Vargas, IBM eServer (Regatta Power6)

• 3,584 cores Power6

• 17,5 Tbytes of memory

• 67,3 Tflops total peak performance

• NetworkInfiniBand x4 DDR

Hardware Description:

• 112 SMP nodes p575 IH :
  • 32 cores Power6 par node,
  • 28 nodes with 256 Gb shared memory,
  • 84 nodes with 128 Gb shared memory,

• Disk space :
  • 800 Tbytes shared between the Blue Gene/P and the Power6,
  • 400 Tbytes local to the Power6 nodes, for fast access to the TMPDIR (de 500 Mb/s to 1 Gb/s environ).

Power6 characteristics:

• Dual-core, each core is capable of 2-way SMT
• CPU frequency : 4,7 GHz
• L1 Cache: 64 Kb data
• L1 Cache: 64 Kb instruction
• L2 Cache: 4 Mb per core (with fast access by the other core)
• L3 Cache: 32 Mb shared (one cache controller per core) bandwith up to 80 Gb/s
• Number opf loading unit(load/store): 2 per core
• Number of integer unit: 2 per core
• Number of floating point unit: 2 per core
• Number of AltiVec unit: 1 per core

Doftware Description

• AIX version 5.3
• LoadLeveler 3.4.3
• GPFS version 3.2.1
• poe version 4.3.2
• LAPI version 2.4.5

IBM Compilers:

IBM Scientific libraries:

• ESSL version 4.3
• PESSL version 3.3