OpenMP Thread Affinity using interposer

I am developing an interposer library for OpenMP thread-affinity so that I do not have to add affinity code in source file. I interpose pthread_create() and set the affinity attribute by calling pthread_attr_setaffinity_np(). OpenMP runtime seems to overwrite/ignore affinity set by attribute. 

OpenMP crash when using Fortran CLASS(*)


I'm seeing a weird crash when using an openmp do loop with a class(*) pointer.  A short test case is attached.  In the test case, if the three lines of the 'select type' statement are included, the code crashes.  If the select type is commented, the code runs.  Interestingly, the code does not even need to execute the select type statement for the crash to happen as I have a 'cycle' statement at the start of the loop. 

I can't see anything apparently wrong with the code.  Is this a possible openmp and/or fortran bug or am I violating something in the openmp standard?

Design of OpenMP Runtime Library, implementation of tasks

Dear all,

I'm looking for documents that could possibly shed some light onto the general design of the Intel OpenMP Runtime Library and on the implementation of tasks in particular. I have seen the offcial documentation that comes with the source code, but it is not very extensive. Any hints and singposts into the right directions would be most welcome. Thank you very much.

Best wishes,
Maxim A.

Multithreaded Code Optimization in PARSEC* 3.0: BlackScholes

The Black-Scholes benchmark is a one of the 13 benchmarks in the PARSEC. This benchmark does option pricing with Black-Scholes Partial Differential Equation (PDE). The Black-Scholes equation is a differential equation that describes how, under a certain set of assumptions, the value of an option changes as the price of the underlying asset changes. Based on this formula, one can compute the option price analytically based on the five input parameters. Using this analytical approach to price option, the limiting factor lies with the amount of floating-point calculation a processor can perform.
  • Linux*
  • Сервер
  • C/C++
  • Intel® VTune™ Amplifier
  • Библиотека Intel® Math Kernel Library
  • Black-Scholes
  • Intel® Xeon® Processor
  • OpenMP*
  • Заработок с помощью программного кода
  • Отрасль финансовых услуг
  • Параллельные вычисления
  • 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 2016 Composer Edition Update 1.

    New Features

    • Added dynamic/hinted lock implementation that supports OpenMP* locks with hints
    • Disabled monitor thread when KMP_BLOCKTIME=infinite
    • Improved stack protection with safe C library for string/memory operations

    Bug Fixes

    Подписаться на OpenMP*