Single Schwarzschild black hole

This is a benchmark suite which solves the single black hole (schwarzschild black hole) described in a ExaGRyPE simulation. While the output is not particularly exciting (the simulation should yield a stationary solution after a while), it is numerically challenging as we have sophisticated boundary condition effects, a singularity in the centre which can lead to oscillations, need a scheme with low numerical dissipation, and have highly varying spatial resolution needs, i.e. need a fine resolution around the black hole, while we can keep the mesh coarse far away .

The suite of benchmarks serves two purposes: On the one hand, it evaluates the impact of various algorithmic flavours of the code:

• with AMR vs a regular mesh;
• using one solver only or a combination of two solvers;
• different multicore tasking strategies.

On the other hand, it hosts a few standard "production" runs, which can serve as baseline applications for larger runs.

Prior to benchmarking this setup, we recommend that you should ensure that Benchmarks of Compute Kernels of CCZ4 and the CCZ4 Gauge Wave complete successfully. One assesses the computational efficiency for various kernel variants over different platforms, and the other validates the numerical accuracy of the overall solver assembly (convergence orders).

• Generic settings
• Production-type benchmarks
• HPC assessment benchmarks
• Benchmark implementation