Projection of the Cost-Effectiveness of PIMs for Particle Transport Codes

Christopher, Thomas Woods

Sandia National Laboratories

关键词: Computer Architecture;    99 General And Miscellaneous//Mathematics, Computing, And Information Science;    Supercomputers;    Cost;    Algorithms;   

DOI  :  10.2172/820890
RP-ID  :  SAND2003-1887
RP-ID  :  AC04-94AL85000
RP-ID  :  820890

美国|英语

来源: UNT Digital Library

【 摘 要 】

PIM (Processor in Memory) architectures are being proposed for future supercomputers, because they reduce the problems that SMP MMPs have with latency. However, they do not meet the SMP MPP balance factors. Being relatively processor rich and memory starved, it is unclear whether an ASCI application could run on them, either as-is or with recoding. The KBA (Koch-Baker-Alcouffe) algorithm (Koch, 1992) for particle transport (radiation transport) is shown not to fit on PIMs as written. When redesigned with a 3-D allocation of cells to PIMs, the resulting algorithm is projected to execute an order of magnitude faster and more cost-effectively than the KBA algorithm, albeit with high initial hardware costs.