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    • UVaFTLE: Lagrangian finite time Lyapunov exponent extraction for fluid dynamic applications
    Authors: Rocío, Carratalá-Sáez; Yuri, Torres; José, Sierra-Pallares;  Advisor: -;  Co-Author: - (2023)

    The determination of Lagrangian Coherent Structures (LCS) is becoming very important in several disciplines, including cardiovascular engineering, aerodynamics, and geophysical fluid dynamics. From the computational point of view, the extraction of LCS consists of two main steps: The flowmap computation and the resolution of Finite Time Lyapunov Exponents (FTLE). In this work, we focus on the design, implementation, and parallelization of the FTLE resolution. We offer an in-depth analysis of this procedure, as well as an open source C implementation (UVaFTLE) parallelized using OpenMP directives to attain a fair parallel efficiency in shared-memory environments. We have also implemented CUDA kernels that allow UVaFTLE to leverage as many NVIDIA GPU devices as desired in order to rea...
    • EPSILOD: efficient parallel skeleton for generic iterative stencil computations in distributed GPUs
    Authors: Manuel de, Castro; Inmaculada, Santamaria-Valenzuela; Yuri, Torres;  Advisor: -;  Co-Author: - (2023)

    Iterative stencil computations are widely used in numerical simulations. They present a high degree of parallelism, high locality and mostly-coalesced memory access patterns. Therefore, GPUs are good candidates to speed up their computation. However, the development of stencil programs that can work with huge grids in distributed systems with multiple GPUs is not straightforward, since it requires solving problems related to the partition of the grid across nodes and devices, and the synchronization and data movement across remote GPUs. In this work, we present EPSILOD, a high-productivity parallel programming skeleton for iterative stencil computations on distributed multi-GPUs, of the same or different vendors that supports any type of n-dimensional geometric stencils of any order...