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PPCES 2020
Wednesday, 2. December 2020 - Thursday, 3. December 2020
Online HPC Seminar and Workshop
Since we had to cancel the PPCES workshop planned for March (March, 16 – 20, 2020) this year at short notice,we are offering this online workshop on December 2nd and 3rd, 2020
Please find information about the preceeding Introduction to HPC on March 03, 2020 >>>
About PPCES
This 2-days online event will continue the tradition of previous annual week-long events that take place in Aachen every spring since 2001. This time we will only cover the basics of parallel programming using OpenMP and MPI in Fortran and C/C++ and a frist step towards performance tuning. Hands-on exercises for each topic will be included.
The contents of the courses are generally applicable but will be specialized towards CLAIX the compute cluster which is the current system installed at the RWTH’s IT Center. It might be helpful to read through the information which was provided during the HPC introduction on March 3 this year. This is especially true if you want to actively use CLAIX after this event.
OpenMP is a widely used approach for programming shared memory architectures, supported by most compilers nowadays. We will cover the basics of the programming paradigm as well as some advanced topics such as programming NUMA machines. The nodes of the RWTH Compute Cluster contain an increasing number of cores and thus we consider shared memory programming a vital alternative for applications that cannot be easily parallelized with MPI. We also expect a growing number of application codes to combine MPI and OpenMP for clusters of nodes with a growing number of cores.
The Message Passing Interface (MPI) is the de-facto standard for programming large HPC systems. We will introduce the basic concepts and give an overview of some advanced features. Also covered is hybrid parallelization, i.e., the combination of MPI and shared memory programming, which is gaining popularity as the number of cores per cluster node grows.
Prerequisites
Attendees should be comfortable with C/C++ or Fortran programming in a Linux environment and interested in learning more about the technical details of application tuning and parallelization.
All presentations will be given in English.
This event will be an online presentation.
Agenda
Day 1: OpenMP (Wednesday, December 2)
| Start | End | Topic |
|---|---|---|
| 09:30 | 09:50 | Welcome + OpenMP Overview |
| 09:50 | 10:15 | OpenMP Worksharing |
| 10:15 | 10:35 | OpenMP Scoping |
| 10:35 | 10:45 | Exercise Setup |
| 10:45 | 11:00 | Break |
| 11:00 | 11:30 | Exercises |
| 11:30 | 12:00 | OpenMP & NUMA |
| 12:00 | 14:00 | Break |
| 14:00 | 14:30 | OpenMP Tasking: Basics |
| 14:30 | 15:00 | OpenMP Tasking: Scoping & Synchronization |
| 15:00 | 15:15 | Exercises |
| 15:15 | 15:30 | Break |
| 15:30 | 16:00 | Exercises |
| 16:00 | 16:30 | Solutions to Exercises + Q & A |
Day 2: MPI (Thursday, December 3)
| Start | End | Topic |
|---|---|---|
| 09:30 | 09:40 | Welcome & Overview (10 min) |
| 09:40 | 10:00 | MPI Basics (20 min) |
| 10:00 | 10:35 | Blocking Point-to-point communication (30 min) |
| 10:35 | 11:45 | Exercise Setup |
| 10:45 | 11:00 | Coffee Break |
| 11:00 | 11:30 | Exercises |
| 11:30 | 12:00 | Non-blocking (point-to-point) communication (30 min) |
| 12:00 | 14:00 | Lunch break |
| 14:00 | 14:30 | Collective Communication (30 min) |
| 14:30 | 15:00 | Exercises (30 min) |
| 15:00 | 15:15 | Coffee break |
| 15:15 | 15:45 | ARM Performance Reports (30 min) |
| 15:45 | 16:00 | Exercises (Perf Reports) (15 min) |
| 16:00 | 16:30 | Solutions to Exercises + Q & A (30 min) |
| 16:30 | 16:45 | Wrap-Up |
Registration
Please register here until November 25, 2020 >>> [REGISTRATION CLOSED]
Registered participants will receive further information by email.
Course Material
Day 1: OpenMP
01_OpenMP_Introduction-Overview.pdf
02_OpenMP_Introduction-Worksharing.pdf
03_OpenMP_Introduction-Scoping.pdf
OpenMP_Exercises_2020_online.pdf
05_OpenMP_Introduction-Tasking.pdf
06_OpenMP_TaskingAndScoping.pdf
07_OpenMP_TaskingAndSynchronization.pdf
Day 2: MPI
03_MPI_Blocking_Point-to-Point_Communication.pdf
04_MPI_Non-blocking-Point-to-Point_Communication.pdf
05_MPI_Blocking_Collective_Communication.pdf
Q&A Seesion
Further Information
The OpenMP part is also available as online tutorial (including videos): https://hpc-wiki.info/hpc/OpenMP_in_Small_Bites
Contact
Tim Cramer / Dieter an Mey
Tel.: +49 (241) 80-24924 / 80-24377
E-mail: hpcevent@itc.rwth-aachen.de
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