Babel, IBM Blue Gene/P

• 40.960 cores PowerPC 450
• 20 Tbytes of memory
• 139 Tflops total peak performance

More details about using this machine here

Hardware Description:

• 10 racks Blue Gene/P (10240 compute nodes, 40960 cores PowerPC 450, 20 Tbytes of memory for a total peak performance of : 139 Tflops)
• Disk space :
  • 800 Tbytes shared between the Blue Gene/P and the Power6.

PowerPC characteristics :

• Peak performance : 3,4 GF/s (13,6 GF/s for a compute node)
• CPU frequency : 850 MHz
• L1 data cache : 32 K
• L1 instruction cache : 32 K
• L2 data cache : 14 stream prefetching
• L3 cache : 8 MB (shared within a compute node, i.e between 4 cores)

• IDRIS Bluegene/P system is composed of 10 racks.
• Each rack is composed of 2 mid-planes i.e, 512 compute nodes or 2048 cores
• A node card is composed of 32 compute nodes and a compute node has 4 cores
• There is 1 IO node for each partition of 64 compute nodes .

© CNRS - IDRIS, 13/01/2012