AMD Induction Training (AIT)

13th October 2021 (Registration is closed)


This is a hands on workshop where participants will use code snippets to illustrate the best approach to accessing the power of  our new AMD ROME CPUs.

The workshop will cover:

  • The ROME Microarchitecture & Memory channels
  • Compilation, & optimization
  • Numa regions & Pinning
  • Maths and Scientific Libraries
  • uProf a new profiler


The virtual workshop will be run on multiple DiRAC sites so you will be able to experience exactly what you need to do on the system you use.

  • Support will be there from AMD and the local technical support teams.
  • A shared slack channel will be available to ask questions, highlight any issues and share good practice between sites.

Target Audience

The target audience is researchers:

  • Who are interested in building and running their code on our new DiRAC-3 AMD systems.
  • Who want to run their code efficiently to get the best performance.
  • Who want to take advantage of the new AMD features and tools.


Only basic experience of a language is required C/C++, Fortran, or Python.


Closing date is the 6th of October. Now closed

N Ways to GPU Programming

30th Sep 2021, full day course, TBA

Learning Objectives

With the release of NVIDIA CUDA in 2007, different approaches to GPU programming have evolved. Each approach has its own advantages and disadvantages. By the end of this bootcamp session, participants will have a broader perspective on GPU programming approaches to help them select a programming model that better fits their application’s needs and constraints. The bootcamp will teach how to accelerate a real-world scientific application using the following methods:

  • Standard: C++ stdpar, Fortran Do-Concurrent
  • Directives: OpenACC, OpenMP
  • Programming Language Extension: CUDA C, CUDA Fortran.

Bootcamp Outline

During this lab, we will be working on porting mini applications in Molecular Simulation (MD) domain to GPUs. You can choose to work with either version of this application.

Bootcamp Duration

The lab material will be presented in an 8-hour session. A Link to the material is available for download at the end of the lab.

Content Level

Beginner, Intermediate

Target Audience and Prerequisites

The target audience for this lab are researchers/graduate students and developers who are interested in learning about various ways of GPU programming to accelerate their scientific applications.

Basic experience with C/C++ or Fortran programming is needed. No GPU programming knowledge is required.


Registration is closed.

EPFL OpenACC Bootcamp


Learn how to write a portable parallel program that can run on multicore CPUs and accelerators like GPUs and how to apply incremental parallelization strategies using the OpenACC programming model to accelerate an example application that simulates heat distribution across a 2-dimensional metal plate and applying this knowledge to accelerate a mini-application.

Event Format 

The GPU Bootcamp will be hosted online in the Central European Summer Time zone. All communication will be done through Zoom, Slack and email. 


Basic experience with C/C++ or Fortran. No GPU programming knowledge is required.

This event has limited capacity, so please make sure that prerequisites are met before applying. You will be receiving an acceptance email with details on how to participate by September 2nd, 2021.  

Compute Resources

Attendees will be given access to a GPU cluster for the duration of the GPU Bootcamp.


Day 1: September 9, 2021 (9:00 AM to 5:00 PM CEST)

  • Welcome: 9:00 AM 
  • Connecting to a cluster:  9:00 AM – 09:15 AM 
  • Introduction to GPU programming: 9:15 AM – 9:30 AM CAT(Lecture)
    • What is a GPU and Why Should You care?
    • What is GPU Programming?
    • Available Libraries, Programming Models, Platforms.
  • Introduction to OpenACC: 9:15 AM – 10:00 AM (Lecture + Lab)
    • What is OpenACC and Why Should You Care?
    • Profile-driven Development.
    • First Steps with OpenACC.
    • Lab 1.
  • OpenACC Data Management: 10:00 AM – 10:45 AM (Lecture + Lab) 
    • CPU and GPU Memories.
    • CUDA Unified (Managed) Memory.
    • OpenACC Data Management.
    • Lab 2.
  • Break 11:00-11:15
  • Gangs, Workers, and Vectors Demystified: 11:30 AM – 12:15 PM (Lecture + Lab)
    • GPU Profiling.
    • Loop Optimizations.
    • Lab 3.
  • Mini-application challenge (12:15-12:30)
    • Overview of the mini-application 
    • Review steps to acceleration 
  • Application challenge  (13:00-17:30)

Day 2: September 10, 2021  (9:00 AM to 12:30 PM CEST)

Welcome (Moderator): 9:00

Mini-application Solution Walk-through (9:15-9:30)

Introduction to NVIDIA ® Nsight™ Tools (9:30-10:00)

  • Overview of Nsight Tools
  • How to profile a serial application with NVIDIA Tools Extension (NVTX) 
  • Overview of optimization cycle with Nsight Systems

Profiling mini-application (10:00-12:30)

  • Profile a sequential weather modeling application (integrated with NVTX APIs) with NVIDIA Nsight Systems to capture and trace CPU events and time ranges
  • Understand how to use NVIDIA Nsight Systems profiler’s report to detect hotspots and apply OpenACC compute constructs to the serial application to parallelise it on the GPU
  • Learn how to use Nsight Systems to identify issues such as underutilized GPU device and unnecessary data movements in the application and to apply optimization strategies steps by steps to expose more parallelism and utilize computer’s CPU and GPU

Wrap-up (12:25-12:30)

Director’s Time

Call for DiRAC Director’s Discretionary proposals

Application deadline 23rd November 2020.

The DiRAC Director will make a number of large discretionary awards of time on two DiRAC services during the period 1st December 2020 – 31st March 2021. In total, approximately 32m core hours are available in this call.

In addition, Research Software Engineering (RSE) projects of up to 3 months’ duration will be considered.

