This document provides an overview of RIKEN, an institute for basic research in Japan, and its Advanced Institute for Computational Science (AICS) located in Kobe. It discusses RIKEN's facilities, budget, and centers across Japan. It then describes AICS in more detail, including its computer and research buildings. The document outlines Japan's FLAGSHIP2020 Project which involves developing the next-generation supercomputer called Post-K working with Fujitsu, as well as developing applications in priority science areas like healthcare, disaster prevention, and energy. It provides high-level details on Post-K's planned ARM-based architecture and software stack.

1. Introduction of Post-K
development
Yutaka Ishikawa
RIKEN AICS
9:30AM – 9:55AM, 12th of December, 2017

2. RIKEN
2
 National institute for basic research in Japan
covering physical to biological sciences
 Foundation in 1917
 3,000 researchers, 400 administrators
 14 centers in 9 sites across Japan including
AICS in Kobe
 10 joint laboratories abroad
 Annual budget: 83 billion JY (690M$)
A Sendai
B Tsukuba
C Wako
D Tokyo
E Yokohama
F Nagoya
G Osaka
H Kobe
I Harima
A
BC
D
EF
G
H
I
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3. RIKEN
3
A Sendai
B Tsukuba
C Wako
D Tokyo
E Yokohama
F Nagoya
G Osaka
H Kobe
I Harima
A
BC
D
EF
G
H
I
 National institute for basic research in Japan
covering physical to biological sciences
 Foundation in 1917
 3,000 researchers, 400 administrators
 14 centers in 9 sites across Japan including
AICS in Kobe
 10 joint laboratories abroad
 Annual budget: 83 billion JY (690M$)
20017/12/12
RIKEN
Advanced Institute for
Computational
Science

4. Computer
building
Substation Supply
Chillers
Research
Building
【Computer Building】
floor space 10,500㎡
construction area 4,300㎡
building structure steel
cooling system 1B 14 units
2F 50 units
【Heat and Power Buiding】
【Seismic isolation system】
Resistent to strong earth quakes
up to shake strength 6
Total electric power 15MW
Electric facilities
70kV high-voltage input
 gas turbine
co-generation system
RIKEN AICS (Advanced Institute for Computational Science)
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【cross sectional view】
Research building Computer building
K computer
Global file system
Air cooling system
Air cooling system
office
office
office
office
office
Machine room
Machine room
Air conditioner room
Computer room
Computer room
office
office
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 Specification
 11.28PFlops with 88,128 nodes
 SPARC64TM VIIIfx x 8 (128 Gflops)
 1.27PB(16GB/node) memory
 6 D mesh-torus network
 30PB disk
 Top 500 ranking
 No. 1 in Jun. & Nov. 2011
 No. 8 in Nov. 2017

