1. Earth Simulator Jari Halla-aho Pekka Keränen

2. Architecture MIMD type distributed memory 640 Nodes, 8 vector processors each. 16GB shared memory per node 64GFlop/s peak performance per node Total: Peaks at 40TFlop/s 10 TB main memory, 700 TB disk space, 1.6 PT mass storage

4. Interconnection Network

5. Software Operating system: enhanced version of NEC SUPER-UX Parallel file system Three-level parallel processing environment Fortran 90, C and C++ compilers support automatic vectorization and parallelization Parallel analyzers, debuggers and tuning tools MPI vs. High Performance Fortran (HPF)

6. Performance TOP500.org: number one! LINPACK: 35,86 TFlops, which means 87,5 % compared to peak performance = 40,96 TFlops HP ASCI Q = 7,73/10,24 TFlops (second) MPI vs. HPF:

7. Scalability

8. Application areas