Virtual Institute – High Productivity Supercomputing

21st VI-HPS Tuning Workshop (LRZ, Garching, Germany)

Date

Monday 18th - Friday 22nd April 2016.

Location

The workshop will take place at LRZ, Leibniz Supercomputing Centre on the university campus Garching-bei-München, Germany.

Organizing Institutions

LRZ PRACE

Goals

This workshop organized by VI-HPS for the German PRACE Advanced Training Centre hosted by LRZ 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

Programme Overview

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

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 for lunch and refreshments. For participants from public research institutions in PRACE countries, the course fee is sponsored through the PRACE PATC program. All participants are responsible for their own travel and accommodation.

A social event for participant and instructor networking took place in the evening of Tuesday 19 April, consisting of a guided tour of the Weihenstephan Brewery followed by a self-paid dinner at the brewery restaurant.

TW21@LRZ social event

Classroom capacity is limited, therefore priority will be given to applicants with parallel codes already running on the workshop computer system (SuperMUC UV2), and those bringing codes from similar x86 cluster systems to work on. Participants are therefore encouraged to prepare their own MPI, OpenMP and hybrid MPI+OpenMP parallel application codes for analysis.

Programme in Detail

Day 1: Monday 18 April
08:30 (registration & set-up of course accounts on workshop computers)
09:00 Welcome
  • Introduction to VI-HPS & overview of tools [Michael Gerndt, TUM]
  • SGI UV2 computer system and software environment [LRZ]
  • Building and running NPB-MZ-MPI on SGI UV2 [Christian Feld, JSC]
  • Introduction to parallel performance engineering [Michael Gerndt, TUM]
  • 10:30 (break)
    11:00 MAQAO performance analysis tools [Cédric Valensi, Emmanuel Oseret & Jean-Baptiste Le Reste, UVSQ]
  • MAQAO hands-on exercises (MAQAO quick reference)
  • 12:30 (lunch)
    13:30 Hands-on coaching to apply tools to analyze participants' own code(s).
    17:30 Review of day and schedule for remainder of workshop
    18:00 (adjourn)

    Day 2: Tuesday 19 April
    09:00 Allinea performance tools suite [Florent Lebeau, Allinea]
  • Allinea hands-on exercises
  • 10:30 (break)
    11:00 O|SS & mpiP performance analysis tools [Martin Schulz, LLNL]
  • O|SS & mpiP hands-on exercises
  • 12:30 (lunch)
    13:30 Hands-on coaching to apply tools to analyze participants' own code(s).
    17:30 Review of day and schedule for remainder of workshop
    18:00 (adjourn)
    19:30 Social event: Guided tour of Weihenstephan Brewery and dinner

    Day 3: Wednesday 20 April
    09:00 Score-P instrumentation & measurement toolset [C. Feld & B. Wesarg]
  • Score-P hands-on exercises
  • CUBE profile explorer hands-on exercises [Christian Feld, JSC]
  • 10:30 (break)
    11:00 Score-P analysis scoring & measurement filtering  [C. Feld & B. Wesarg]
  • Measuring hardware counters and other metrics 
  • Extra-P automated performance modeling [Sergei Shudler, TUDarmstadt]
  • Extra-P hands-on exercises
  • 12:30 (lunch)
    13:30 Hands-on coaching to apply tools to analyze participants' own code(s).
    17:30 Review of day and schedule for remainder of workshop
    18:00 (adjourn)

    Day 4: Thursday 21 April
    09:00 Scalasca automated trace analysis [Christian Feld, JSC]
  • Scalasca hands-on exercises
  • Vampir interactive trace analysis [Bert Wesarg & Johannes Ziegenbalg, TUD]
  • Vampir hands-on exercises
  • 10:30 (break)
    11:00 Paraver tracing tools suite [Judit Giménez & Germán Llort, BSC]
  • Paraver hands-on exercises
  • 12:30 (lunch)
    13:30 Hands-on coaching to apply tools to analyze participants' own code(s).
    17:30 Review of day and schedule for remainder of workshop
    18:00 (adjourn)

    Day 5: Friday 22 April
    09:00 Kcachegrind [Josef Weidendorfer, TUM]
  • Kcachegrind hands-on exercises
  • Periscope Tuning Framework [Michael Firbach, TUM]
  • Periscope hands-on exercises
  • 10:30 (break)
    11:00 MUST MPI runtime error detection [Joachim Protze, RWTH]
  • MUST hands-on exercises
  • ARCHER OpenMP runtime error detection [Joachim Protze, RWTH]
  • ARCHER hands-on exercises
  • STAT parallel stack trace analysis [Martin Schulz, LLNL]
  • STAT hands-on exercises
  • 12:30 (lunch)
    13:30 Review [Michael Gerndt, TUM]
    Hands-on coaching to apply tools to analyze participants' own code(s).
    17:00 (adjourn)
     

    Hardware and Software Platforms

    UV2: SGI UltraViolet2

    • 2 compute nodes each with 48 Intel Xeon E7-4870 'Westmere-EX' processors (2.4GHz, 10 cores per processor, 2 hardware threads per core) and 3TB shared memory
    • network: NUMAlink InfiniBand-based shared-memory interconnect
    • parallel filesystem: GPFS
    • software: SLES 11, SGI MPT MPI, Intel & GCC compilers, SLURM batchsystem (interactive use expected during workshop)

    SuperMUC#2: x86 Linux cluster system:

    • 3072 compute nodes each with two Intel Xeon E5-2697v3 'Haswell' processors (2.6GHz, 14 cores per processor, 2 hardware threads per core) and 64GB shared memory
    • network: FDR14 Infiniband non-blocking tree interconnect
    • parallel filesystem: GPFS (SCRATCH & WORK)
    • software: SLES-based GNU/Linux, IBM & Intel MPI; Intel, GCC and other compilers; Loadleveler batchsystem

    The local HPC system SuperMUC UV2 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. Unfortunately, SuperMUC will be unavailable due to essential maintenance. Regardless of whichever 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 PRACE training portal: the number of participants is limited and selection made based on the information provided when registering.

    The workshop will be held in Leibniz Rechenzentrum on the university campus outside Garching bei München, approximately 25 min north from the city centre of Munich. The U-bahn line U6 (station: Garching-Forschungszentrum) provides direct connection from the campus area to both Munich and Garching.
    Getting to/from LRZ

    A block of rooms have been reserved until 17 March 2016 with the code "VIHPS" at the Hotel Hoyacker Hof in Garching. It is recommended to choose a hotel in Garching or Munich city centre and use the U-bahn to reach LRZ.
    Accommodation in Garching
    Accommodation in Munich

    Contact

    Tuning Workshop Series

    Brian Wylie
    Jülich Supercomputing Centre
    Forschungszentrum Jülich GmbH
    Phone: +49 2461 61-6589
    Email: b.wylie[at]fz-juelich.de
       

    Local Arrangements

    Anupam Karmakar & Volker Weinberg
    Leibniz Supercomputing Centre
    Garching-bei-München
    Phone: +49 89 35831 8861 & 8863
    Email: karmakar[at]lrz.de & weinberg[at]lrz.de

    Sponsors

    PRACE This workshop is a PRACE Advanced Training Centre (PATC) course, organised by LRZ & JSC for the Gauss Centre for Supercomputing.