Martin Ohmacht

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This paper describes an end-to-end system implementation of the transactional memory (TM) programming model on top of the hardware transactional memory (HTM) of the Blue Gene/Q (BG/Q) machine. The TM programming model supports most C/C++ programming constructs on top of a best-effort HTM with the help of a complete software stack including the compiler, the(More)
Blue Gene/L system architecture A. Gara M. A. Blumrich D. Chen G. L.-T. Chiu P. Coteus M. E. Giampapa R. A. Haring P. Heidelberger D. Hoenicke G. V. Kopcsay T. A. Liebsch M. Ohmacht B. D. Steinmacher-Burow T. Takken P. Vranas The Blue Genet/L computer is a massively parallel supercomputer based on IBM system-on-a-chip technology. It is designed to scale to(More)
compute chip: Memory and Ethernet subsystem M. Ohmacht R. A. Bergamaschi S. Bhattacharya A. Gara M. E. Giampapa B. Gopalsamy R. A. Haring D. Hoenicke D. J. Krolak J. A. Marcella B. J. Nathanson V. Salapura M. E. Wazlowski The Blue Genet/L compute chip is a dual-processor system-on-a-chip capable of delivering an arithmetic peak performance of 5.6 gigaflops.(More)
advanced diagnostics environment M. E. Giampapa R. Bellofatto M. A. Blumrich D. Chen M. B. Dombrowa A. Gara R. A. Haring P. Heidelberger D. Hoenicke G. V. Kopcsay B. J. Nathanson B. D. Steinmacher-Burow M. Ohmacht V. Salapura P. Vranas This paper describes the Blue Genet/L advanced diagnostics environment (ADE) used throughout all aspects of the Blue Gene/L(More)
A processing-in-memory architecture for exascale systems R. Nair S. F. Antao C. Bertolli P. Bose J. R. Brunheroto T. Chen C.-Y. Cher C. H. A. Costa J. Doi C. Evangelinos B. M. Fleischer T. W. Fox D. S. Gallo L. Grinberg J. A. Gunnels A. C. Jacob P. Jacob H. M. Jacobson T. Karkhanis C. Kim J. H. Moreno J. K. O’Brien M. Ohmacht Y. Park D. A. Prener B. S.(More)
compute chip: Synthesis, timing, and physical design A. A. Bright R. A. Haring M. B. Dombrowa M. Ohmacht D. Hoenicke S. Singh J. A. Marcella R. F. Lembach S. M. Douskey M. R. Ellavsky C. G. Zoellin A. Gara As one of the most highly integrated system-on-a-chip application-specific integrated circuits (ASICs) to date, the Blue Genet/L compute chip presented(More)
The BlueGene/L supercomputer has been designed with a focus on power/performance efficiency to achieve high application performance under the thermal constraints of common data centers. To achieve this goal, emphasis was put on system solutions to engineer a power-efficient system. To exploit thread level parallelism, the BlueGene/L system can scale to 64(More)
The Blue Gene/L system at the Department of Energy Lawrence Livermore National Laboratory in Livermore, California is the world’s most powerful supercomputer. It has achieved groundbreaking performance in both standard benchmarks as well as real scientific applications. In that process, it has enabled new science that simply could not be done before. Blue(More)