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apenext: A Multi-Tflops LQCD Computing Project [article]

The APE Collaboration
2001 arXiv   pre-print
generation lattice QCD (LQCD) computing project, whose goal is the construction and operation of several large scale Multi-TFlops LQCD engines, providing an integrated peak performance of tens of TFlops  ...  This paper is a slightly modified and reduced version of the proposal of the apeNEXT project, which was submitted to DESY and INFN in spring 2000. .It presents the basic motivations and ideas of a next  ...  for apeNEXT.  ... 
arXiv:hep-lat/0102011v1 fatcat:omx24q2evjc5xgq2b7jv4glv5m

The apeNEXT project

F. Belletti, F. Bodin, Ph. Boucaud, N. Cabibbo, A. Lonardo, S. de Luca, M. Lukyanov, J. Micheli, L. Morin, O. Pene, D. Pleiter, F. Rapuano (+5 others)
2006 Nuclear Instruments and Methods in Physics Research Section A : Accelerators, Spectrometers, Detectors and Associated Equipment  
Several generations of massively parallel computers optimised for these applications have been developed within the APE (array processor experiment) project.  ...  This contribution explains how the apeNEXT architecture is optimised for Lattice QCD, provides an overview of the hardware and software of apeNEXT, and describes its new features, like the SPMD programming  ...  Acknowledgements We like to warmly thank all people who have contributed to the apeNEXT project in the past, in particular W. Errico, H. Kaldass, N. Paschedag, R. De Pietri, F. Di Renzo, and L.  ... 
doi:10.1016/j.nima.2005.11.203 fatcat:hzdljbq7kjakrdnpfrsjoklg7q

ApeNEXT: architettura ed algoritmi di LGT

Toni Giorgino, Raffaele Tripiccione
2001 Zenodo  
[English] The aim of this thesis work was to measure the efficiency of the dedicated apeNEXT supercomputer, under design at INFN in Pisa, on a computation kernel particularly significant for lattice QCD  ...  A code has been written to realise this computation, and the code has been run on a hardware model that reproduces its behaviour with the accuracy of one clock cycle.  ...  La rappresentazione più usata nei calcolatori digitaliè quella standardizzata 1 dall'IEEE (Institute for Electrical and Electronic Engineers, inc.).  ... 
doi:10.5281/zenodo.4651591 fatcat:4bgg3bkvvvc6pjooxlcw3rnc64

The Potential of On-Chip Multiprocessing for QCD Machines [chapter]

Gianfranco Bilardi, Andrea Pietracaprina, Geppino Pucci, Fabio Schifano, Raffaele Tripiccione
2005 Lecture Notes in Computer Science  
We explore the opportunities offered by current and forthcoming VLSI technologies to on-chip multiprocessing for Quantum Chromo Dynamics (QCD), a computational grand challenge for which over half a dozen  ...  Memory-Communication-Processing Tradeoffs for LQCD In this section, we apply the methodology developed in Section 2 to lattice QCD (LQCD), a discretized version of QCD, currently the most amenable for  ...  The LQCD Computation The Lattice In LQCD, space-time is discretized and represented as a a four-dimensional toroidal graph, whose arcs are the domain of the gauge field and whose vertices are the domain  ... 
doi:10.1007/11602569_41 fatcat:tl5vimt37vgtxor7ov5c4xalom

Towards the petaflop for Lattice QCD simulations the PetaQCD project

Jean-Christian Anglès d'Auriac, Denis Barthou, Damir Becirevic, René Bilhaut, François Bodin, Philippe Boucaud, Olivier Brand-Foissac, Jaume Carbonell, Christine Eisenbeis, Pascal Gallard, Gilbert Grosdidier, Pierre Guichon (+8 others)
2010 Journal of Physics, Conference Series  
4-5 USA 11 Currently, most of the computing power is provided by dedicated computers, specifically developed for LQCD.  ...  The use of super-computers (financed by the DOE) is also expected to provide a similar amount of computing power for LQCD.  ... 
doi:10.1088/1742-6596/219/5/052021 fatcat:ihb35o3ob5crnalmtkmof5leby

