This whole-day tutorial will give you an overview on OpenACC. First, we will introduce the hardware architecture of Nvidia GPUs and explain very briefly how a usual CUDA program will look like. Then, we will dive into OpenACC, learn about its possibilities to accelerate code regions and give an outlook to the OpenMP 4.0 standard (which might comprise directives for accelerators). We will have both presentations and prepared hands-on sessions. In a case study, you will learn about OpenACC's current performance and its programming productivity.

You will also get to know the RWTH Aachen GPU Cluster environment on which you will do the hands-on sessions. All hands-on session are provided under Linux.

OpenACC topics covered (amongst others):

• Offloading loops
• Managing data movement between host and device
• Tuning data movement and accesses
• Loop scheduling
• Multiple GPUs
• Interoperability with CUDA libraries

Please register here for Part I (Introduction to OpenACC) of the OpenACC workshop.
During your registration, please indicate whether you plan to take part at the social event on Thursday, October 11th, 7 pm in the "remarks" field.

This whole day is dedicated to accelerate your own code with OpenACC on Nvidia GPUs. Please bring your own C or Fortran code to the workshop (we will not provide any prepared hands-on sessions!). Our team members and staff from Nvidia will help you to get your code running and tuned on the GPU.

For this second part of the workshop, we also have the RWTH's Linux GPU cluster available for the participants. Therefore, we recommend that you prepare your application in our cluster environment beforehand (to get the most out of the workshop):

• Are all files located in your cluster home directory?
• Does the application compile and run (e.g. in serial) on our cluster? Can you use the PGI Compiler (which will be used on our cluster for OpenACC)?

You can create your own RWTH cluster account depending on your affiliation (more information here). If you cannot get access to our Compute Cluster with a cluster account, do the following:

• If you want to prepare your application beforehand or you have sensitive data, please contact us. Then, we will give you access to the cluster for a limited time period.
• If you want to bring your code on the day of the workshop (using a USB stick or other), you will get a test account for the cluster. Please note that this test account should not contain any sensitive data!

Prerequisites Part II: We assume that you are already familiar with OpenACC (e.g. that you took part in the first part of the workshop).

Please register here for Part II (Bring Your Own Code) of the OpenACC workshop.
During your registration, please indicate whether you plan to take part at the social event on Thursday, October 11th, 7 pm in the "remarks" field and write a few sentences about your code (field of application, programming language, operating system, size, number of needed GPUs).