Chapter 9 of High Performance Parallelism Pearls presents several optimizations that are usually necessary to obtain good performance on an Intel Xeon Phi coprocessor that include: introducing a softening factor, exploring the impact of single- vs. double-precision, Improving tililing, utilizing an SoA (Structure of Arrays) layout, generating code that does not maintain IEEE … [Read more...]
Optimizing Gather/Scatter Patterns On Intel Xeon Phi
Many modern microarchitectures rely on single-instruction multiple-data (SIMD) execution to provide high compute capabilities in an energy efficient manner. Such microarchitectures including those employed by the most recent Intel Xeon processors and Intel Xeon Phi coprocessors are optimized and/or better suited to dealing with contiguous loads and stores than non-contiguous … [Read more...]
Deep-Learning And Numerical Optimization
The massively parallel mapping and code described in this chapter is generic and can be applied to a broad spectrum of numerical optimization and machine-learning algorithms ranging from neural networks to support vector machines to expectation maximization and independent components analysis. Many of these techniques are heavily used in lucrative data-mining and social media … [Read more...]
HTML5 Progress – Confirmed Netflix Works With Chrome And Ubuntu 14.04LTS
Ubuntu 14.04 users can now simply load Netflix and start viewing - no beta builds, wine emulation or other work-arounds. Hopefully other services like Amazon Instant Video will follow suite. … [Read more...]
Intel Xeon Phi Provides Cambridge 30x Speedup in Production COSMOS WALLS Code
Professor Paul Shellard, the COSMOS Director at Cambridge University reports a 30x speedup of the heavily utilized production WALLS code and he notes "Our expectation is that all our cosmological field theory codes, like WALLS, will have similarly large speed-ups when optimized and ported to Xeon Phi." Currently the project is transferring a larger portion of the CMB analysis … [Read more...]
Parallel Evaluation Of Fault Tree Expressions
Readers are guided through a progression from a scalar fault tree code to one mapped effectively to Intel Xeon Phi with the open-source ispc (Intel SPMD Program Compiler). Fault trees express failure relationships between systems using Boolean logic to evaluate the vulnerability of systems based on component reliability, system redundancy, physical protection, and other — … [Read more...]
Plesiochronous (Loosely Synchronous) Phasing Barriers To Avoid Thread Inefficiencies
Jim Dempsey bests expert Intel programmers by 40% - 50% simply by using a little bit of ingenuity, along with a slightly different programming technique. He notes that, "a substantial portion of previously lost thread barrier wait time" can be recovered simply by using loosely synchronous (plesiochronous) barriers instead of strictly synchronous barriers. Jim points out that, … [Read more...]
Micron Automata Processor SDK Now Available – Includes Online Demo!
Click here to try a web-enabled intro simulation or visit micronautomata.com to sign up for a full preview of the Micron Automata Processor SDK (Software Development Kit) that includes a visual development environment, compiler, design rules checker, regular expression to automata generator and AP simulator. The SDK is also available through membership with the Center for … [Read more...]
Optimizing for Reacting Navier‐Stokes Equations
Antonio Valles and Weiqun Zhang note the optimizations discussed in their High Performance Parallelism Pearls chapter that, "significantly improved concurrency on both Intel Xeon Phi coprocessors and Intel Xeon processors" by transforming a fine-grain thread parallel approach to a more coarse-grain, memory allocation considerate approach plus improving vectorization. They … [Read more...]
NASA Charts Path For CFD To 2030 – Projects Future Computer Technology!
The recent NASA-sponsored report CFD Vision 2030 Study: A Path to Revolutionary Computational Aerosciences is a must-read for everyone involved in Computational Fluid Dynamics and a very interesting read for those involved in computer technology. In a nutshell, “A single engineer/scientist must be able to conceive, create, analyze, and interpret a large ensemble of related … [Read more...]