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ACAT 2005

ACAT 2005. Concluding Remarks. Thank you !!!. Institutions: DESY,Zeuthen, Bielefeld Univ., Helmholtz-Gemeinschaft, EPS Local organizing committee: Johannes Blümlein, Jochem Fleischer, Wolfgang Friebel, Ulrich Gensch, Matthias Kasemann, Thomas Naumann, Tord Riemann (Chair), Peter Wegner

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ACAT 2005

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  1. ACAT 2005 Concluding Remarks Denis Perret-Gallix LAPP/IN2P3

  2. Thank you !!! • Institutions: DESY,Zeuthen, Bielefeld Univ., Helmholtz-Gemeinschaft, EPS • Local organizing committee: Johannes Blümlein, Jochem Fleischer, Wolfgang Friebel, Ulrich Gensch, Matthias Kasemann, Thomas Naumann, TordRiemann (Chair),Peter Wegner • International Advisory Committee members • Conference Secretaries: Martina Mende, Christiane John, Sabine Miethling Denis Perret-Gallix LAPP/IN2P3

  3. AIHENP: “Artificial Intelligence in High Energy and Nuclear Physics” Lyon 1990, la Londes-Les-Maures 1992, Oberammergau 1993, Pisa 1995, Lausanne 1996, Heraklion 1999 ACAT: “Advanced Computing and Analysis Techniques in Physics” Chicago 2000, Moscow 2002, Tsukuba 2003, Zeuthen 2005 WWW: Jan. 92, first presentation to the HEP community (TBL) Symbolic/automatic calculations: building a community Neural networks, genetic algorithms Expert systems  agents Parallel computing Analysis tools A Short History ACAT 05: 10th of the series Denis Perret-Gallix LAPP/IN2P3

  4. Computing Theory Experiment "Raison d'être" modern research relies on the virtuous triangle Putting thinking, “intelligence” into Systems Denis Perret-Gallix LAPP/IN2P3

  5. Great plenary sessions (quantum computer, symbolic languages, Neural nets, Berlin physics history, DESY research) High quality presentations (High precision computation) New topics New contacts between participants New collaborations initiated Important Proceedings in preparation ACAT 2005 A "Grand Cru" Denis Perret-Gallix LAPP/IN2P3

  6. 2 years before the start of LHC, Where are the major question marks? Where should we concentrate our effort? ILC, … Are we ready for globalization of research: Technology ? Sociology ? ACAT 2005 Reality Check Denis Perret-Gallix LAPP/IN2P3

  7. “BOINC”: Global computation The “WikiWay”: Better, simpler communication High precision floating point computation XP: eXtreme Programming Flat thoughts "Emerging" Topics ? Denis Perret-Gallix LAPP/IN2P3

  8. Berkeley Open Infrastructure for Network Computing • “Free” power • Average: 1.5 Gflops system • 250 Tflops • ½ for 80% time 100 Tflops Top 500 N.1- Blue Gene 70 TFlops Climateprediction.net: study climate change Einstein@home: search for gravitational signals coming from pulsars LHC@home: improve the design of the CERN LHC particle accelerator Predictor@home: investigate protein-related diseases SETI@home: Look for radio evidence of extraterrestrial life Very important outreach Denis Perret-Gallix LAPP/IN2P3

  9. A web site is “self ”-updated. The site becomes a cooperative developing tool Stimulate the discussion Building a community Wikipedia… A new communication concept: the Wiki way Denis Perret-Gallix LAPP/IN2P3

  10. Denis Perret-Gallix LAPP/IN2P3

  11. Wiki development What next? • Security • Project management • Collaborative document writing: • Notes, meeting report, presentation, draft paper • Latex, Word interface (plugin)? • Document indexing for in-text search • Collaborative Code writing ?? • Aggregation (RSS) of web and application data in a structured way • Database .. Denis Perret-Gallix LAPP/IN2P3

  12. High precision • First time in this workshop. • Quadruple/octuple precision is needed. • Correct results. • Faster algorithms. • But software implementations are too slow. • New hardware/software development. Denis Perret-Gallix LAPP/IN2P3

  13. f = 333.75 b6 + a2(11a2b2- b6- 121b4 – 2) + 5.5b8 + a/2b where a=77617.0, b=33096.0. (C. Hu, S. Xu and X. Yang) Quadruple precision result f = 1.1726039400531786318588349045201801 Analytical result = - 54767/66192 f = -0.82739605994682136814116509547981370 New Octuple precision library, H3Lib: f = -0.827396059946821368141165095479816 lost bits = 121 Simple Exampleby J. Fujimoto (kek) Denis Perret-Gallix LAPP/IN2P3

