Tài liệu High Performance Computing on Vector Systems-P3 ppt

Tài liệu High Performance Computing on Vector Systems-P1 pdf

... automatically indicates the location of the fault and an au-tomatic reconfiguration function releases the faulty component and continuessystem operation. In addition to the functions above, prompt fault ... Promotion Division,1-10, Nisshin-cho, Fuchu, Tokyo, Japan,4NEC High Performance Computing Europe GmbH,Prinzenallee 11, D-40549 Düsseldorf, GermanyAbstract In 2003, the High Performance Computing ... channels (2 Gbps) for the connection of thelatest, highly reliable, high performance peripheral devices such as RAID disks.FC offers the advantages of connectivity to newer high performance RAID stor-age...

Tài liệu High Performance Computing on Vector Systems-P2 pptx

... thread synchronisation),yielding low performance on small domains and saturation at high performance on large domains. For the pipeline-parallel (SGI Altix) 3-D implementationa maximum performance ... calculation of the coeﬃcientsand source terms of the linearized conservation equations.• The second class of loops occurs in the calculation of boundary conditions.Owing to the restriction to ... and peak performance for full-scale scientiﬁc applications on suchplatforms has become major concern in high performance computing. The latest gener-ation of custom-built parallel vector systems...

Tài liệu High Performance Computing on Vector Systems-P3 ppt

... equilibrium condition, the conventional Fermi-Golden rule dealingthe electron-phonon coupling thus does not work. Under such a non-equilibriumcondition, the real-time propagation must be treated ... 120-billion-dimensional Hamiltonianmatrix on 512 nodes. To our knowledge, this size is the largest in the history ofthe exact diagonalization method of Hamiltonian matrices.6 ConclusionsThe best performance, ... picoseconds. The earlier decay is interpretedas electron-electron coupling while the slower one is interpreted as electron-phonon coupling. These measurements were, however, done with samples con-taining...

Tài liệu High Performance Computing on Vector Systems-P4 pdf

... good portion of the theoretical peak performance on the vector machine. Block operations are not only eﬃcient on vector systems, but also on scalar architectures [9]. The results of matrix vector multiplication ... machines because they lead to long vector lengths. Block computationsare necessary to achieve a good portion of peak performance not only on vector machines, but also on most of the superscalar ... than conventional scalar processors. Vectorization exploitsregularities in the computational structure to accelerate uniform operations on independent data sets. Vector arithmetic instructions...

Tài liệu High Performance Computing on Vector Systems-P5 doc

... contains many integer operations and non-vectorized if-branches,whereas the flow solution procedure has a simple code structure, is well vector- ized and contains only floating point operations.The ... separate OFA has only a minoreffect on the NOx-emission.In order to work on this combustion optimization problem in virtual reality,a high- resolution boiler model with 1 million grid points was ... Helicopter 1358 Performance on NEC SX-8 Vector ComputerIn spring 2005 the next generation vector computer NEC SX-8 was installed asthe successor of the NEC SX-6 at the High Performance Computing...

Tài liệu High Performance Computing on Vector Systems-P6 pdf

... SX6+the performance increases subproportionally beyond 6 CPUs. For the Γ -pointonly version, the scaling degrades beyond 4 CPUs, but this version is still fasterthan the full version. If only ... optimizations throughrelaxation simulations are possible. In all cases, k-space was sampled at theΓ -point only. Two VASP versions were used: a full complex version and a spe-cialized Γ -point only ... mechanical processes, like dis-location motion, crack propagation, or nano-indentation would at least requiremulti-million atom systems. Such simulations are possible only with classicaleﬀective potentials....

Tài liệu High Performance Computing on Vector Systems-P7 pdf

... region. Only the molecule positions ofthe “halo” molecules have to be communicated, which is done in 3 consecutivesteps: first x, then y and final the z direction. The diagonal directions are doneimplicitly ... non-linear systemof algebraic equations, which is solved by Newton-Raphson iteration with explicitconstruction and inversion of the corresponding Jacobian matrix.Inversion of the JacobiansThe Jacobians ... thecenter of the cell on the ray connecting the center of the cell and the parti-cle’s true position. As soon as the precondition is satisfied the virtual positionsare discarded. Only the now compliant...

Tài liệu High Performance Computing on Vector Systems-P8 pptx

... DiscretizationAs we use a conservative formulation, convective terms are discretized as oneterm to better restrain conservation equations. Viscous terms are expanded be-cause computing the second ... the conservative variables Q.2.5 Boundary ConditionsThe modular concept for boundary conditions allows the application of the codeto a variety of compressible ﬂows. Each boundary condition can ... caused high communication costs.Therefore domain decomposition takes place in the ξ-η plane. The arbitrary do-main conﬁguration in combination with grid transformation, allows computa-tions for...

Tài liệu High Performance Computing on Vector Systems-P9 pdf

... eigenfunctions from linear stability theory(see Sect. 4.3) in accordance with the characteristic boundary condition. One-dimensional characteristic boundary conditions posses low reﬂection coeﬃcientsfor ... and supersonicTo increase the performance for three-dimensional simulations, we plan toimplement the FFT routines installed on the NEC SX-8 machine. As commu-nication is not depending on spanwise ... the tridiagonal equationsystem is not the major part of computation.If we extend the simulation to the three-dimensional case, Microtasking, thesecond branch of the parallelization, is applied....

Tài liệu High Performance MySQL pdf

... don’t require, attribution. An attribution usually includes thetitle, author, publisher, and ISBN. For example: High Performance MySQL: Optimi-zation, Backups, Replication, and More, Second ... are somehighlights from the roadmap:• The option of either transactional or nontransactional storage, on a per-tablebasis• Crash recovery, even when a table is running in nontransactional mode• ... transaction starts. You can set the isola-tion level for the whole server in the configuration file (see Chapter 6), or just foryour session:mysql> SET SESSION TRANSACTION ISOLATION LEVEL...

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