(9,7)小波变换的MMX实现方法

在图像压缩算法中，人们经常采用小波变换方法对图像数据进行变换处理，（9，7）小波是经常采用的，由于（9，7）小波运算是浮点运算，用传统的C语言编程来运行（9，7）小波变换，运算速度是不能令人满意的，为了尽可能块的实现小波变换，文中提出用MMX技术将浮点数变成整数运算为实现小波变换的实现方法，它比C语言实现速度快很多。     

Intel virtualization technology

A virtualized system includes a new layer of software, the virtual machine monitor. The VMM's principal role is to arbitrate accesses to the underlying physical host platform's resources so that multiple operating systems (which are guests of the VMM) can share them. The VMM presents to each guest OS a set of virtual platform interfaces that constitute a virtual machine (VM). Once confined to specialized, proprietary, high-end server and mainframe systems, virtualization is now becoming more broadly available and is supported in off-the-shelf systems based on Intel architecture (IA) hardware. This development is due in part to the steady performance improvements of IA-based systems, which mitigates traditional virtualization performance overheads. Intel virtualization technology provides hardware support for processor virtualization, enabling simplifications of virtual machine monitor software. Resulting VMMs can support a wider range of legacy and future operating systems while maintaining high performance.     

Intel develops new technology

Chipmaker Intel has developed a new technology that will improve the security of notebooks and data stored on them thanks to an architecture that authenticates users before the computer boots up.     

基于MMX技术的H.264解码器优化

新一代视频编码标准H.264为了提高编码效率采用了一系列新技术,而这些新技术的使用也极大地增加了算法的复杂度。因此,在保持编码效率的同时如何提高编解码器的运算速度成为目前研究的热点问题之一。介绍了符合H.264基本规范的解码器的基本框架和解码流程;通过复杂度分析确定了解码过程中计算最为密集的两个模块,即插值、整数余弦变换和重建模块;提出了基于MMX技术的优化方法,并对这两个模块进行了重点优化。实验结果表明,利用这些优化方法可以使解码器的平均解码速度提高到原来的1．4-2．1倍,优化效果十分显著。     

Characterizing and optimizing Java-based HPC applications on Intel many-core architecture

The increasing demand for performance has stimulated the wide adoption of many-core accelerators like Intel^® Xeon Phi^TM Coprocessor, which is based on Intel’s Many Integrated Core architecture. While many HPC applications running in native mode have been tuned to run efficiently on Xeon Phi, it is still unclear how a managed runtime like JVM performs on such an architecture. In this paper, we present the first measurement study of a set of Java HPC applications on Xeon Phi under JVM. One key obstacle to the study is that there is currently little support of Java for Xeon Phi. This paper presents the result based on the first porting of OpenJDK platform to Xeon Phi, in which the HotSpot virtual machine acts as the kernel execution engine. The main difficulty includes the incompatibility between Xeon Phi ISA and the assembly library of Hotspot VM. By evaluating the multithreaded Java Grande benchmark suite and our ported Java Phoenix benchmarks, we quantitatively study the performance and scalability issues of JVM on Xeon Phi and draw several conclusions from the study. To fully utilize the vector computing capability and hide the significant memory access latency on the coprocessor, we present a semi-automatic vectorization scheme and software prefetching model in HotSpot. Together with 60 physical cores and tuning, our optimized JVM achieves averagely 2.7x and 3.5x speedup compared to Xeon CPU processor by using vectorization and prefetching accordingly. Our study also indicates that it is viable and potentially performance-beneficial to run applications written for such a managed runtime like JVM on Xeon Phi.     

Intel Cascade Lake架构CPU SPEC CPU2017评测

SPEC CPU2017基准包中包含SPEC的下一代行业标准,是目前CPU性能评测的客观和可信的基准程序之一.采用SPEC CPU2017对Intel Cascade Lake架构的Intel Xeon Gold 6252N型号CPU做了不同内存频率、不同副本数、打开/关闭T urbo的组合测试,总结了不同应用程序在不...     

