Highly optimized implementation of OpenCV for the Cell Broadband Engine

Recently, real-time processing of image recognition is required for embedded applications such as automotive applications, robotics, entertainment, and so on. To realize real-time processing of image recognition on such systems we need optimized libraries for embedded processors. OpenCV is one of the most widely used libraries for computer vision applications and has many functions optimized for Intel processors, but no function is optimized for embedded processors. We present a parallel implementation of OpenCV library on the Cell Broadband Engine (Cell), which is one of the most widely used high performance embedded processors. Experimental result shows that most of the functions optimized for the Cell processor are faster than functions optimized for Intel Core 2 Duo E6850 3.00 GHz.     

Parallel exact inference on the Cell Broadband Engine processor

We present the design and implementation of a parallel exact inference algorithm on the Cell Broadband Engine (Cell BE) processor, a heterogeneous multicore architecture. Exact inference is a key problem in exploring probabilistic graphical models, where the computation complexity increases dramatically with the network structure and clique size. In this paper, we exploit parallelism in exact inference at multiple levels. We propose a rerooting method to minimize the critical path for exact inference, and an efficient scheduler to dynamically allocate SPEs. In addition, we explore potential table representation and layout to optimize DMA transfer between local store and main memory. We implemented the proposed method and conducted experiments on the Cell BE processor in the IBM QS20 Blade. We achieved speedup up to 10 × on the Cell, compared to state-of-the-art processors. The methodology proposed in this paper can be used for online scheduling of directed acyclic graph (DAG) structured computations.     

一个宽带网络综合管理系统的实时计费引擎设计

本文介绍了一个宽带网络综合管理系统的组成,该系统支持各种接入和各种应用实时计费,还实现了网络系统运营商、业务运营商、内容提供商分账的新的运营模式。文中重点讨论了该系统实时计费引擎的设计。     

The Bottom-Up Implementation of One MILC Lattice QCD Application on the Cell Blade

We report the results of the bottom-up implementation of one MILC lattice quantum chromodynamics (QCD) application on the Cell Broadband Engine™ processor. In our implementation, we preserve MILC’s framework for scaling the application to run on a large number of compute nodes and accelerate computationally intensive kernels on the Cell’s synergistic processor elements. Speedups of 3.4 × for the 8 × 8 × 16 × 16 lattice and 5.7 × for the 16 × 16 × 16 × 16 lattice are obtained when comparing our implementation of the MILC application executed on a 3.2 GHz Cell processor to the standard MILC code executed on a quad-core 2.33 GHz Intel Xeon processor. We provide an empirical model to predict application performance for a given lattice size. We also show that performance of the compute-intensive part of the application on the Cell processor is limited by the bandwidth between main memory and the Cell’s synergistic processor elements, whereas performance of the application’s parallel execution framework is limited by the bandwidth between main memory and the Cell’s power processor element.     

Implementation of mixed precision in solving systems of linear equations on the Cell processor

This paper describes the design concepts behind implementations of mixed‐precision linear algebra routines targeted for the Cell processor. It describes in detail the implementation of code to solve linear system of equations using Gaussian elimination in single precision with iterative refinement of the solution to the full double‐precision accuracy. By utilizing this approach the algorithm achieves close to an order of magnitude higher performance on the Cell processor than the performance offered by the standard double‐precision algorithm. The code is effectively an implementation of the high‐performance LINPACK benchmark, as it meets all of the requirements concerning the problem being solved and the numerical properties of the solution. Copyright © 2007 John Wiley & Sons, Ltd.     

基于单片微机的船舶主机控制仪的设计和实现方法

在我国，８０年代中期开始研究使用数字逻辑电路的船舶主机控制仪并取得一定的成功。本从提高性能的完备和技术的先进性出发，论述以单片微机为中心的船舶主机控制仪的设计和实现方法。     

The Evolution of the NOMS-IM Symposia Series: From a Gleam in the Eye to Multiple Technical Activities

This report documents the evolution of a number of symposia, along with the evolution of the associated communities. These communities launched the initial conferences, as well as benefited from the growth and evolution of these technical activities. Over the span of a couple decades, the communities grew in breadth and depth. The communities are truly global in both constituency and reach. Both symposia convene in multiple countries within multiple continents, and continue to attract new audiences. In addition, new multiple symposia series were spawned by the communities, and the richness of the technical activities and venues affords the communities enhanced value and interactions.