Experience many-core architectures at CASPUR: developing biochemistry application on Microsoft HPC 2008 environment
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1 Experience many-core architectures at CASPUR: developing biochemistry application on Microsoft HPC 2008 environment Nico Sanna Manager of HPC Support Group in (Bio)Chemical-Physics
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3 CASPUR Numeric Simulation Science Technology Database (experiment) S = f (..,..,T,..,..)
4 CASPUR Computational fields Computational Physics Computational Chemistry Computational Biology Computational Fluid-Dynamics Applied Mathematics Computational Material Science
5 HPC Computational (bio)-chemical-physics Quantum Chemistry WaveFunction Methods Density Functional (DFT) Methods Molecular Dynamics Classical MD Molecular Modeling Atomic & Molecular Physics E-mol scattering DNA Radiation Damage Data mining / warehousing Genome/Protein databases Microarray Experiment databases
6 Beyond ( with) multi-core? Many-core computing could be an alternative Accelerating co-processors become to be viable solutions to intensive computing Exploit GPU (&FPGA) computing at its best
7 Beyond ( with) multi-core? Reproduced w/ permission of Prof. E. Stahlberg
8 project
9 project
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12 Ionizing radiation Radiation Damage: effect of the secondary species X rays γ rays α particles β particles Neutrons Cosmic rays R R * e- M + Living tissue The genotoxic effects, due to various DNA lesions, are not only produced by the direct impact of the initial high energy particles (direct ionization) Role of SECONDARY SPECIES: excited atoms and molecules, radicals, ions, low-energy electrons (LEEs) 1 ev < E < 20 ev (the most abundant, carrying most of the energy of the initial radiation)
13 U
14 GTGATAGAG e - SCELib2 + VOLSCAT Cross Sections & Resonances E 1 E 2 E 3 High Intensity Resonances T A G T G A T A G A G Low Intensity Resonances
15 The SCELib Package The SCELib package: study of e-/p+ scattering from molecular targets. N. Sanna, & F. A. Gianturco, Comp. Phys. Comm. 128(2) (2000) 615 N. Sanna & G. Morelli, Comp. Phys. Comm. 162(1) (2004) 51 N. Sanna, I. Baccarelli & G. Morelli, Comp. Phys. Comm. 180, 2544 (2009)
16 The SCE part of SCELib: implementation on the GPUs Multi centered Basis Functions Multi centered Molecular Orbitals Single centered Molecular Orbitals our target in electron-molecule scattering
17 Current implementation of SCELib 3.0 on GPUs SCE algorithm 1) Primitive GTO mapping 2) MOs Single Center Expansion
18 The GPU implementation of SCELib3.0: nvidia GPGPUs GPU Processor Memory System Clock Bandwidth G GHz 64 GB/s PC Asus Quadro G80GL 1.51 GHz 76.8 GB/s nvidia Tesla C GHz GB/s Dell5400
19 SCELib3.0 performance on GPUs - optimal parameters (warp size, arrays dimension in constant memory). Still work in progress scalability for CH 4 with respect to the number of grid points Execution time (in msec) and speed-up with respect to Host SPP calculation
20 SCELib3.0 performance on GPUs scalability for CH 4 with respect to the number of primitive GTOs G9800 Speed-up with respect to Host SPP calculations
21 SCELib3.0 performance on GPUs scalability with respect to the type of molecular system
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