Memory Accelerator for Irregular Applications - From the Context of Exa FLOPS Machine

Bibliographic Information

Other Title
  • 不規則型応用を加速するメモリアクセラレータ - Exa FLOPSマシンの文脈から

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Description

In Japan, hierarchical cache is currently given high priority for memory system of Exa FLOPS machine whose Byte/FLOP ratio must be smaller than current supercomputers. On the other hand, irregular applications require higher Byte/FLOP ratio. Since these occupy a large part of MEXT-selection of focused applications, supporting irregular applications is important in the context of Japanese Exa FLOPS machine. In this report, a memory system with gather functions is reconsidered in the context of Exa FLOPS machine. We explored hit ratio of a current GPU's cache and performance of memory system with gather function and its preliminary stage cache for sparse matrix vector multiplication. As a result, performance gain by the additional cache is limited and disappeared for vector with about 10times higher size than the cache capacity. It is confirmed that the importance of gather function for irregular applications is higher than that of cache whose acceleration principle is based on reusability.

Journal

  • IPSJ SIG Notes

    IPSJ SIG Notes 2011 (14), 1-8, 2011-11-21

    Information Processing Society of Japan (IPSJ)

Keywords

Details 詳細情報について

  • CRID
    1570009752137993344
  • NII Article ID
    110008690456
  • NII Book ID
    AN10463942
  • Text Lang
    ja
  • Data Source
    • CiNii Articles

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