EDGE uses XML-files for build- and runtime-configurations. Using XML-input for building EDGE through --xml=[...] is optional. All build arguments might also be passed to SCons directly. In contrast, passing XML-input for the runtime configuration through -x [...] is mandatory. Except for the verbose flag -v, no other command-line arguments are accepted.


The following shows an overview of all XML-nodes in EDGE. Dependent on the build-type, only a subset of the nodes is active. For example, a given velocity model (<velocity_model>) is only parsed for seismic problems. The comment <!-- [...] --> indicates, that a node is allowed to appear multiple times in the XML-tree.



        <!-- [...] -->

      <!-- [...] -->

        <!-- [...] -->



        <!-- [...] -->



The node <edge> is the root of both, the runtime- and the build-configuration.


The node <build> describes the build-configuration and is only used by SCons. EDGE also parses <build> at runtime, however the information is only logged and does not influence runtime behavior.

Attribute Allowed Values Description
cfr 1, 2, 4, 8, 12, 16 Number of concurrent/fused forward runs. 1, 4, 8, and 16 are typically used.
equations advection, elastic, elastic+rupture, swe Equations solved. advection: advection equation, elastic: elastic wave equations with kinematic sources, elastic+rupture: elastic wave equations with solver for rupture physics at internal boundaries, swe: shallow water equations.
element_type line, quad4r, tria3, hex8r, tet4 Element type used for spatial discretization. line: line elements, quad4r: 4-node, rectangular quadrilaterals, tria3: 3-node triangles, hex8r: 8-node, rectangular hexahedrons, tet4: 4-node tetrahedrons.
order 1, 2, 3, 4, 5, 6, 7, 8, 9 Convergence rate of the solver. 1: Finite volume solver (P0 elements), 2-9: ADER-DG solver (P1-P8 elements).
mode release, debug, release+san, debug+san Compile mode. release: fastest option for use in production configurations, debug: debug flags and disabled optimizations, release+san (gnu and clang): same as release, but with enabled undefined behavior and address sanitizers, debug+san (gnu and clang): same as debug, but with enable undefined behavior and address sanitizers.
arch host, snb, hsw, knl Targeted architecture. host: uses the architecture of the machine compiling the code, snb: SandyBridge, hsw: Haswell, knl: KnightsLanding.
precision 32, 64 Floating point precision in bit. 32: single precision arithmetic, 64: double precision arithmetic.
parallel none, omp, mpi, mpi+omp Shared and distributed memory parallelization. none: disabled, omp: OpenMP only, mpi: MPI only, mpi+omp: hybrid parallelization with MPI and OpenMP.
cov yes, no Support for code coverage reports.
tests yes, no Unit tests. yes: builds unit tests in the separate binary tests.
build_dir /path/to/build_dir Path to the build-directory. Temporary files and the final executable(s) are stored in the build-directory.
xsmm yes, no, path/to/xsmm LIBXSMM support. Available only for ADER-DG and elastics.
zlib yes, no, path/to/zlib zlib support.
hdf5 yes, no, path/to/hdf5 hdf5 support.
netcdf yes, no, path/to/netcdf NetCDF support.
moab yes, no, path/to/netcdf MOAB support. If MOAB is enabled, EDGE is build with support for unstructured meshes. If disabled, EDGE is build with support for regular meshes.
inst yes, no EDGE's high-level code instrumentation through the Score-P library.

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