Scope of call:

DiRAC will be able to make a number of large discretionary awards of time on two of our services during the period August 2020-March 2021. Proposals should be ambitious in scope – these awards will be made to proposals of outstanding scientific interest and timeliness and which can demonstrate significant benefit from concurrent access to large numbers of nodes.

All codes used must have undergone a technical review as part of the RAC process. Codes which have not done cannot be considered in this call.

All awarded time must be used by March 31st 2021 and no requests to extend beyond this date will be accepted.

Application process:

Proposals should be submitted using the Discretionary Call application form or the RSE Support application form. The forms are available below:

You must include the application number where the required technical case associated with the software to be used in this application can be obtained. You do not need to resubmit technical information that you have already provided however, you may be asked to provide evidence of the scalability of your codes if you will be using the code at a larger scale than was previously requested.

Assessment process:

Proposals will be reviewed by the Director, the RAC chairs and members of the RAC panels.

Assessment criteria:

Proposals will be assessed according the following criteria:

    1. Scientific impact – 60%
    2. Track record of user/group – 20%
    3. Timeliness/urgency – 20%

Closing date:

Applications should be submitted by e-mail to by 5pm on Monday, 23rd November 2020.

Seedcorn Time

Access to DiRAC is co-ordinated by The STFC’s DiRAC Resource Allocation Committee, which puts out an annual Call for Proposals to request time for a Full Project Allocation and also operates a Seedcorn Time programme.

Seedcorn Time Programme

For researchers who would like to try the DiRAC resources, get a feel for HPC, test codes, benchmark or see what the DiRAC resources can do for you before making a full application for resources, an application can be made for seedcorn time.

Existing users may also apply for seedcorn allocations to enable code development/testing on a service which is not currently part of their project allocation.

You can apply for seedcorn time at any time.

Seedcorn Application

The maximum allocation of seedcorn time will be 100,000 x86 core hours or 1,000 GPU hours or 1,000 KNL node hours. Your hours can be used at any time within three months from the date it is allocated. If you require a larger seedcorn allocation in order to carry out the necessary testing of your code, please contact the DiRAC Director to discuss your requirements.

An overview of the DiRAC hardware resources can be found here.

If you would like to apply please fill in this simple DiRAC Seedcorn application form and send it to

You will need to provide your personal details, the codes that you intend to run and what libraries and tools are required for you to run the code, if known. We also would like to know what you intend to achieve with your allocation and of course which of the four DiRAC systems you would like to use.

You should be able to complete the form in around 15 minutes.

The decision process for Seedcorn applications is streamlined and should take no more that 1 week.

Research Symposium

SuperComputing Wales Research Symposium 2018
13th September
Swansea University

The Swansea Academy of Advanced Computing (SA2C) are hosting this event to bring together the Supercomputing Wales community and give users a forum to showcase their research to the wider HPC community and network with other supercomputing specialists.

Whilst primarily aimed at the Swansea community, this event is open to all DiRAC HPC users who would like to present their research. The event will include research talks, a poster session, and opportunities for discussion about HPC, the Supercomputing Wales project and their SUNBIRD machine.

SAC2 facilitates Swansea researchers in using HPC technologies by enabling access to a HPC computing platform and Research Software Engineers (RSEs) to assist in its use. These resources are funded via the Supercomputing Wales project (SCW).

Registration for this event is via Eventbrite and can be accessed here. The Eventbrite page also has a Preliminary Agenda for the day, which will be updated closer to the event. Accomodation booking on the University Campus is available through Swansea’s DiRAC Day website.

Data Privacy

Data Privacy at DiRAC

At DiRAC we are completely committed to respecting and protecting your data whilst it is in our care. We have strict procedures in place to protect your personal data when you give it to us and we store all your data on UK-based secure servers.

What information do we collect?

You provide some of the information yourself – to register for a training account and the Essentials Level test you need to give us your personal contact details:

  • name;
  • email address;
  • afflilitation.

We collect some information automatically:

  • technical information, like the Internet Protocol (IP) address used to connect your computer to the internet and your unique identifier;
  • information about your visit, including the URL clickstream to, through and from our training site, pages you viewed and length of visits to certain pages.

What do we do with your information?

We use the information you provide to improve the DiRAC training experience for you and for everyone. That includes:

  • notifying you about things you have asked as about, such as internal or external training opportunities and events that might be useful to you;
  • notifying you of test results;
  • getting in touch if we need to tell you about something, like a change to our policies;
  • using the technical information about your visit to iterate and adjust our training offering (by looking at things like which pages are most popular compared to those which receive very little traffic etc.)

Information we receive that is not classified as personal data, such as that from the survey at the end of the Essentials Level Test is shared only internally with our small training team and used solely to improve our training offering. Any personal information that could identify you is removed or changed before any analysis is carried out.

Do we share your information with other organisations?

  • we only use your information to improve your experience. We do not share your information with any external organisations unless you give us your permission to share it, for example, with other training organisations or HPC-Special Interest Groups.

In exceptional circumstances, we might share your information without your permission if we reasonably believe you might be breaking the law, for example using hate speech on one of our forums, and such disclosure is allowed under the relevant laws, including the data protection law.

How long do we keep your information?

  • we will only hold your personal contact information for a period of three years from the date you give it to us, for example when you register for either a training account or for the Essentials Level test. While your information is with us, it is stored on UK-based secure servers;
  • we may close your account if you havnt used it in a long time. We’ll always send you an email to tell you that we plan to do this before we delete anything.

You will always be asked to consent to us storing your data, and you can withdraw that consent, or request that your data is deleted at any time by emailing DiRAC Support.

Keep your login credentials secure. If you have any reason to suspect these have been compromised, you should either Contact Us or change them immediately.