The PARKBENCH benchmark suite comprises codes that vary from low-level benchmarks measuring basic machine parameters, through important application kernels, to compact research applications. This hierarchical structure allows information derived from the simpler codes to be used in explaining the performance characteristics of the more complicated codes. Thus the benchmark suite can be used to evaluate performance on a range of levels from simple machine parameters to full applications where effects due to non-parallelisable sections of code, and memory, communication or I/O bottlenecks may become important.