Tài liệu High Performance Computing on Vector Systems-P3 ppt

... automatically indicates the location of the fault and an au- tomatic reconfiguration function releases the faulty component and continues system operation. In addition to the functions above, prompt fault ... Promotion Division, 1-10, Nisshin-cho, Fuchu, Tokyo, Japan, 4 NEC High Performance Computing Europe GmbH, Prinzenallee 11, D-40549 D¨usseldorf, Germany Abstract In 2003, the High...

Ngày tải lên: 15/12/2013, 13:15

... thread synchronisation), yielding low performance on small domains and saturation at high performance on large domains. For the pipeline-parallel (SGI Altix) 3-D implementation a maximum performance ... calculation of the coefficients and source terms of the linearized conservation equations. • The second class of loops occurs in the calculation of boundary conditions. Owing to the...

Ngày tải lên: 24/12/2013, 19:15

... equilibrium condition, the conventional Fermi-Golden rule dealing the electron-phonon coupling thus does not work. Under such a non-equilibrium condition, the real-time propagation must be treated ... 120-billion-dimensional Hamiltonian matrix on 512 nodes. To our knowledge, this size is the largest in the history of the exact diagonalization method of Hamiltonian matrices. 6 Conclusions Th...

Ngày tải lên: 24/12/2013, 19:15

... 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 computations are necessary to achieve a good portion of peak performance not only on vector machines,...

Ngày tải lên: 24/12/2013, 19:15

... 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 minor effect 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...

Ngày tải lên: 24/12/2013, 19:15

... SX6+ the performance increases subproportionally beyond 6 CPUs. For the Γ -point only version, the scaling degrades beyond 4 CPUs, but this version is still faster than the full version. If only ... optimizations through relaxation simulations are possible. In all cases, k-space was sampled at the Γ -point only. Two VASP versions were used: a full complex version and a spe- cialized Γ -poin...

Ngày tải lên: 24/12/2013, 19:15

... region. Only the molecule positions of the “halo” molecules have to be communicated, which is done in 3 consecutive steps: first x, then y and final the z direction. The diagonal directions are done implicitly ... non-linear system of algebraic equations, which is solved by Newton-Raphson iteration with explicit construction and inversion of the corresponding Jacobian matrix. Inversion of the J...

Ngày tải lên: 24/12/2013, 19:15

... Discretization As we use a conservative formulation, convective terms are discretized as one term to better restrain conservation equations. Viscous terms are expanded be- cause computing the second ... the conservative variables Q. 2.5 Boundary Conditions The modular concept for boundary conditions allows the application of the code to a variety of compressible flows. Each boundary conditio...

Ngày tải lên: 24/12/2013, 19:15

... eigenfunctions from linear stability theory (see Sect. 4.3) in accordance with the characteristic boundary condition. One- dimensional characteristic boundary conditions posses low reflection coefficients for ... and supersonic To increase the performance for three-dimensional simulations, we plan to implement the FFT routines installed on the NEC SX-8 machine. As commu- nication is not depe...

Ngày tải lên: 24/12/2013, 19:15

... don’t require, attribution. An attribution usually includes the title, author, publisher, and ISBN. For example: High Performance MySQL: Optimi- zation, Backups, Replication, and More, Second ... are some highlights from the roadmap: • The option of either transactional or nontransactional storage, on a per-table basis • Crash recovery, even when a table is running in nontransactional mo...

Ngày tải lên: 10/12/2013, 06:15