OpenMP in Small Bites/Overview

This video provides a brief history of OpenMP and then introduces the parallel region, one of the most fundamental concepts of OpenMP, used to mark code regions that are meant to be processed by multiple threads in parallel. How the code region is processed and by which threads is then controlled by other OpenMP constructs introduced in the part on Worksharing.

Video

( Slides as pdf)

Quiz

1. Out of which three components the OpenMP interface consists?

	Compiler directives, runtime routines, environment variables
	Compiler directives, host language extensions, runtime routines
	Host language extensions, runtime routines, environment variables.

2. What is one of the key concepts of the OpenMP execution model?

	Fork-Join
	Create-Release
	Start-Wait

3. How can you control the number of threads?

	Set environment variable OMP_NUM_THREADS.
	Use num_threads clause on a parallel construct.
	Number of threads are fixed at compile time
	All of the above