Table of Contents

OpenMP

Actually in use

* OpenMP v3.1 (Feb. 2011) implemented in GCC 4.7 (Aug. 2011) * OpenMP v3.0 (May 2008) implemented in GCC 4.4 (June 2008) * OpenMP v2.5 implemented in GCC 4.2 (March 2006)

Future versions

* OpenMP v4.0 (Oct. 2013) implemented in GCC 4.9rc

Requirements

Ubuntu 12.04 GCC 4.6 with OpenMP v3.0 - necessary Package libgomp1

Examples and Tutorials for GCC

OpenMP Wiki 

const int N = 1000000; 
double A[N], B[N], C[N]; /* Initialisierung von A, B und C */ 
 
#pragma omp parallel for 
for (int i = 0; i < N; i++) {
     A[i] = B[i] + C[i]; 
}

Optimization

Optimize the environment for your OpenMP code.

OpenMP 4.0 and OpenACC offloading support in GCC

GCC 5.0 with libgomp

Manual

OpenMP 4.0 with OpenACC only works for NVIDIA NVPTX and Intel Xeon Phi targets