Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Optimization of an electromagnetics code with multicore wavefront
  diamond blocking and multi-dimensional intra-tile parallelization   Understanding and optimizing the properties of solar cells is becoming a key
issue in the search for alternatives to nuclear and fossil energy sources. A
theoretical analysis via numerical simulations involves solving Maxwell's
Equations in discretized form and typically requires substantial computing
effort. We start from a hybrid-parallel (MPI+OpenMP) production code that
implements the Time Harmonic Inverse Iteration Method (THIIM) with
Finite-Difference Frequency Domain (FDFD) discretization. Although this
algorithm has the characteristics of a strongly bandwidth-bound stencil update
scheme, it is significantly different from the popular stencil types that have
been exhaustively studied in the high performance computing literature to date.
We apply a recently developed stencil optimization technique, multicore
wavefront diamond tiling with multi-dimensional cache block sharing, and
describe in detail the peculiarities that need to be considered due to the
special stencil structure. Concurrency in updating the components of the
electric and magnetic fields provides an additional level of parallelism. The
dependence of the cache size requirement of the optimized code on the blocking
parameters is modeled accurately, and an auto-tuner searches for optimal
configurations in the remaining parameter space. We were able to completely
decouple the execution from the memory bandwidth bottleneck, accelerating the
implementation by a factor of three to four compared to an optimal
implementation with pure spatial blocking on an 18-core Intel Haswell CPU.

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The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
21
The categories of this paper are: adap-org
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The categories of this paper are: comp-gas
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
6
The categories of this paper are: astro-ph
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The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
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The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
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The categories of this paper are: quant-ph
5
The categories of this paper are: gr-qc
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-lat