Enabling dual-core mode in BlueGene/L: challenges and solutions

  • G. Almasi IBM Thomson J. Watson Research Center
  • L. R. Bachega IBM Thomson J. Watson Research Center
  • Siddhartha Chatterjee IBM Thomson J. Watson Research Center
  • Manish Gupta IBM Thomson J. Watson Research Center
  • D. Lieber IBM Thomson J. Watson Research Center
  • X. Martorell IBM Thomson J. Watson Research Center
  • J. E. Moreira IBM Thomson J. Watson Research Center

Resumo


BlueGene/L is a massively parallel computer system with 65536 dual-processor compute nodes. The peak performance of BlueGene/L is in excess of 360 TFLOP/s if both processor cores in a node are used for computation. The main challenge of deploying this dual-core mode of operation is that the L1 caches in each core are not hardware coherent. This forces a software-based approach to cache coherence and guides our design of a programming model for dual-core mode. We describe the design, implementation, and performance evaluation of system software for enabling the use of dual-core mode on BlueGene/L. Our preliminary performance results show that our approach to dual-core mode is effective for key numerical kernels.
Palavras-chave: Hardware, Concurrent computing, High performance computing, Kernel, Random access memory, Engines, Coherence, System software, Collaboration, Laboratories
Publicado
10/11/2003
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ALMASI, G.; BACHEGA, L. R.; CHATTERJEE, Siddhartha; GUPTA, Manish; LIEBER, D.; MARTORELL, X.; MOREIRA, J. E.. Enabling dual-core mode in BlueGene/L: challenges and solutions. In: INTERNATIONAL SYMPOSIUM ON COMPUTER ARCHITECTURE AND HIGH PERFORMANCE COMPUTING (SBAC-PAD), 15. , 2003, São Paulo/SP. Anais [...]. Porto Alegre: Sociedade Brasileira de Computação, 2003 . p. 19-26.