Low GPU usage and FPS with EGPUs

[gipawu]

Your system information

• System information from steam (Steam -> Help -> System Information) in a gist:

• Have you checked for system updates?: [Yes/No] Yes
• Are you using the latest stable video driver available for your system? [Yes/No] Yes
• Have you verified the game files?: [Yes/No] Yes

Please describe your issue in as much detail as possible:

It seems that Dota 2 (and and to a lesser extent Counter Strike 2 - so I think all Source 2 based games) manifests the same problem of low GPU usage and thus low FPS present in DXVK described here.
I found that with DXVK using the d3d11.cachedDynamicResources=a option solves the problem. The description of the option, taken directly from the DXVK example configuration file mentions the following:

Allocates dynamic resources with the given set of bind flags in cached system memory rather than uncached memory or host-visible VRAM, in order to allow fast readback from the CPU. This is only useful for buggy applications, and may reduce GPU-bound performance.
Supported values: Any combination of the following:

• v: Vertex buffers
• i: Index buffers
• c: Constant buffers
• r: Shader resources
• a: All dynamic resources

I think the problem in Dota 2 is similar to what is present in DXVK. Is there a command-line or console parameter equivalent to what is present in DXVK, or is it possible to implement it somehow? Thank you.

Steps for reproducing this issue:

1. Play a game with a EGPU
2. See low GPU usage and FPS