PROJECT
We propose an open source infrastructure for development and execution of optimized and reliable simulation code on post-peta-scale (pp) parallel computers based on many-core architectures. We have named this infrastructure “ppOpen-HPC”. ppOpen-HPC consists of various types of libraries, which cover various procedures for scientific computation. Source code developed on a PC with a single processor is linked with these libraries, and the parallel code generated is optimized for post-peta-scale systems. A capability for automatic tuning is important, and is seen as a critical technology for further development on new architectures, as well as for maintenance of the framework.
Overview of ppOpen-HPC
“ppOpen-HPC” is being developed by the following six institutes, including four departments of the University of Tokyo:
- The University of Tokyo
- Information Technology Center (ITC)
- Atmospheric and Ocean Research Institute (AORI)
- Center for Integrated Disease Information Research (CIDIR)
- Graduate School of Frontier Sciences (GSFS)
- Academic Center for Computing and Media Studies, Kyoto University
- Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
The expertise of members covers a wide range of disciplines related to scientific computing, such as system software, numerical libraries/algorithms, computational mechanics, and earth sciences. Six key issues for algorithms and applications for post-peta/exa-scale computing are as follows:
- Hybrid/Heterogeneous Architectures
- Mixed Precision Computation
- Auto-Tuning/Self-Adaptation
- Fault Tolerance
- Communication/Synchronization Reducing Algorithms
- Reproducibility of Results
In ppOpen-HPC, six five issues are carefully considered. ppOpen-HPC includes the following four components, as shown in figure:
- ppOpen-APPL
- ppOpen-MATH
- ppOpen-AT
- ppOpen-SYS
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Libraries in ppOpen-APPL, ppOpen-MATH, and ppOpen-SYS are called from user’s programs written in Fortran and C/C++ with MPI. All issues related to hybrid parallel programming models are “hidden” from users by ppOpen-AT.
See also: