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Date

Monday 14th - Friday 18th September 2020

Location

The workshop will be held online, using the Zoom platform.

Co-organising Institutions

Goals

This workshop organised by VI-HPS and HLRS as a PRACE training event will:

• give an overview of the VI-HPS programming tools suite
• explain the functionality of individual tools, and how to use them effectively
• offer hands-on experience and expert assistance using the tools

On completion participants should be familiar with common performance analysis and diagnosis techniques and how they can be employed in practice (on a range of HPC systems). Those who prepared their own application test cases will have been coached in the tuning of their measurement and analysis, and provided optimization suggestions.

Programme Overview

Presentations and hands-on sessions are planned on the following topics:

• Setting up, welcome and introduction
• TAU performance system
• MAQAO performance analysis & optimisation
• Score-P instrumentation and measurement
• Scalasca automated trace analysis
• Vampir interactive trace analysis
• Paraver/Extrae/Dimemas trace analysis and performance prediction
• ... and potentially others to be added

A brief overview of the capabilities of these and associated tools is provided in the VI-HPS Tools Guide.

The workshop will be held in English and run from 09:00 to not later than 18:00 each day, with breaks.

Participants are encouraged to prepare their own MPI, OpenMP and hybrid MPI+OpenMP parallel application codes for analysis. Codes using multiple GPUs via OpenACC, OpenCL or CUDA may also be analysed.

Programme in Detail (provisional) - all times given as CEST (UTC+2)

Day 1:	Monday 14 September
09:00	Welcome [Jose Gracia, HLRS] Introduction to Zoom [Björn Dick, HLRS] The AMD EPYC Rome processor Hawk Interconnect Network Introduction [Cédric Valensi, UVSQ] Introduction to VI-HPS & overview of tools Introduction to parallel performance engineering Building and running NPB/BT-MZ on Hawk [Christian Feld, JSC]
10:30	(break)
11:00	MAQAO performance analysis tools [Jäsper Ibnamar & Emmanuel Oseret, UVSQ] MAQAO hands-on exercises (MAQAO quick reference)
12:30	(lunch)
14:00	Hands-on coaching to apply MAQAO to analyze participants' own code(s).
15:30	(break)
16:00	Hands-on coaching to apply MAQAO to analyze participants' own code(s).
17:30	Schedule for remainder of workshop
18:00	(adjourn)
Day 2:	Tuesday 15 September
09:00	Paraver tracing tools suite [Judit Giménez & Germán Llort, BSC] Paraver hands-on exercises
10:30	(break
11:00	Hands-on coaching to apply Paraver tools suite to analyze participants' own code(s).
12:30	(lunch)
14:00	Hands-on coaching to apply Paraver tools suite to analyze participants' own code(s).
15:30	(break)
16:00	TAU performance system [Sameer Shende, UOregon] TAU hands-on exercises
17:30	Schedule for remainder of workshop
18:00	(adjourn)
Day 3:	Wednesday 16 September
09:00	Score-P instrumentation & measurement toolset [Christian Feld, JSC] Score-P analysis scoring & measurement filtering Score-P specialized instrumentation and measurement Score-P hands-on exercises (recording) CUBE profile explorer hands-on exercises [Brian Wylie, JSC] (recording)
10:30	(break
11:00	Hands-on coaching to apply Score-P to analyze participants' own code(s).
12:30	(lunch)
14:00	Hands-on coaching to apply Score-P to analyze participants' own code(s).
15:30	(break)
16:00	Hands-on coaching to apply TAU to analyze participants' own code(s).
17:30	Review of day and schedule for remainder of workshop
18:00	(adjourn)
Day 4:	Thursday 17 September
09:00	Scalasca automated trace analysis [Markus Geimer & Brian Wylie, JSC] Scalasca hands-on exercises (recording)
10:30	(break)
11:00	Vampir interactive trace analysis [Hartmut Mix, TUDresden] Vampir hands-on exercises (Vampir examples) (recording)
12:30	(lunch)
14:00	Hands-on coaching to apply Scalasca/Vampir to analyze participants' own code(s).
15:30	(break)
16:00	Hands-on coaching to apply TAU to analyze participants' own code(s).
17:30	Review of day and schedule for remainder of workshop
18:00	(adjourn)
Day 5:	Friday 18 September
09:00	Hands-on coaching to apply Scalasca/Vampir to analyze participants' own code(s).
10:30	(break
11:00	Hands-on coaching to apply tools to analyze participants' own code(s).
12:30	(lunch)
14:00	Hands-on coaching to apply tools to analyze participants' own code(s).
16:00	Review
16:30	(adjourn)

Hardware and Software Platforms

Hawk: AMD Linux modular cluster system:

• HPE Apollo 9000: 5632 nodes with 2 x AMD EPYC 7742 and 256GB DDR4 @ 3200 GT/s and enhanced hypercube based on Infiniband HDR
• software: RHEL 8 / CentOS 8; HPE MPI (aka "MPT") as well as OpenMPI

The local HPC system Hawk is the primary platform for the workshop and will be used for the hands-on exercises. Course accounts will be provided during the workshop to participants without existing accounts. Other systems where up-to-date versions of the tools are installed can also be used when preferred, though support may be limited and participants are expected to already possess user accounts on non-local systems. Regardless of whichever external systems they intend to use, participants should be familiar with the relevant procedures for compiling and running their parallel applications (via batch queues where appropriate).

Registration

Register via the course website.

Contact

Tuning Workshop Series Cédric Valensi Université de Versailles Saint-Quentin-en-Yvelines Phone: +33 1 77 57 59 36 Email: cedric.valensi[at]uvsq.fr

Local Arrangements Jose Gracia HLRS, Uni Stuttgart Phone: +49 711 685 87208 Email: gracia[at]hlrs.de

Sponsors

This workshop is a PRACE training centre (PTC) event, organised by VI-HPS & HLRS for the Gauss Centre for Supercomputing.