GL_vs_VK: A Micro-Benchmark Looking At The Overhead Of OpenGL vs. Vulkan APIs

[gurv]

Exactly, furthermore results are similar to what I see on my PC: radeonsi + amdgpu lags behind nvidia by about 20% in cpu overhead.
I was also surprised to see amdgpu have its importance as far as cpu overhead is concerned: I get significantly worse performance with amd-staging kernel 4.11 vs mainline 4.12

Replying to myself: nevermind, I checked again and the difference between the two kernels is irrelevant.
The performance delta I observed was caused by the inconsistent performance of the game itself, not by the kernel.

[marek]

gurv, it might have been random behavior of the memory manager. It should be obvious with the Gallium HUD.

[andrei_me]

Michael a cpu utilization graph would be a nice touch to the article