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aiXcelerate 2012 - Tuning for bigSMP HPC Workshop


Aixcelerate

Erweiterungsbau

Monday, Oct 8 - Wednesday, Oct 10, 2012

Center for Computing and Communication

RWTH Aachen Unversity

 

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bull logo ScaleMP Logo Intelsponsored by:  logo hointel

   

 

 

Introduction

The number of cores per processor chip is still increasing. In order to be prepared to program and use future computing systems efficiently, we provide a large number of "fat" compute nodes as part of the RWTH Compute-Cluster. These nodes are equipped with 16 eight-core Intel® Xeon™ processors each and they provide a large shared memory of up to 2 TB, which offers additional opportunities.

Furthermore, we operate a ScaleMP-Cluster, consisting of 16 nodes with 4 eight-core Intel® Xeon™ processors each and 4 TB of accumulated main memory. These nodes are coherently coupled with an innovative software solution provided by the company ScaleMP which creates a virtual shared memory over all nodes running a single Linux operating system.

The efficient use of these systems requires a sensible way of NUMA-aware programming.

While message passing with MPI is the dominating paradigm for parallel programming in the domain of high performance computing (HPC), with the growing number of cores per cluster node the combination of MPI with shared memory programming is gaining importance. In order to exploit different levels of parallelism, namely through shared memory programming within a node and message passing across the nodes, good performance becomes increasingly difficult to obtain.

This tuning workshop will cover tools and methods to program big SMP systems in detail.

 

Participants

Attendees are kindly requested to prepare and bring in their own code, if applicable. It is recommended to have good knowledge in MPI and/or OpenMP and the programming language (C/C++/Fortran) of the code. If you do not have an own code, but you are interested in the presented topics, you can work on prepared exercises during the lab time.
The machines are all operated under Linux, so all codes need to run there.
Participants from RWTH Aachen university are welcome, but also participants from other universities or industrie companies.
The presentations will be given in English.
 

Bring in your own code

We have tuning experts from Intel, Bull, ScaleMP and from the HPC Team of the computing center available. If you have a code that you want to tune for our machines, this is a good opportunity to get help in doing so. Instead of doing exercises during the lab sessions you can try the presented tools and techniques on your application. To make things run as smoothly as possible, you should make sure that your application and input data fulfills the following requirements:
- The application must run on our Linux cluster.
- It is a plus for some of the presented tools, if the Intel Compiler is used to compile the application.
- A test run with a representative dataset should finish in a few minutes, so that some test runs can be made during the workshop.
- The source code must be available and you should be familiar with the build system of your application.
 
If you have an application that does not fulfill these requirements and you like to tune it during the workshop, please contact us in advance. We will then try to help you in porting your application and preparing it for the workshop.
 

Registration

There is no workshop fee, but the number of seats in our seminar room is limited. So, please register on the link below. If you like to bring in your own code, please make a short note under “remarks”. This helps us to better prepare the courses and lab sessions. There will be a sponsored social dinner on Tuesday, here we also need to know how many people will attend. Please add a node “I will attend the social dinner.” or “I will not attend the social dinner.” under “remarks” as well.

Please register here.

Presenters

We are happy to announce, that some of the presentations are held by the following guest speakers:

Michael Klemm (Intel)

Nir Paikowsky (ScaleMP)

Denis Gutfreund (Bull)

 

Agenda

Please find a preliminary agende below or as a pdf document here.

Monday, 8.10

OpenMP Programming:

(11:00 – 12:30 Review of OpenMP Basics)
14:00 – 14:30 Welcome and Introduction
14:30 – 15:30 NUMA aware programming with OpenMP
15:30 – 16:00 Coffee Break
16:00 – 16:45 Tasks on NUMA architectures / Outlook on OpenMP 4.0
16:45 – 17:30 Lab Time: Bring in your own code or work on exercises
 

Tuesday, 9.10

Introduction of our machines and tools to use them:

09:00 – 10:00 The Bull BCS Systems
10:00 – 10:30 Using the Intel Compiler
10:30 – 11:00 Coffee Break
11:00 – 11:45 Intel VTune
11:45 – 12:30 Lab Time: Bring in your own code or work on exercises
12:30 – 14:00 Lunch Break
14:00 – 14:30 vSMP Foundation introduction and architecture
14:30 – 15:00 Success stories and ‘real-life’ examples
15:00 – 15:30 Introduction to ScaleMP's Developer Productivity Tools
15:30 – 16:00 Coffee Break
16:00 – 17:30 Lab Time: Bring in your own code or work on exercises
19:00 – 22:00 Sponsored Social Dinner

 

Wednesday, 10.10

Hybrid Programming:

09:00 – 09:30 Introduction to Hybrid Programming
09:30 – 10:00 Tuning for OpenMPI
10:00 – 10:30 Tuning for Intel MPI
10:30 – 11:00 Coffee Break
11:00 – 12:00 Performance Tools for Hybrid Programs
12:00 – 12:30 Lab Time: Bring in your own code or work on exercises
12:30 – 14:00 Lunch Break
14:00 – 15:30 Lab Time: Bring in your own code or work on exercises
15:30 – 16:00 Coffee Break
16:00 – 17:30 Lab Time: Bring in your own code or work on exercises
 

Course Material

The course material can be found here.

 

Links to previous events

 

Social event

The social event is sponsored by h.o.-Computer Software GmbH and Intel. The dinner takes place in the Magellan restaurant.

Pontstraße 78

52062 Aachen


Get a map of the route here.

 

 

 

Feedback

After the event we will ask you to provide your feedback. You will find a link to the web form here.

 

Travel Information

If required, please make your own hotel reservation.You can find some popular hotels listed here. You may find a complete list of hotels on the web pages of the Aachen Tourist Service. We recommend that you try to book a room in the "Novotel Aachen City", " Mercure am Graben" or "Aachen Best Western Regence" hotels. These are adequate hotels with reasonable prices at a walking distance (20-30 minutes) to the computer center through the old city of Aachen. An alternative is the hotel "IBIS Aachen Marschiertor" which is close to the main station, which is convenient if you are travelling by train and also want to commute to the Center by train (3 trains per hour, 2 stops)

Please, download a sketch of the city (pdf, 415 KB) with some points of interest marked.
You may find a description of how to reach us by plane, train or car here.
Bus route 33 connects the city and the stop "Mies-van-der-Rohe-Straße" every 15 minutes.
Trains between Aachen and Düsseldorf stop at "Aachen West" station which is a 5 minutes walk away from the center.
From the bus stop and the train station just walk uphill the "Seffenter Weg". The first buildung on the lefthand side at the junction with "Kopernikusstraße" is the Computing Center.
The weather in Aachen is usually unpredictable. It is always a good idea to carry an umbrella. If you'll bring one, it might be sunny!
 

Contact

 

 

Abschlußinformationen