Fundamentals of Accelerated Computing with OpenACC
(Open ACC를 활용한 가속 컴퓨팅의 기초)
1day 8hous
Tools, libraries, and frameworks
NVIDIA® Nsight™, OpenACC
  • This workshop covers the fundamental tools and techniques needed for accelerating C/C++ or Fortran applications to run on massively parallel GPUs with OpenACC. You will learn how to write code, configure code parallelization with OpenACC, optimize memory movements between the CPU and GPU accelerator, and implement the workflow that you have learned on a new task—accelerating a fully functional, but CPU-only, Laplace Heat Equation code for massive performance gains. At the end of the workshop, you will have access to additional resources for creating new GPU-accelerated applications on your own.
  • >

    Basic C/C++ or Fortran competency, including familiarity with variable types, loops, conditional statements, functions, and array manipulations.

  • >

    No previous knowledge of GPU programming is assumed.

Upon successful completion of the assessment, participants will receive an NVIDIA DLI certificate to recognize their subject matter competency and support professional career growth.
Hardware Requirements
You’ll need a desktop or laptop computer capable of running the latest version of Chrome or Firefox. You’ll be provided with dedicated access to a fully configured, GPU-accelerated workstation in the cloud.
Learning Objectives

By participating in this workshop, you’ll have an understanding of the fundamental tools and techniques
for GPU-accelerating C/C++ or Fortran applications with OpenACC and be able to:

  • 01

    Profile and optimize your CPU-only applications to identify hot spots for acceleration.
  • 02

    Use OpenACC directives to GPU-accelerate your codebase.
  • 03

    Optimize data movement between the CPU and GPU accelerator.
Workshop Outline
Introduction (15 mins) · Meet the instructor
· Create an account at
Introduction to Parallel
(50 mins)
Learn about parallelism in a conceptual way, as well as how to express it with OpenACC. Topics that will be covered are as follows:
· Introduction to parallelism
· The goals of OpenACC
· Basic parallelization of code using OpenACC
Break (10 mins)
Profiling with OpenACC
(50 mins)
Learn how to build and compile an OpenACC code, the importance of profiling, and how to use the NVIDIA Nsight™ Systems profiler. Topics that will be covered are as follows:
· Compiling sequential and OpenACC code
· The importance of code profiling
· Profiling sequential and OpenACC multicore code
· Technical introduction to the code used in introductory modules
Break (45 mins)
Introduction to
OpenACC Directives
(50 mins)
Learn about the differences between GPUs and multicore CPUs, and manage memory with CUDA Unified Memory. Topics that will be covered are as follows:
· Definition of a GPU
· Basic OpenACC data management
· CUDA Unified Memory
· Profiling GPU applications
Break (10 mins)
Loop Optimizations
with OpenACC (50 mins)
Understand the various levels of parallelism on a GPU and learn ways to extract more parallelism with OpenACC by optimizing loops in your code. Topics that will be covered are as follows:
· Seq/Auto clause
· Independent clause
· Reduction clause
· Collapse clause
· Tile clause
· Gang, Worker, Vector
Break (10 mins)
Final Review
(60 mins)
· Review key learnings and answer questions.
· Complete the assessment and earn a certificate.
· Complete the workshop survey.