Tài liệu High Performance Computing on Vector Systems-P2 pptx

Tài liệu High Performance Computing on Vector Systems-P1 pdf

... parallelization, partial and condi-tional vectorization, index migration, loop collapsing, nested loop vectorization,conversions, common expression elimination, code motion, exponentiation opti-mization, ... opti-mization, optimization of masked operations, loop unrolling, loop fusion, inlinesubroutine expansion, conversion of division to multiplication and instructionscheduling.Compiler options and directives ... (Eds.) High Performance Computing on Vector SystemsPlease purchase PDF Split-Merge on www.verypdf.com to remove this watermark.ContentsFuture Architectures in SupercomputingThe NEC SX-8 Vector...

Tài liệu High Performance Computing on Vector Systems-P2 pptx

... applications on suchplatforms has become major concern in high performance computing. The latest gener-ation of custom-built parallel vector systems have the potential to address this concernfor ... Split-Merge on www.verypdf.com to remove this watermark. Performance Evaluation of Lattice-BoltzmannMagnetohydrodynamics Simulations on Modern Parallel Vector SystemsJonathan Carter and Leonid OlikerNERSC/CRD, ... architecturalapproach than conventional cache-based systems. Vectorization exploits regular-ities in the computational structure of scientiﬁc applications to expedite uniformoperations on independent data...

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 ... electronic excitations [5]. In addition to the‘real-time propagation’ of electrons [4], we treat ionic motion within Ehrenfestapproximation [6]. Since ion dynamics requires typical simulation ... relaxation ofone electron of state ‘A’ into O 1s core state, and emission of the other electron of state‘A’ into vacuum. (b) Snap shots of spontaneous O-emission from carbon nanotubes.Directions...

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 ... iterativesolvers on vector machines. The most important kernel operation of any iterativesolver is the matrix vector multiplication. We shall look at the eﬃciency of thisoperation, especially on vector...

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 ... 50 iterations of the flow solver were performed in order toconverge the dual-time stepping method.The simulation was executed on the NEC SX-6 vector computer at the High Performance Computing ... ConclusionsA time-accurate Navier-Stokes simulation of a BO-105 helicopter wind tunnelmodel has been presented. The computations considered forward flight condi-tions at 60 m/sec. The motion...

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 ... inletboundary conditions can be found in [10]. For elbow draft tube two grids wereused (180000 and 1 million elements). Computational grid and the inlet boundaryconditions (part load operational point ... trifurcation –vortex position in the branch 3prescribed by the turbines. In the simulation, however, a free outﬂow boundarycondition is applied which leads to the higher discharge variations. For...

Tài liệu High Performance Computing on Vector Systems-P7 pdf

... leads to a non-linear systemof algebraic equations, which is solved by Newton-Raphson iteration with explicitconstruction and inversion of the corresponding Jacobian matrix.Inversion of the ... 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 ... advection equa-tions for the electron fraction and the chemical composition of the fluid, andformulated in spherical coordinates;• the Poisson equation for calculating the gravitational source...

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 ... H.T., Mönchmeyer, R.: Anisotropic neutrino emission from rotating pro-toneutron stars. Astron. Astrophys. 209 (1989) L5–L820. Janka, H.T., Mönchmeyer, R.: Hydrostatic post bounce configurations...

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 ... x-andy-direction is used. In stream-wise direction the grid is uniform with spacing Δx =0.157 up to the spongeregion where the grid is highly stretched. In normal direction the grid is contin-uously ... 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 ... simple que-ries per second on commodity server hardware and over 2,000 queries per second158|Chapter 4: Query Performance Optimizationfrom a single correspondent on a Gigabit network, so ... outside fair use or the permission givenabove, feel free to contact us at permissions@oreilly.com.Safari® Books OnlineWhen you see a Safari® Books Online icon on the cover of yourfavorite technology...

Xem thêm