The Earth Simulator System

Hui Zhu

Instructor Dr. Damian

Introduction

Application to the atmospheric and oceanographic science

Application to the solid earth science

System Overview

Highly parallel vector supercomputer system

1. consisting of 640 processor nodes (PN)

2. Interconnection network (IN)

The physical system is composed of • 320 PN cabinets, each containing 2

processor nodes• 65 IN cabinets contain the interconnection

network

Processor Node (PN)

Shared memory parallel vector supercomputer

Every node contains 8 arithmetic processors (AP). a main memory system (MS).

Interconnection Network

A huge 640*640 crossbar switch Divided into a control unit and 128 data s

witch units

Interconnection Network

No supervisor exists in the interconnection network. The control unit and the 128 data switch units operate asynchronously.

Interconnection Network

Error Occurrence Rate Problem

83,200 pairs of serial transmissions are used for realizing the aggregate switching capacity, 130 pairs are used for connecting processor node and interconnection network

ECC codes are added to the transfer data

Interconnection Network

To realize the high-speed parallel processing synchronization

1. Global Barrier Counter (GBC)

2. Global Barrier Flag (GBF)

OS Managment

Super Cluster System

640 PNs grouped into 40 clusters A supervisor called Super-Cluster control

station(SCCS) manages all clusters Every cluster has it’s own cluster control s

tation(CCS)

Performance

The most powerful supercomputer in the world

Achieving 35.86 TFLOPS, 87.5% of peak performance of the system in LINPACK benchmark

Conclusion Vector processor Shared memory High-bandwidth and non-blocking

interconnection crossbar network

Conclusion

UK Met office for operational weather forecasts and the Hadley center for climate research have some collaboration with the Earth simulator.