  14. Actual applicationBy J. Fujimoto KEK t Quadruple precision is required in some phase space points due to the Gram determinant mass of happens in the reduction algorithm. mass of photon Denis Perret-Gallix LAPP/IN2P3

  15. Double precision ReJ[1]= -1.49368718239238 ReJ[x] = -6.86111482424926E-0002 ReJ[y] = -6.86785270067264E-0002 ReJ[w] = -1.39799775179174 ReJ[w**2] = - 1.36472026946296 ReJ[w*x] = - 2.708863236843683E-0002 ReJ[x*y] = - 3.048903558925384E-0002 … ReJ[w**3] = 93763.26727997246 … Blow up !! Quadruple precision ReJ[1]=-1.49368718238777512062307539882045 ReJ[x] =-6.861114708877389206553392789958382E-0002 ReJ[y] =-6.867852585600575199171661642779842E-0002 ReJ[w] =-1.39799775496536042464289674154150 ReJ[w**2] = - 1.34746346742190735627641191119128 ReJ[w*x] =-3.334744118868393382280835719751654E-0002 ReJ[x*y] =-2.822377826411337874789947823777159E-0002 … ReJ[w**3] =-1.60389378482142986480454883491878 … Denis Perret-Gallix LAPP/IN2P3 J. Fujimoto

  16. Minimization algorithms, … Single Double Quad. Gambolatin et al. Denis Perret-Gallix LAPP/IN2P3

  17. A "new" dimension in system performance CPU bandwidth (Ghz) Interconnection bandwidth (Ghz) Memory size (Gbytes) Floating point precision (4-32 bytes) Instruction size (64 bits) Denis Perret-Gallix LAPP/IN2P3

  18. Pulling heavy computations !!! Software approaches • High precision libraries quadruple/octuple (Hitatchi) • Double-double, quad-double (Arprec) • Multi-precision lib. (1000 dig and more) • Interval arithmetic • Exact arithmetic (XR, iRRAM) • Linpack double/quad: 30 times slower Hardware development High precision Arithmetic Parallel Processor Yoke HAPPY Denis Perret-Gallix LAPP/IN2P3

  19. XP: eXtreme Programming • Many short cycles: plan-code-test, • frequent releases • Close collaboration: users, programmers, • daily meetings • Standardization • Language • Structure • Interface • naming convention Denis Perret-Gallix LAPP/IN2P3

  20. More involvement of the community, Discussion of innovative ideas, new approaches, contradictory and hot issues, cross-experiments exchange Not only at the next ACAT workshop, but during the next 18-24 months Setting up of a Wiki ACAT web site A page for each working group discussion A repository for notes, presentations, papers related to the ACAT topics, code, … Up-to-date reference list Collaborative writing of the History and trends for some topics ... Security issues ?? Workshop organization Denis Perret-Gallix LAPP/IN2P3

  21. Computing Technology and Environment for Physics Research Parallel and Vector Computing Technologies and Applications Distributed Computing: Tools for the GRID, BOINC, … Data Fabric and Data Management Online Monitoring and Control Software Engineering: eXtreme programming, … Graphic User Interfaces, Common Libraries Communication: web and Wiki’s tools Data Analysis - Algorithms and Tools Neural Networks and Other Pattern Recognition Techniques Evolutionary and Genetic Algorithms, Statistical learning Advanced Data Analysis Environments Statistical Methods Detector and Accelerator Simulations Reconstruction Algorithms Simulations and Computations in Theoretical Physics and Phenomenology Automatic Computation Systems: from Processes to Event Generators Multi-loop Calculations and Higher Order Corrections Multi-dimensional Integration and Event Generators Intensive High Precision Numerical Computations: Algorithms and Systems Computer Algebra Techniques and Applications: Intellectics Quantum Computing Lattice Computing Topical sessions Round-Tables Denis Perret-Gallix LAPP/IN2P3

  22. Next: ACAT 2007 The Netherlands - Amsterdam - Nihkef April 2007, Chair of the organizing committee: Jos Vermaseren The Netherlands - Amsterdam - NIKHEF April 2007, Chair of the organizing committee: Jos Vermaseren Candidates for backup and next-to-next: Switzerland( Zurich), US, France (Annecy), Norway,… Denis Perret-Gallix LAPP/IN2P3

  23. See you at ACAT 07 Amsterdam April 2007 Denis Perret-Gallix LAPP/IN2P3

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