iterators Fundamentally Flawed?”

by Jonathan Allen Follow 186 Followers on  Aug 05, 2008 9

Iterators are at the core of .NET programming. Only rarely do developers actually work against indexed data, preferring to use for-each loops for most tasks. But is this inherently sequential access method appropriate as we turn more to multi-threaded applications?

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Article: Introducing Multithreaded Programming to JavaScript

by Ryan Slobojan Follow 0 Followers on  Jul 16, 2008 10

In this article, which was originally published on InfoQ Japan, Daisuke Maki describes some of the challenges of developing responsive AJAX applications, and presents Concurrent.Thread as a solution to easing the complexity involved in asynchronous communcation in AJAX.

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Article: Do Java 6 threading optimizations actually work? - Part II

by Srini Penchikala Follow 15 Followers on  Jun 30, 2008 3

In part 2 of "Java 6 threading optimizations" article series, author Jeroen Borgers examines various threading optimizations and JVM arguments to manage them. He also talks about factors like On Stack Replacement (OSR), Heap Management and Lock object data size which could significantly affect the performance of multi-threaded java applications.

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Concurrency Presentation Scheduled for the PDC Pre-Conference Sessions

by Jonathan Allen Follow 186 Followers on  May 29, 2008

Microsoft's The Parallel Computing Platform team will be presenting on Concurrent, Multi-core Programming for Windows and .NET during the PDC pre-conference Sessions. These sessions are day-long, in-depth presentations on specific topics. Held the Sunday before the main conference, a separate registration is required.

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Breaking Changes in the .NET ThreadPool

by Jonathan Allen Follow 186 Followers on  May 13, 2008

When .NET 2.0 SP 1 was released with .NET 3.5, the thread pool underwent some significant changes. As Michael C. Kennedy discovered, not all were for the best.

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Microsoft, Intel to invest $20M in parallel computing

by Abel Avram Follow 4 Followers on  Mar 27, 2008 2

Microsoft and Intel have recently announced a $20 million joint investment into parallel computing over the next 5 years.

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Common Ruby MVM API research kicked off

by Werner Schuster Follow 4 Followers on  Feb 28, 2008

Research on the topic of Multiple VM (MVM) Ruby will be conducted at the University of Tokyo together with Sun's JRuby team. The work will investigate issues such as communication between VMs and a common API across all Ruby implementations, with solutions provided initially for Ruby and JRuby.

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Rubinius adds Multi-VM support

by Werner Schuster Follow 4 Followers on  Jan 16, 2008

Rubinius adds a new feature called "Multi-VM", which allows to run multiple Ruby VMs inside an OS process. We talked with Evan Phoenix of the Rubinius project about the benefits and implementation of this feature.

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Programming for Parrallelism: The Parallel Hierarchies Pattern

by Sadek Drobi Follow 0 Followers on  Aug 29, 2007 2

Multi-core processors offer new performance opportunities. Shekhar Borkar from Intel highlighted, however, that software development practices have to be retooled to leverage this potential. In this vein, Prof. Jorge L. Ortega-Arjona from the National Autonomous University of Mexico has recently introduced a new architectural pattern for parallel programming: Parallel Hierarchies pattern.

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Ruby 1.9 adds Fibers for lightweight concurrency

by Werner Schuster Follow 4 Followers on  Aug 24, 2007 7

Fibers were recently in the Ruby 1.9 branch. The Coroutine-like concept has many uses, such as implementing lightweight concurrency and others. We look at the concept and influences of Fibers in Ruby 1.9, as well as code samples.

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Rubinius Internals: Threading, ObjectSpace, Debugging

by Werner Schuster Follow 4 Followers on  Jul 20, 2007

We continue the interview with Rubinius creator Evan Phoenix and talk about internals of how the VM uses bytecode manipulation for fast debugging, problems of implementing ObjectSpace and Threading.

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Interview: Ezra Zygmuntowicz on Engine Yard and Rails Deployment

by Werner Schuster Follow 4 Followers on  May 17, 2007 1

Exclusive InfoQ interview with Rails deployment guru Ezra Zygmuntowicz. The topics include scaling Rails, Ruby threading, and Ezra's venture Engine Yard, an interesting new Rails hosting service that employs Xen and virtualization to provide scalable service.

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A Replacement for .NET's Flawed ReaderWriterLock

by Jonathan Allen Follow 186 Followers on  Mar 05, 2007

Visual Studio 2007 will have a new lock called ReaderWriterLockSlim. According to Joe Duffy, in addition to being faster, it solves some of the nastier design flaws of its predecessor.

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Parallel LINQ: add automatic multithreading to LINQ queries

by Jonathan Allen Follow 186 Followers on  Dec 02, 2006

With multi-core CPUs finding their way into server farms and the desktop not far behind, new techniques to take advantage of them are desperately needed. Microsoft is seeking to address these with Parallel LINQ, a research project to add automatic multithreading to LINQ queries.

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Multi-core Processors: Good or Bad for Java

by Scott Delap Follow 0 Followers on  Nov 27, 2006 3

Two recent items on the internet have looked at the topic of multi-core processors and Java. A recent article by Randall Scarberry of JavaWorld.com looks at using the Java concurrency API to write multi-threaded algorithms. Billy Newport of IBM also recently written a blog post detailing how Java may not be well suited for multi-core processors.

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