Blog Archives

July, 2009

A Public Service Announcement ...

After just getting the kabash by somebody else's poorly written, obviously not tested, definitely ill conceived multithreaded code, I felt an overwhelming urge to pause for a public service announcement.

Flowcharts Lost and Regained

Do you remember flowcharts? Flowcharts were/are a crucial tool in developing the flow of the logic in a structured program, process, an algorithm, etc. I remember how excited I was when I bought my first green plastic flowchart template. Some of my flowcharts were pages long but the process of flowcharting always clarified my logic .

Fan: A Portable Language is Bringing Actors to JavaScript

Fan, another new programming language developed in the multicore era, has recently launched its 1.0.45 release. It is a very active open source project with a very interesting approach to many modern concurrent programming challenges.

Keeping Parallelism Balanced is a Must

It is very important to optimize applications for existing and forthcoming multicore microprocessors. However, a lack of balance in parallelism levels could lead to explosive parallelism with resulting slowdown rather than speedup.

Microsoft Parallel Computing Platform

David Callahan is a Microsoft Distinguished Engineer. Prior to Microsoft, David was at Tera Computer which in 2000 acquired and became Cray, Inc., where he worked on High Performance Computing (HPC). At Microsoft, David is a member of the Parallel Computing Platform team.

Think Parallel in High School

This I believe: "Parallel Programming is Fundamental"

So - next week, I'm part of a small group heading off to put actions to these thoughts and teach parallel programming for three days to high school students and some high school teachers.

What You See Is What You Get...

We all know that trying to design and understand the behavior of programs that contain concurrency/parallelism is more difficult than understanding single-threaded programs.

Going Parallel: Part 5 -- Checking for Parallel Errors

In the previous blog, I created an application that calculated the value of Pi. In this blog I show how to detect and correct the errors that I inadvertently introduced in my last posting.

Using VirtualBox 3.0 Virtualization Software to Measure Multicore Scalability

The new Sun's VirtualBox virtualization software release offers very interesting features to allow developers to measure multicore scalability. As these new features were not available in previous versions, it is very important to consider them when evaluating a virtualization solution in order to test parallel performance in different operating systems and hardware environments.

Actors, Messages and Low Lock Contention for Java

Using actors and messages, concurrency is easier to understand. However, most developers don't want to learn a new programming language in order to use actors and messages. If you want to forget a bit about threads and locks, you can add nice actor support to an existing Java application using Jetlang.

Of Course The Transformers are Multicore with SMT technology

Moore's Law, Amdahl's Law, Murphy's Law. It's getting to be a bit much.

Calendar

October 2009
September 2009
August 2009
July 2009
June 2009
May 2009
April 2009
March 2009
February 2009
January 2009
December 2008

Real World Parallelism Webinar Series
  • November 17, 2009
    Visual Effects for Animation - presented by DreamWorks Animation
    Speaker: Ron Henderson (Bio)

    Ron Henderson manages the FX Tools group at DreamWorks Animation, where he is responsible for developing physical simulation and procedural modeling tools. These systems have been used for key visual effects in recent films such as Kung Fu Panda and Monsters vs. Aliens (March 2009).

    Prior to joining DreamWorks in 2002 he was a senior scientist at Caltech with a joint appointment to the Applied Math and Aeronautics departments, where he worked on efficient techniques for the direct numerical simulation of fluid turbulence.

    Abstract:
    In this webinar, Ron Henderson will show examples of visual effects, from hair and feathers to smoke and fire, from a variety of DreamWorks Animation feature films. He will discuss in general terms the kinds of techniques used to achieve particular visual effects. Finally, Henderson will show a detailed breakdown of the dam-breaking scene from Madagascar: Escape 2 Africa, demonstrating how different elements of key frame animation, simulation, and rendering are combined in a real production shot.

  • December 1, 2009
    A Quick and Easy Way to Parallelize a Legacy Codebase with Intel® Threading Building Blocks (TBBs)
    Speaker: Bernard Laberge, Avid, Senior Principal Engineer (Bio)

    Bernard Laberge is a senior principal engineer in the video editors division at Avid. During his seven years with the company he has been actively involved in the replacement of the legacy video processing engines used by Avid editors with a common hardware-abstracted, component-based video processing engine currently running on the CPU with SIMD optimized code, GPU, and dedicated hardware.

    Abstract:
    Learn how to overcome the limitations of a thread-based scheduler, including dealing with the absence of recursive parallelism support and the inefficient handling of unbalanced processing load. Bernard Laberge addresses how Avid resolved the expensive refactoring of their thread-based scheduler into a task-based solution by choosing Intel® Threading Building Blocks (TBBs). He explores how Avid was able to easily integrate the Intel TBBs into their video editor applications and more than 5 million lines of code.

  • December 15, 2009
    How to Use Intel® Parallel Studio to Streamline Code Development in a Multicore Environment
    Speaker: Matt Dunbar, Director for Performance Technology, SIMULIA (Bio)

    Matt Dunbar is the director for performance technology at SIMULIA. Since joining the company in 1993, he has worked on parallelization of the Abaqus suite of products, initially for shared memory architectures and more recently for distributed memory architectures. Dunbar has also been intimately involved in selecting both the hardware and software tools used in the development of the Abaqus product line.

    Abstract:
    Resolve elusive, costly multithreading errors quickly and efficiently with Intel® Parallel Studio. While many coding problems that lead to bugs in software applications are typically straightforward logic errors, errors in managing memory and in multithreading code can sometimes take weeks to months to diagnose and fix. Matt Dunbar explores how and why taking advantage of multicore processors through multithreaded code is critical for compute-intensive applications. While spotlighting his work on SIMULIA's Abaqus finite element solver, Dunbar addresses the need for multicore execution and shares his experiences using Intel Parallel Studio to streamline code development in a multicore environment.