EoCoE-II: Performance Evaluation Workshop

7 oct. 2019, 13:30 → 10 oct. 2019, 14:30 Europe/Paris

Room number 00.325-128 (ground floor) (Erlangen)

First EoCoE-II Evaluation Performance Workshop

Dates: 7th – 10th October 2019

Location: Erlangen, Germany

Maximum number of participants: 16

Description:

The focus of this workshop is performance engineering. Performance engineering is more than employing tools to identify hotspots and bottlenecks. It is about developing a thorough understanding of the interactions between software and hardware. In the first part of the workshop we deal with the core, socket, and node level, where the code gets executed that does the actual computational work. Once the architectural requirements of a code are understood and correlated with performance measurements, the potential benefit of optimizations can often be predicted. We introduce a “holistic” node-level performance engineering strategy centered around the roofline performance model and apply it to different algorithms from computational science. The second part of the workshop (kindly provided in collaboration with the POP project) deals with identifying parallelization and efficiency issues beyond the node level. A set of metrics is introduced which allows the developer to assess quickly the behavior of their code in view of parallelism, and develop appropriate optimization strategies. Attendees will have the opportunity to work with their own codes while being guided by performance experts.

Accommodation:

The local organizers will take care of booking your room. If for some reason you prefer to book your room by yourself, please inform the organizers via the registration page or by email.

Organization committee:

• Georg Hager (FriedrichAlexander-Universität Erlangen-Nürnberg)
• Gerhard Wellein (FriedrichAlexander-Universität Erlangen-Nürnberg)
• Judit Gimenez ‎(Barcelone Supercomputing Center)
• Brian Wylie ‎(Forschungszentrum Jülich)
• Mathieu Lobet (Maison de la Simulation, CEA)

Social event on Tuesday October 8:

Mein lieber Schwan
Hauptstrasse 110
91054 Erlangen

GPS: 49.6027046N,11.0040878E
https://goo.gl/maps/xbQyF95fAACywBiCA

Organisation and Information contact:

• georg.hager@fau.de
• Mathieu.lobet@cea.fr

lundi 7 octobre

1 Welcome – Intro – Computer architecture

Orateur: Dr Georg Hager

2 Tools: topology, affinity, clock speed

Orateur: Dr Georg Hager (FAU)

15:20 Break

3 Microbenchmarking for architectural exploration

Orateur: Dr Georg Hager (FAU)

4 Hands-On: Logging in, starting a job, running

Orateur: Dr Georg Hager (FAU)

mardi 8 octobre

5 The Roofline performance model: basics

Orateur: Dr Georg Hager (FAU)

6 Tools: hardware performance counters and likwid-perfctr

Orateur: Dr Georg Hager (FAU)

10:30 Break

7 Hands-On: STREAM and dense MVM analysis with likwid-perfctr, validating the Roofline model

Orateur: Dr Georg Hager (FAU)

8 SIMD vectorization

Orateur: Dr Georg Hager (FAU)

9 ccNUMA and parallel first touch

Orateur: Dr Georg Hager (FAU)

10 Roofline case study: Stencils

Orateur: Dr Georg Hager (FAU)

15:30 Break

11 Hands-On: A preconditioned CG solver: Analysis, Roofline model, model validation

Orateur: Dr Georg Hager (FAU)

12 Social dinner

GPS: 49.6027046N,11.0040878E
https://goo.gl/maps/xbQyF95fAACywBiCA

mercredi 9 octobre

13 POP methodology

Short introduction to BSC tools
Hands-on: Collecting traces of your own code

Orateur: Dr Judit Gimenez (BSC)

14 Hands-on: Examples of code analysis

Demo: How to do a preliminary analysis
Hands-on: Analyzing your own code

Orateur: Dr Judit Gimenez (BSC)

jeudi 10 octobre

15 Roofline case study: sparse matrix-vector multiplication

Orateur: Dr Georg Hager (FAU)

16 Hands-On: Participants working on their own code

Orateur: Dr Georg Hager (FAU)