Vulkan vs. OpenGL Linux Game CPU Core Scaling
Mad Max at least in the initial scene saw a huge performance increase from two to three threads while the Vulkan performance was flatlined.
While with the stronghold scene, there was actually scaling up to eight threads and this was a scene where Vulkan's performance was faster.
With "Hope, Glory, and Dog is Dead", OpenGL was faster only with 3+ CPU threads. Mad Max was another game where when using OpenGL the game would hang seemingly indefinitely at the loading screen when having just one CPU core enabled.
Continuing, the Vulkan results show very little scaling when the additional CPU cores are activated, likely due to more of the work to the GPU but the RADV driver work that it does do on the CPU doesn't appear to be threaded.