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OpenMP slower than no OpenMP

Here is a Friday post that has a sufficient lack of information that will probably be impossible to answer.  I have some older Fortran code I'm trying to improve the performance of.

Authored by joe Last updated on 09/28/2018 - 14:18
Forum topic

OpenMP and MKL

Hello,

I have a program where at one point I call a function.

Authored by Gordon F. Last updated on 06/24/2016 - 12:29
Forum topic

MPI/openMP segmentation error

Hello,

when I run my program on two nodes, and set the number of threads larger than 1 (i.e., 2-16 threads), I've encountered the segmentation error:

Authored by Last updated on 02/16/2017 - 19:44
Article

Beginning Hybrid MPI/OpenMP Development

A guide for getting started combining MPI and OpenMP in one program. Code samples are included.
Authored by James T. (Intel) Last updated on 08/02/2018 - 06:21
Blog post

Hybrid MPI and OpenMP* Model

In the High Performance Computing (HPC) area, parallel computing techniques such as MPI, OpenMP*, one-sided communications, shmem, and Fortran coarray are widely utilized. This blog is part of a series that will introduce the use of these techniques, especially how to use them on the Intel® Xeon Phi™ coprocessor. This first blog discusses the main usage of the hybrid MPI/OpenMP model.
Authored by Nguyen, Loc Q (Intel) Last updated on 12/12/2018 - 18:00
Forum topic

MPI openmp fopenmp oopenmp qopenmp

On Linux, using Eclipse, I am creating a C project that uses a combination of MPI and OpenMP.

Authored by jimdempseyatthecove (Blackbelt) Last updated on 06/14/2016 - 08:32
Forum topic

OpenMP problem with Threads Number

Hi,

Authored by Last updated on 05/01/2018 - 21:44
Article

Hybrid applications: Intel MPI Library and OpenMP*

Tips and tricks on how to get the optimal performance settings for your mixed Intel MPI/OpenMP applications.
Authored by Gergana S. (Blackbelt) Last updated on 12/12/2018 - 18:08
Forum topic

how to run the hybrid MPI/OpenMP

Hi, Dear Sir or Madam,

Authored by dingjun.chencmgl.ca Last updated on 01/07/2015 - 15:21
Forum topic

Stack Overflow because of OpenMP on Windows

Hi,

Authored by Last updated on 05/05/2016 - 06:38