Introduction to OpenMP

A Directive-based API for Parallel Processing on Shared-memory Computers

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Introduction

• What is OpenMP?
• Why OpenMP?
• Methods

Basics

• OpenMP Rules and Conventions
• Parallel and Do Directives
• Parallel Do Directive
• How to Use
• omp_set_num_threads
• omp_get_thread_num

Directives

• master
• single
• critical
• ordered
• threadprivate
• sections
• atomic
• barrier

Clauses

• reduction
• firstprivate
• lastprivate

Library Routines/Functions

• omp_set_dynamic
• omp_get_nested
• locks
• omp_get_max_threads
• omp_get_num_threads
• omp_get_num_procs
• omp_in_parallel

Environment Variables

• OMP_DYNAMIC
• OMP_NESTED
• OMP_SCHEDULE
• OMP_NUM_THREADS