eduardo copy/paste from the link... So you know your GPU drivers don't support this experimental feature but still you enable them and then you wonder why you get this error message ?
Vulkan: Added experimental option to enable asynchronous compilation of shaders and pipelines
This option trades stutter vs emulation accuracy
--- Details ---
When enabled, uncached shaders and pipelines will be compiled asynchronously in the background
While a pipeline is compiling, all drawcalls for it will be skipped, leading to missing or broken graphics for a period of time
Since Wii U's GPU is a GPGPU, not all drawcalls can be skipped without causing gameplay bugs or persistent graphic artifacts
To deal with this problem Cemu includes speculative logic to identify essential shaders that must not be skipped
These shaders will always be compiled synchronous and will still introduce stutter
False negatives are possible and long lasting graphic bugs can occur when async compilation is used
Per default this option is disabled. It can be toggeled in the menu under debug -> experimental
It will only work if VK_EXT_pipeline_creation_cache_control is supported by the graphics driver
As of writing this, the required Vulkan extension (VK_EXT_pipeline_creation_cache_control) is only supported by:
Nvidia Vulkan 1.2 beta drivers (442.75 - 443.09)
AMD optional drivers (Radeon Software Adrenalin 2020 Edition 20.3.1 or higher)
On a personal note, we consider this feature a hack due to the unreliable and workaround-like nature
But we also understand that stutter-free gameplay is often more important than having accurate rendering
In the (far) future, we will introduce additional methods to reduce shader stutter without sacrificing accuracy
