There's Finally A Decent Vulkan Ray-Tracing Benchmark
Developer Tanguy Fautre has been working on "RayTracingInVulkan" as some basic Vulkan ray-tracing tests originally for NVIDIA's RTX Vulkan extensions and now working for the Vulkan KHR ray-tracing support. RayTracingInVulkan was pointed out to me a few days ago and is hosted at GitHub.
Besides being open-source, RayTracingInVulkan is automated test friendly and has fit the requirements for my purposes -- so I added it to the Phoronix Test Suite and OpenBenchmarking.org.
NVIDIA RTX hardware pays off (obviously) for the Vulkan ray-tracing work.
More of the benchmark results collected so far and other tests on RayTracingInVulkan as a benchmark can be found via the OpenBenchmarking.org test page. Once the AMD Vulkan Linux drivers begin supporting the Vulkan RT extensions as well as Xe HPG surfacing with its ray-tracing support it will make for some fun benchmarking. Hopefully by then we see greater benchmark-friendly Vulkan ray-tracing exposure on Linux too. Those with a supported graphics card today can run phoronix-test-suite benchmark rtiv to see how your performance compares.