Open Source

Null Pointer Dereferencing Causes Undefined Behavior

I have unintentionally raised a large debate recently concerning the question if it is legal in C/C++ to use the &P->m_foo expression with P being a null pointer. The programmers' community divided into two camps. The first claimed with confidence that it wasn't legal while the others were as sure saying that it was. Both parties gave various arguments and links, and it occurred to me at some point that I had to make things clear. For that purpose, I contacted Microsoft MVP experts and Visual C++ Microsoft development team communicating through a closed mailing list.

New code release

We are excited to announce the next release of the Intel® OpenMP* Runtime Library at This release aligns with Intel® Parallel Studio XE 2015 Composer Edition Update 4.

New Features

  • Debugger support interface added to the OSS library

Bug Fixes

  • Fixed implementation of task 'final' clause
  • Fixed a crash that occurred when task dependence was used
  • Fixed hierarchical barrier in oversubscription case


SDN, NFV, DPDK and the Open Networking Platform - FAQ

Frequently Asked Questions on SDN, NFV, DPDK and the Intel® Open Network Platform Server

Why are SDN and NFV so important?

Software Defined Networking (SDN) and Network Functions Virtualization (NFV) are emerging as an alternative to traditional network design because they address many of the drawbacks of traditional hardware based networks.  SDN and NFV offer four primary benefits:

  • Developers
  • Partners
  • Professors
  • Linux*
  • Networking
  • SDN
  • NFV
  • DPDK
  • OPNP Server
  • Open
  • onp
  • Quickassist
  • Networking
  • Big Data
  • Cluster Computing
  • Data Center
  • Development Tools
  • Enterprise
  • Financial Services Industry
  • Open Source
  • Optimization
  • Virtualization
  • Runtime Design Documentation


    I am starting to dig into the runtime source code and I am wondering if there is any information available about its general organization/design. I am mostly interested in the "task"-related topics, for instance how are inter-task dependencies detected, which scheduling algorithms are implemented, and such things.

    Thanks in advance.

    how to enable multiple cores for openMP


              I'm recently learning to use openMP, it can schedule multiple threads for processing speeding up. My host PC has 4 cores, each core has 4 hardware threads. Does openMP also support scheduling  multiple cores for processing?

              As a simple example, I have below code with omp enabled.

        int i;
        printf("openMP begins!\n");
        #pragma omp parallel num_threads(4)
        for (i = 0; i < 5; i++)
            printf("Iter:%d\n", i);
        printf("openMP ends!\n");

    Ceph Erasure Coding Introduction

    Ceph introduction

    Ceph, The Future of Storage™, is a massively scalable, open source, software-defined storage system that runs on commodity hardware. Ceph has been developed from the ground up to deliver object, block, and file system storage in a single software platform that is self-managing, self-healing and has no single point of failure. Because of its highly scalable, software defined storage architecture, Ceph is an ideal replacement for legacy storage systems and a powerful storage solution for object and block storage for cloud computing environments.

    Controlling Philip Hue Lights using Intel Edison

    Have you ever wanted to control your light bulbs? Ever forget to turn off your lights before a long trip? Well Philip's has developed this smart light bulbs that allow you to control the lights via wifi called Philip Hue Lights. Philip's has a great smartphone app that let's you control the lights (setting timers, moods, etc.), but I wanted to try controlling the lights via my Intel Edison board via NodeJS. 

    Subscribe to Open Source