RadeonSI Performance For Civilization VI On Linux With Mesa 17.1 + 4.10 Kernel
With the lowest quality settings at 1080p we find that the RadeonSI performance is around half that of the NVIDIA driver. NVIDIA already had a tough time with this game running at about 60 FPS (there's no vsync / frame-limiting enabled) as the game's Linux port is rather CPU heavy. With the RadeonSI testing from Mesa 17.1 Git and using the Radeon/AMDGPU DRM from Linux 4.10, the performance was at 31 FPS.
The best frame times / lowest latency with RadeonSI were generally around the average frame-times when running the GeForce cards with the NVIDIA proprietary driver.