This chapter in High Performance Parallelism Pearls by Andrey Vladimirov focuses on the use of Intel VTune Amplifier XE reports to understand where to apply optimization on matrix transposition, a small and self-contained workload of great practical value. The optimization process applied to the code relies exclusively on programming in a high-level language plus utilization of … [Read more...]
Characterization And Optimization Methodology Applied To Stencil Computations
The chapter discuss characterization and optimization methodology applied to a 3D finite differences (3DFD) algorithm used to solve constant or variable density isotropic acoustic wave equation (Iso3DFD). From an unoptimized version to the most optimized, the authors achieved a six-fold performance improvement on Intel Xeon E5-2697v2 processors and a nearly thirty-fold … [Read more...]
Portable Performance with OpenCL On Intel Xeon Phi
This High Performance Parallelism Pearl show the potential for using the OpenCL™ standard parallel programming language to deliver portable performance on Intel Xeon Phi coprocessors, Xeon processors, and many-core devices such as GPUs from multiple vendors. This portable performance can be delivered from a single program without needing multiple versions of the code, an … [Read more...]
High Performance Ray Tracing With Embree On Intel Xeon Phi
Ray tracing is a technique for generating images of synthetic scenes. Because ray tracing simulates the physics of light transport in the real world, it can be used to achieve high quality and even photorealistic results. The chapter authors in High Performance Parallelism Pearls describe how the Intel Embree ray tracing kernel library can be used to achieve high performance … [Read more...]
Data Transfer Using The Intel COI Library
This short chapter gives an introduction to the Intel COI library and discusses the pros and cons of different data buffers as well as provides benchmarks on transfer latency and bandwidth between the host and the coprocessor. For any non-trivial applications, there is likely going to be a need to share data between the host and the coprocessor. These valuable information are … [Read more...]
Performance Optimization Of Black-Scholes Pricing On Intel Xeon Phi
Who would have thought that a mere two hundred lines of code provide so many capabilities! The chapter authors (Iosif Meyerov, Alexander Sysoyev, Nikita Astafiev, and Ilya Burylov) apply their optimization expertise for Intel Xeon and Intel Xeon Phi to calculate the fair prices of a set of European options. They chose this the Black-Scholes calculation for the following … [Read more...]
Efficient Nested Parallelism On Large Scale Systems
Choosing right threading library is critical for application performance, as different threading libraries provide significantly different performance behavior, especially when dealing with the complex computer systems as Intel Xeon Phi coprocessor and NUMA Intel Xeon processor machines. Unfortunately, choosing the right threading library is not enough, addition application … [Read more...]
NWChem Quantum Chemistry Simulations at Scale
This chapter describes the performance of NWChem's CCSD(T) method running on a large-scale hybrid cluster of 460 dual-socket Xeon E5-2600 series nodes each of which is equipped with two Intel Xeon Phi 5110P coprocessor cards (a total of 62.5k hybrid cores). The chapter authors describe how, without any low-level programming, offload transfers and compute kernels have been … [Read more...]
Author Call for Volume 2 Of High Performance Parallelism Pearls
James Reinders and Jim Jeffers have opened up proposal submissions for another Intel Xeon and Intel Xeon Phi Pearls book tentatively titled, High Performance Parallelism Pearls – Multicore and Many-core Programming Approaches! It is expected that the submission deadline will be March 7, 2015. Proposal submission can be made here. Don't miss this opportunity to contribute … [Read more...]
Native File Systems on Intel Xeon Phi
A teraflop/s computational capability is useless without data. The Intel Xeon Phi family supports a number of file systems including Lustre, NFS, Fraunhofer BeeGFS® (formerly FHGFS), and the Panasas® PanFS® file system. The chapter author, Michael Hebenstreit, also discusses the importance of a correct network setup. He notes in his chapter summary (courtesy Morgan … [Read more...]