An analysis of the Intel 80×86 security architecture andimplementations

An in depth analysis of the 80×86 processor families identifies architectural properties that may have unexpected, and undesirable, results in secure computer systems. In addition, reported implementation errors in some processor versions render them undesirable for secure systems because of potential security and reliability problems. We discuss the imbalance in scrutiny for hardware protection mechanisms relative to software, and why this imbalance is increasingly difficult to justify as hardware complexity increases. We illustrate this difficulty with examples of architectural subtleties and reported implementation errors     

无线MMX技术在MPEG-4中的应用

无线MMX(Wireless MMX Technology)是用来提高移动多媒体计算性能的技术。针对无线视频通信的应用，研究了采用无线MMX来实现MPEG-4视频编解码的技术；通过对无线MMX体系结构和指令特点的分析，从指令优化和算法优化两方面给出了MPEG-4编解码器优化的关键策略。经过优化的编解码器可很好地满足无线视频通信要求。     

The Intel i386 architecture and implementation options for Oberon on it

The design of programming languages has a long tradition at ETH Zürich. With the development of the extensible operating system Oberon [1] [2] for the personal work-station Ceres, a new programming language for its implementation came into being and was called Oberon as well. Building on the solid grounds of Modula-2, the programming language Oberon [3] [4] adds features to support object-oriented programming while dropping some of the less important constructs of its predecessor. Although the Oberon system and the language have been ported to several widely-used commercial platforms [5], a version for IBM PCs is still missing. To encourage the development of Oberon for PCs, we discuss the architecture of the Intel i386 [6], the requirements of Oberon, and different implementation options for Oberon on this processor.     

基于MMX技术的H.264编码器的研究与实现

分析甚低码率视频压缩标准H.264的算法特点,基于H.264软件编码器,根据MMX技术的特点、数据结构和使用方法,用支持单指令多数据SIMD的MMX技术优化H.264的算法模块.重点讨论最耗时的DCT、IDCT、IT、IIT、帧间预测、帧内预测的运动估计、补偿模块的MMX实现算法.实验结果表明：优化后的编码器的处理速度提高到原来的1.3倍,有一定的实用价值.     

Blob在Intel PXA270上的移植

在嵌入式系统中,Bootloader是软件开发的第一个环节,在完成引导加载系统镜像的同时,扩展和增加了具体硬件模块上的功能支持,对于一个嵌入式设备后续的软件开发至关重要.Blob是一款功能强大的Bootloader, Intel PXA270是一款基于XScale架构的嵌入式处理器.本文分析了Blob的启动机制和工作原理以及在Intel PXA270平台上的移植过程.     

Auto-tuning GEMM kernels on the Intel KNL and Intel Skylake-SP processors

The Journal of Supercomputing - The general matrix–matrix multiplication is a core building block for implementing Basic Linear Algebra Subprograms. This paper presents a methodology for...     

利用DDE技术实现组态软件功能的扩展

工控组态软件利用其强大驱动程序库将各种工业监测模块有效集成,简化了监控程序的开发,因而在自动控制领域内有广泛的应用,但是对于组态软件没有给出驱动的硬件模块则不能应用组态软件来集成,这就限制了组态软件的应用,本文给出了利用动态数据交换(DDE)技术实现应用软件与组态软件数据交换的解决方案.     

安迪·布莱恩特担任英特尔副董事长

<正>2011年7月26日,美国加州圣克拉拉市——英特尔董事会选举安迪·布莱恩特(Andy Bryant)为副董事长,这个新设立的职位是为了让他在2012年5月年度股东大会后当选英特尔下届董事长而做准备。他将辅佐现任董事长简·肖(JaneShaw)的工作,直至后者明年五月退休。布莱恩特曾长期担任英特尔公司首席财务官,目前是首席行政官(CAO),他也是第二位效力于本届董事会的英特尔     

英特尔CEO保罗&#183;欧德宁：摩尔定律将继续有效

美国加利福尼亚州圣克拉拉市--英特尔公司与日本电气公司(NEC)达成协议,决定携手开发面向未来的高性能超级计算机技术,以帮助高性能计算系统的性能获得更进一步的提升.     

Intel Microprocessors–8008 to 8086

A mere six years of microprocessor evolution have yielded a three-orders-of-magnitude performance improvement.     

Investigating mobile wireless technology adoption: An extension of the technology acceptance model

This research represents a theoretical extension of the Technology Acceptance Model (TAM), which IS researchers have used to explain technologies’ perceived usefulness and individuals intention to use it. The authors developed a model, referred to as the Mobile Wireless Technology Acceptance Model (MWTAM), to test the relationship between theoretical constructs spanning technological influence processes (Perceived Ubiquity, and Perceived Reachability) and cognitive influence processes (Job Relevance, Perceived Usefulness, and Perceived Ease of Use) and their impact on Behavioral Intention. MWTAM is assessed using data collected from an online survey and analyzed using AMOS 5.0. Results provide evidence to support MWTAM as both the technological and cognitive influence processes accounted for 58.7% of the variance explained in an individual’s Behavioral Intention toward using mobile wireless technology. Additionally, the path coefficients between constructs ranged from 0.241 to 0.572 providing further evidence to support the theoretical extension of TAM.