In the last three decades, it has been becoming more and more difficult to achieve high, or even modest efficiency on advanced HPC systems. As everybody here in R-CCS knows, the development of highly efficient and highly scalable software for modern HPC systems like K or Post-K requires multi-year effort of a team of exceptionally good researchers. Of course, many other HPC systems are even harder to use. Our particle simulator research team has been working on a new approach to solve this problem through the use of framework. Our FDPS framework allows the users to write their programs in the way very close to the way they would write them for a single-processor machine, and run them on large-scale parallel systems with very high efficiency. The guiding principle for the design of FDPS is to minimize inter-node communication and main memory access per timestep, without increasing the floating-point operations too much. I will discuss current state of FDPS and also our framework for stencil calculation, Formura. If time allows, I'll discuss how hardware design should be changed to achieve better efficiency, not just that relative to peak but the power efficiency which is far more important.
日時: 2018年10月5日(金)、13:00 – 14:00
場所: R-CCS 6階講堂
・講演題目：Toward a Science of HPC software (and hardware)
・講演者：牧野 淳一郎（粒子系シミュレータ研究チーム チームリーダー）