Ab Initio Determination of Light Hadron Masses

S. Durr, Z. Fodor, J. Frison, C. Hoelbling, R. Hoffmann, S. D. Katz, S. Krieg, T. Kurth, L. Lellouch, T. Lippert, K. K. Szabo, G. Vulvert
2008 Science  
Three lattice spacings are used for a continuum extrapolation.  ...  Blue Gene /L In Europe: apeNEXT Lattice QCD simple domain decomposition scalability highly demanding as to cache-to-memory data rate about 1 Byte / flop If LQCD performs well, most  ...  Virtual cut-through hardware routing 425 MB/s on all 12 node links (5.1 GB/s per node) Communications backbone for computations 188 TB/s total bandwidth Collective Network Interconnects all compute  ... 
doi:10.1126/science.1163233 pmid:19023076 fatcat:6lygg372uresrncvjhzwsx3zwm

QPACE: Quantum Chromodynamics Parallel Computing on the Cell Broadband Engine

Gottfried Goldrian, Thomas Huth, Benjamin Krill, Jack Lauritsen, Heiko Schick, Ibrahim Ouda, Simon Heybrock, Dieter Hierl, Thilo Maurer, Nils Meyer, Andreas Schäfer, Stefan Solbrig (+8 others)
2008 Computing in science & engineering (Print)  
Application-driven computers for Lattice Gauge Theory simulations have often been based on system-on-chip designs, but the development costs can be prohibitive for academic project budgets.  ...  An alternative approach uses compute nodes based on a commercial processor tightly coupled to a custom-designed network processor.  ...  Our project's primary goal is to make a vast amount of computing power available for LQCD research.  ... 
doi:10.1109/mcse.2008.153 fatcat:2payrontpfhuhgyywk3b2ozbga

Lattice QCD Applications on QPACE [article]

Y. Nakamura, A. Nobile, D. Pleiter, H. Simma, T. Streuer, T. Wettig, F. Winter
2011 arXiv   pre-print
The compute power of the processor is provided by 8 Synergistic Processing Units. Making efficient use of these accelerator cores in scientific applications is challenging.  ...  In this paper we describe our strategies for porting applications to the QPACE architecture and report on performance numbers.  ...  Acknowledgments We thank all members of the QPACE team for their hard and creative work that laid the groundwork for the studies reported on in this paper.  ... 
arXiv:1103.1363v1 fatcat:7aw6glmrq5hylhinsaeyt7mcb4

Lattice QCD Applications on QPACE

Y. Nakamura, A. Nobile, D. Pleiter, H. Simma, T. Streuer, T. Wettig, F. Winter
2011 Procedia Computer Science  
The compute power of the processor is provided by 8 Synergistic Processing Units. Making efficient use of these accelerator cores in scientific applications is challenging.  ...  In this paper we describe our strategies for porting applications to the QPACE architecture and report on performance numbers.  ...  Acknowledgments We thank all members of the QPACE team for their hard and creative work that laid the groundwork for the studies reported on in this paper.  ... 
doi:10.1016/j.procs.2011.04.089 fatcat:3swjjkhh7bcgxnomtjcwid5ili

GRAPE-DR

Junichiro Makino, Kei Hiraki, Mary Inaba
2007 Proceedings of the 2007 ACM/IEEE conference on Supercomputing - SC '07  
simulations such as astrophysical many-body simulations and molecular-dynamics simulations, quantum chemistry calculations, various applications which requires dense matrix operations, and many other compute-intensive  ...  Acknowledgments The authors thank Toshiyuki Fukushige, Yoko Funato, Piet Hut, Toshikazu Ebisuzaki, and Makoto Taiji for discussions related to this work.  ...  This research is partially supported by the Special Coordination Fund for Promoting Science and Technology (GRAPE-DR project), Ministry of Education, Culture, Sports, Science and Technology, Japan.  ... 
doi:10.1145/1362622.1362647 dblp:conf/sc/MakinoHI07 fatcat:5w5ogh4po5bdxp4uzi4aif3ese

