GASPI-Forum

Protocol of the GASPI Forum meeting on January, 10th, 2018, Frankfurt/Main

Date: 2018.01.10
Location: Frankfurt/Main, Wilhelm-Fay Straße 54
Start: 11:00h
End: 16:00h

Participants:

• Fraunhofer ITWM (Mirko Rahn, Daniel Grünewald, Martin Kühn)
• ZIH, TU Dresden (Christian Herold)
• DLR (Tom Gerhold, Olaf Krzikalla)
• LRZ (Christoph Bernauer)
• Tartu University, Estonia (Benson Muite)
• T-Systems SfR (Christian Simmendinger)

Agenda:

Daniel: GaspiCXX

C++ interface to Gaspi / GPI-2

• Idea: Improve usability, retain performance
• Generic (fully dynamic) resource management
• Segment memory management
• Segment notification management
• RAII: Segment, Queue, Group
• Abstraction of communication
• Setup phase: may be „expensive“
• „Production“ phase: full performance

Christian: Shared Memory Segments for GASPI

• Idea: Support for Migration from legacy MPI-only applications
• Replace node-internal communication with shared memory data dependencies
• Replace intra-node MPI communication with GASPI notified communication
• Aggregate intra-node communication

Errata Proposals

General Text Proposals

Discussion

• Use of GASPI for halo exchange library, such as detailed in https://arxiv.org/abs/1207.1746
• Use of GASPI in DASH project http://www.dash-project.org/team.html

Tutorials / Hackathon

• Benson Muite: Still investigating workshop/hackathon

Next meeting:

• June, 27 2017 in Frankfurt