Blue Gene Technical Summary
| Architecture | IBM Blue Gene 3,072 compute nodes and 384 I/O nodes |
| Access Nodes | IBM B80 4 375 MHz Power 3 processors/node 2GB of Memory |
| Compute Nodes | 3,072 compute nodes; 2 processors / node 32bit architecture 700MHz 1 integer unit (FXU), 1load/store unit, 2 FPUs L1: 32kB, 32byte line, 64way L2: 16, 128-byte lines acts as prefetch buffer L3: 4MB, 35 cycles, shared Memory: 512MB, 350MHz, 85 cycles, shared 32 primary, 32 secondary registers 2 flops/FPU-clock & 4 flops/processor-clock |
| Network Interconnect | 3-D torus for point-to-point message passing and a global tree for collective message passing. |
| Disks | 225TB GPFS-WAN and 18TB GPFS Network Shared Disk (NSD) connected via 128 dedicated Blue Gene I/O nodes All Blue Gene I/O nodes connected internally to the global tree and externally via gigabit Ethernet |
| Operating System | Front End Nodes: SuSE SLES 9 Linux/PPC64 I/O Nodes: Embedded Linux Compute Nodes: Compute Node Kernel (blrts) |
| Compilers | IBM XL Fortran 77/90/95 (blrts_xlf v10.1); IBM C/C++ compilers (blrts_xlc v8.0) |
| Batch System | IBM Loadleveler |