AN ALGORITHMIC APPROACH TO QUANTUM FIELD THEORY

MASSIMO DI PIERRO
2006 International Journal of Modern Physics A  
We also provide examples of typical results from lattice QCD computations for quantities of phenomenological interest.  ...  The lattice formulation provides a way to regularize, define and compute the Path Integral in a Quantum Field Theory.  ...  Acknowledgements I wish to acknowledge the Fermilab theory group for many years of fruitful collaboration and specifically thank Paul Mackenzie for his comments about this manuscript.  ... 
doi:10.1142/s0217751x06028965 fatcat:jnpdjqtcu5fg3hsr2ksg5y77xu

The finite-temperature phase structure of lattice QCD with twisted-mass Wilson fermions [article]

E.-M. Ilgenfritz, K. Jansen, M. P. Lombardo, M. Müller-Preussker, M. Petschlies, O. Philipsen, L. Zeidlewicz
2008 arXiv   pre-print
We identify the finite temperature transition/crossover for a non-vanishing twisted-mass parameter in the neighbourhood of the zero-temperature critical line at sufficiently high β.  ...  We report progress in our exploration of the finite-temperature phase structure of two-flavour lattice QCD with twisted-mass Wilson fermions and a tree-level Symanzik-improved gauge action for a temporal  ...  Most simulations have been done at the apeNEXT in Rome and DESY-Zeuthen. This work has been supported in part by the DFG Sonderforschungsbereich/Transregio SFB/TR9-03. O. P. and L.  ... 
arXiv:0809.5228v3 fatcat:xedizr4ylbbmhmymusxgsd4n3i

Code development (not only) for NSPT

Michele Brambilla, Dirk Hesse, Francesco Di Renzo
2014 Proceedings of 31st International Symposium on Lattice Field Theory LATTICE 2013 — PoS(LATTICE 2013)   unpublished
The key point for an efficient solution is a framework in which everything is computed order by order.  ...  We present "parmalgt", a general C++ framework mainly intended for NSPT computations that we are currently developing.  ...  The first implementation was written in the TAO language for the apeNEXT machine. In this version lattice size and parallelization strategy were deeply coded in the program.  ... 
doi:10.22323/1.187.0418 fatcat:wm244fvxb5hc3ixo2tqujg3v4y

The finite-temperature phase structure of lattice QCD with twisted-mass Wilson fermions

Ernst-Michael Ilgenfritz, Karl Jansen, Maria-Paola Lombardo, Michael Muller-Preussker, Marcus Petschlies, Owe Philipsen, Lars Zeidlewicz
2009 Proceedings of The XXVI International Symposium on Lattice Field Theory — PoS(LATTICE 2008)   unpublished
We identify the finite temperature transition/crossover for a non-vanishing twisted-mass parameter in the neighbourhood of the zerotemperature critical line at sufficiently high β .  ...  We report progress in our exploration of the finite-temperature phase structure of two-flavour lattice QCD with twisted-mass Wilson fermions and a tree-level Symanzik-improved gauge action for a temporal  ...  Most simulations have been done at the apeNEXT in Rome and DESY-Zeuthen. This work has been supported in part by the DFG Sonderforschungsbereich/Transregio SFB/TR9-03. O. P. and L.  ... 
doi:10.22323/1.066.0206 fatcat:whfx2x556zdwxbkvkxz3nov4qq

Investigation of hadron matter using lattice QCD and implementation of lattice QCD applications on heterogeneous multicore acceleration processors

Frank Winter
2012
Lattice QCD simulations tend to be extremely expensive, reaching the need for petaflop computing and beyond, a regime of computing power we just reach today.  ...  In this work new design concepts were developed for an active library (QDP++) harnessing the compute power of a heterogeneous multicore processor (IBM PowerXCell 8i processor).  ...  Among those, the apeNEXT and QCDOC machines [141, 142] and the latest application-optimised HPC machine, QPACE [143] , a new type of massively parallel computer.  ... 
doi:10.5283/epub.22098 fatcat:h5r4i45ggrc3limagysh7lmyse