Benchmarks

Unstructured benchmarks

Receive type comparison

Times and bandwidth for the different receive types which are available in the unstructured case:

• UNORDERED: non-contiguous receive halos + buffered receive;
• ORDERED: contiguous receive halos + buffered receive;
• IN-PLACE RECEIVE: contiguous receive halos + in-place receive.

Benchmark details

• Triangular mesh (average node connectivity = 6), 8*10^6 vertices;
• 100 vertical layers;
• 1 field exchanged, of type int_64;
• 50 warm-up exchanges, 50 measured exchanges, results are averaged over measured repetitions, threads and MPI ranks; final results are then averaged over 3 independent simulations.

CPU results

• System: daint-gpu;
• configuration: CPU-only, 1 rank per node, 12 threads per rank, 1 local domain per thread;
• transport layer: MPI
• thread type: std::thread

GPU results

• System: daint-gpu;
• configuration: 1 rank per node, 1 thread per rank, 1 local domain per rank;
• transport layer: MPI