5. FLAGSHIP2020 Project
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Servers
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Servers
Maitenance
Servers
Maitenance
Servers
I/O NetworkI/O Network
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… Hierarchical
Storage System
Hierarchical
Storage System
Portal
Servers
Portal
Servers
 Missions
• Building the Japanese national flagship supercomputer,
post K, and
• Developing wide range of HPC applications, running on
post K, in order to solve social and science issues in
Japan
 Project organization
• Post K Computer development
• RIKEN AICS is in charge of development
• Fujitsu is vendor partner.
• International collaborations: DOE, JLESC, CEA
• Applications
• The government selected
• 9 social & scientific priority issues
and their R&D organizations.
• 4 Exploratory Issues
 Status
• “Basic Design” was finalized and now in
“Design and Implementation” phase.
• We have decided to choose ARM v8 with
SVE as ISA for post‐K manycore
processor.
• We are working on detail evaluation by
simulators and compilers
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6. Target science: 9 Priority Issues
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重点課題① ⽣体分⼦システムの機能制御による ⾰新的創薬基盤の構築
①Innovative Drug Discovery
RIKEN Quant. Biology Center
重点課題② 個別化・予防医療を⽀援する 統合計算⽣命科学
②Personalized and Preventive
Medicine
Inst. Medical Science, U. Tokyo
重点課題③ 地震・津波による複合災害の
統合的予測システムの構築③Hazard and Disaster induced by
Earthquake and Tsunami
Earthquake Res. Inst., U. Tokyo
重点課題④ 観測ビッグデータを活⽤した
気象と地球環境の予測の⾼度化
④Environmental Predictions
with Observational Big Data
Center for Earth Info., JAMSTEC
重点課題⑥ ⾰新的クリーンエネルギー システムの実⽤化
⑥Innovative Clean Energy
Systems
Grad. Sch. Engineering, U. Tokyo
重点課題⑦ 次世代の産業を⽀える
新機能デバイス・⾼性能材料の創成⑦New Functional Devices and
High-Performance
Inst. For Solid State Phys., U. Tokyo
重点課題⑧ 近未来型ものづくりを先導する ⾰新的設計・製造プロセスの開発
⑧ Innovative Design and
Production Processes for the
Manufacturing Industry in the
Near Future
Cent. for Earth Info., JAMSTEC
重点課題⑤ エネルギーの⾼効率な創出、変換・貯蔵、 利⽤の新規基盤技術の開発
⑤High-Efficiency Energy
Creation, Conversion/Storage
and Use
Inst. Molecular Science, NINS
重点課題⑨ 宇宙の基本法則と進化の解明
⑨Fundamental Laws and
Evolution of the Universe
Cent. for Comp. Science, U. Tsukuba
Society with health and longevity
Disaster prevention
and global climate
Energy issues
Industrial
competitiveness
Basic science

7. Target science: 4 Exploratory Issues
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萌芽的課題⑪ 複数の社会経済現象の相互作⽤の
モデル構築とその応⽤研究
萌芽的課題⑩ 基礎科学のフロンティア
－ 極限への挑戦Frontiers of Basic Science -
challenge to extremes -
Interactive Models of Socio-
Economic Phenomena and their
Applications
萌芽的課題⑫ 太陽系外惑星（第⼆の地球）の誕⽣と
太陽系内惑星環境変動の解明Formation of exo-planets (second
Earth) and Environmental
Changes of Solar Planets
萌芽的課題⑬ 思考を実現する神経回路機構の
解明と⼈⼯知能への応⽤Mechanisms of Neural Circuits
for Human Thoughts and Artificial
Intelligence
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8. CPU Architecture
 Armv8-A + SVE (Scalable Vector Extension)
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FP64/FP32/FP16
 Fujitsuʼs extensions
 Inter core barrier
 Sector cache
 Hardware prefetch assist
https://developer.arm.com/products/architecture/a-profile/docs
Reducing fork/join sync.

9. An Overview of Post K
 Compute Node, Compute + I/O Node
 Arm V8 SVE + Fujitsu Extension
 Many Cores (Compute Cores + OS Cores)
 6D mesh/torus Interconnect
 3-level hierarchical storage system
 Silicon Disk
 Magnetic Disk
 Storage for archive
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Login
Servers
Login
Servers
Maintenance
Servers
Maintenance
ServersI/O NetworkI/O Network…
Hierarchical
Storage System
Hierarchical
Storage System
Portal
Servers
Portal
Servers
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10. Software Stack developed by Fujitsu and RIKEN
Light-Weight Kernel:
McKernel
Linux
Kernel
Linux + McKernel
Linux Kernel
Linux Only
Two runtime modes are transparently provided
Fujitsu RIKEN AICS
Batch Job System Technical Computing Suite
Programming
Language
Fortran, C/C++, OpenMP,
Java
XMP (XcalableMP),
FDPS (Framework for Developing
Particle Simulator),
Contribution to LLVM for SVE
Math Library
BLAS/LAPACK/ScaLAPACK,
SSL II
Enhancement of BLAS and etc.,
EigenEXA, Batched BLAS, …
Tool Eclipse plugin, … RIKEN Simulator
File System and File
I/O
FEFS ( Fujitsu Exabyte File
System), LLIO
DTF (Data Transfer Framework),
FTAR(Flagmented TAR)
Communication OpenMPI MPICH, LLC
Process/Thread
Management
PiP (Process in Process)
OS Kernel Linux McKernel
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