Перспективные форматы видео. Новое направление

This past week, Intel announced its membership in the Alliance for Open Media. And with that, we reinforce our commitment to open formats and announce our efforts for delivering the next generation of video coding tools. With founding partners Amazon, Cisco, Google, Intel, Microsoft, Mozilla, and Netflix, the Alliance for Open Media is collaborating to develop the next generation video formats that will reduce the end user cost of video delivery by being optimized for the next generation processors.

Understanding bad performances for an offloaded hybrid MPI-OpenMP application


I have ported my application on nodes with two Intel's Xeon Phi cards. I notice that performances are very disappointing.
As it is a MPI application, I have to give some more informations about how it works (sorry for the long text).


MPI parallelization is done with a classical 3D domain decomposition using a cartesian grid of subdomains (one process per subdomain). They have ghost cells (26 neighbours) which need to be refreshed several times per time iteration (explicit multi step scheme in time).

Infini Band Network configuration On Xeon Phi

I need your help in setting up  Xeon Phi coprocessor in cluster where I’m facing some issues in doing that. Below I’ve mentioned some of the points where having issues,


I’m setting up Rocks cluster where CentOS 6.6 in being used. MPSS and OFED versions are mentioned below:-

MPSS version - mpss-3.6-linux

Ofed - MLNX_OFED_LINUX-2.4-1.0.4-rhel6.6-x86_64


I’ve configured the Ethernet network on MIC with external bridging which is working in all the MIC’s in the cluster.


Enabling Multibuffer for AES-CBC Encryption in Apache* and nginx*

The OpenSSL* library v1.0.2 introduces the multibuffer enhancements for AES. Multibuffer significantly increases the performance of CBC mode encryption by processing multiple TLS records in parallel on a single hardware thread. As shown in the white paper Improving OpenSSL Performance, the multibuffer enhancements to AES-CBC encryption can result in a 50 to 100% increase in throughput. This makes it an attractive feature for web site administrators using these ciphers, and this article explains how to enable it under two popular, open source, Linux*-based web servers: Apache* HTTP Server from the Apache Software Foundation, and nginx* from Nginx, Inc.
  • Partenaires
  • Linux*
  • Serveur
  • OpenSSL
  • multibuffer
  • AES Performance
  • Advanced Encryption Standard (AES)
  • Centre de données
  • Sécurité
  • IDF'15 Webcast: Data Analytics and Machine Learning

    This Technology Insight will demonstrate how to optimize data analytics and machine learning workloads for Intel® Architecture based data center platforms. Speaker: Pradeep Dubey Intel Fellow, Intel Labs Director, Parallel Computing Lab, Intel Corporation
  • Développeurs
  • Professeurs
  • Serveur
  • Bibliothèque Intel® Data Analytics Acceleration (Intel® DAAL)
  • Bibliothèque Intel® Math Kernel Library
  • machine learning
  • Données massives
  • Informatique cloud
  • Informatique en cluster
  • Modernisation du code
  • Centre de données
  • Intel® Many Integrated Core Architecture
  • mpss restart fails before booting completes

    After recently upgrading to mpss 3.6, I've encountered the following behavior and hope someone has some insights or can help debug. When either starting or restarting the mpss service, the procedure fails. Immediately following the service start, the cards show:

    [root@host ~]# micctrl -s
    mic0: boot failed
    mic1: boot failed
    mic2: boot failed
    mic3: boot failed


    However, after several (on the order of 10) seconds, the cards appear to successfully complete boot:

    Caffe* Training on Multi-node Distributed-memory Systems Based on Intel® Xeon® Processor E5 Family

    Caffe is a deep learning framework developed by the Berkeley Vision and Learning Center (BVLC) and one of the most popular community frameworks for image recognition. Caffe is often used as a benchmark together with AlexNet*, a neural network topology for image recognition, and ImageNet*, a database of labeled images.
  • Développeurs
  • Professeurs
  • Étudiants
  • Linux*
  • Services Cloud
  • Serveur
  • C#
  • C/C++
  • Python*
  • Avancé
  • Débutant
  • Intermédiaire
  • OpenMP*
  • machine learning
  • Enseignement
  • Données massives
  • Informatique en cluster
  • Modernisation du code
  • Centre de données
  • Code source libre
  • Informatique parallèle
  • Install Manual Change

    I have had several issue rebuilding the MPSS on Centos 7/RHEL and later here is a proposed change to the manual to fix it.

    Problem Symptoms: Are that in section

    the command: 

    yum install kernel-headers kernel-devel 

    Does not install all of the right source and the build will fail.

    This command should be used in it's place 

    sudo yum install "kernel-devel-uname-r == $(uname -r)"

    This will put everything in the right place under 

    /lib/moduale/(uname -r)/build (which is a link)

    Intel® Xeon® Processor - Solution Briefs

    Doubling performance for your most complex MSC Nastran simulations can deliver a range of high-value options for your engineering and design teams. You may be able to obtain results hours or even days sooner to shorten your design cycles. Or you may choose to test more design options to accelerate innovation, or explore a wider range of coupled variables to gain a deeper understanding of real-world product behavior.
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  • LIBXSMM Prefetching on Xeon Phi


    I am attempting to use LIBXSMM on a Xeon Phi and it fails to compile when I use

        make install OFFLOAD=1 PREFETCH=1 MNK="2,4,6,8,10,12,14,16,18,20,23"

    I am getting the error

        ~/libxsmm/samples/smm/specialized.cpp(143): error: call of an object of a class type without appropriate operator() or conversion functions to pointer-to-function type
                xmm(pa, pb, pc LIBXSMM_PREFETCH_ARGA(pa + asize) LIBXSMM_PREFETCH_ARGB(pb + bsize) LIBXSMM_PREFETCH_ARGC(tmp) LIBXSMM_PREFETCH_ARGC(pc + csize_act));

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