Introduction to the LIKWID tool suite (online)
Topic outline
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LIKWID stands for "Like I Knew What I'm Doing." It is a tool suite for performance-aware programming on modern clusters. LIKWID is in wide use at many computing centers worldwide and can be employed on the full spectrum of platforms, from laptop to supercomputer.
LIKWID comprises a spectrum of command-line tools and follows the UNIX philosophy of "one tool, one purpose." In this course, we will cover the following tools in depth:
- likwid-topology, a node-level topology exploration tool
- likwid-pin, for enforcing thread-core affinity in thread-parallel programs
- likwid-mpirun, for starting MPI and MPI/OpenMP-hybrid programs and enforcing thread-core affinity
- likwid-perfctr, for counting hardware events and measuring derived metrics
- likwid-bench, a microbenchmarking framework
A strong focus will be on diagnostic performance engineering using hardware performance counters on real application codes. Hands-on exercises will enable attendees to consolidate the acquired knowledge.
Requirements
- Basic understanding of parallel programming with MPI and OpenMP
- Fluency on the Linux command line
- Editing files through ssh connection via vim, emacs, nano, ...
- A current web browser since system access is provided through Jupyter notebooks.
Instructors
Thomas Gruber and Georg Hager (NHR@FAU)
This course is organized by Erlangen National High Performance Computing Center (NHR@FAU)
Time & Date
July 24, 2023, 9:30 a.m. - 4:30 p.m. CEST
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