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Performance Essentials with OpenMP 4.0 Vectorization

Performance Essentials with OpenMP 4.0 Vectorization

Techniques a developer can use to utilize vector hardware to potentially improve application performance by using explicit vector programming methods with OpenMP* 4.0 in C/C++.

  • Developers
  • C/C++
  • Intel® Parallel Studio XE
  • OpenMP 4.0
  • Explicit Vector Programming
  • pragma omp declare simd
  • vector lanes
  • OpenMP*
  • Vectorization
  • Diagnostic 15037: loop was not vectorized: vectorization possible but seems inefficient (Fortran)

    This diagnostic can also occur in the form:

        remainder loop was not vectorized: vectorization possible but seems inefficient

    Cause:

    The compiler only auto-vectorizes a loop if its internal heuristics indicate that a speed-up is likely. If a speed-up seems unlikely or is too uncertain, the compiler emits the message "vectorization possible but seems inefficient" and does not vectorize the loop. Common reasons for this include:

  • Apple OS X*
  • Linux*
  • Microsoft Windows* (XP, Vista, 7)
  • Microsoft Windows* 8.x
  • Fortran
  • Intel® Cluster Checker
  • Intel® Fortran Compiler
  • Intel® Fortran Composer XE
  • Intel® Visual Fortran Composer XE
  • Intel® Fortran Studio XE
  • Intel® Parallel Studio XE
  • error
  • warning
  • remark
  • Creating Eclipse External Tool configurations for Intel® VTune Amplifier

     

    Introduction

    The purpose of this article is to show how we can easily integrate VTune™ Amplifier into Eclipse* by using the External tool configuration capability in Eclipse.  We will create several Eclipse external tool configurations for both launching collections and displaying collected data.

    Overview

    These are are the tool configurations we will be creating:

  • Developers
  • Linux*
  • Microsoft Windows* (XP, Vista, 7)
  • Tizen*
  • Unix*
  • Yocto Project
  • Server
  • Tizen*
  • Windows*
  • C/C++
  • Intermediate
  • Chromebooks - Intel® XDK

    Chromebooks and the Intel® XDK

    The Chromebook is an amazing device for Intel XDK development. Today we’ll show you how to install the Intel XDK on a Chromebook using Crouton. Crouton utilizes a chroot environment to install a guest operating system along side Chrome OS. There are a few easy steps involved to accomplish this.

  • Developers
  • Android*
  • Apple iOS*
  • HTML5
  • HTML5
  • Advanced
  • Intermediate
  • Intel® XDK
  • xdk
  • ChromeBook
  • Development Tools
  • Diagnostic 15046: loop was not vectorized: existence of vector dependence (Fortran)

    Cause:

    The compiler has detected a potential backward dependency between loop iterations that could make vectorization unsafe. The compiler will not auto-vectorize a loop if there are any data values for which vectorization could lead to an incorrect result. Two common examples are: 

    1. reading from an array element after writing to it in a preceding iteration;

    2. writing data using pointers that might be aliased to other data that is also being accessed in the loop. (That is, the data might overlap).

    Examples:

  • Apple OS X*
  • Linux*
  • Microsoft Windows* (XP, Vista, 7)
  • Microsoft Windows* 8.x
  • Fortran
  • Intel® Fortran Compiler
  • Intel® Fortran Composer XE
  • Intel® Visual Fortran Composer XE
  • Intel® Fortran Studio XE
  • Intel® Parallel Studio XE
  • error
  • warning
  • remark
  • CERTIFACE E INTEL, juntos no combate às Fraudes

    Certiface é um aplicativo para a certificação de pessoas via web. Utiliza tecnologia de ponta em biometria facial para evitar a duplicidade das faces e combater as práticas de fraude. Seu sistema opera em nuvem, a identidade do cliente é preservada e não existe contato físico.
  • Developers
  • Partners
  • Android*
  • Apple iOS*
  • Apple OS X*
  • Linux*
  • Microsoft Windows* (XP, Vista, 7)
  • Microsoft Windows* 8.x
  • Android*
  • Business Client
  • Server
  • Advanced
  • Intel® Integrated Performance Primitives
  • biometria facial
  • Cloud Computing
  • Development Tools
  • Mobility
  • Sensors
  • Small Business
  • User Experience and Design
  • Creating cool animations and transitions in HTML5 app for Intel Android devices

    One problem with earlier versions of HTML was the lack of multimedia techniques. You could not show a video or draw on the screen. With HTML5, new elements such as and have been released. These elements give developers the ability to use
  • Android*
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