Fresh Arch Linux Benchmarks Of AMDGPU & AMDGPU-PRO

Phoronix reader "Darkbasic" who many of you know from the forums and some of his past benchmarks has shared with us his latest numbers when testing the open-source AMDGPU+RadeonSI stack on Arch Linux as well as when using the AMDGPU-PRO hybrid driver. Enjoy!

I used latest Arch testing + lcarlier repository. I had to downgrade xorg-server to 1.18 to be able to use amdgpu-pro, otherwise I used 1.19 with the FOSS stack.

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The first one is a benchmark of an RX 470 using the FOSS driver and amdgpu-pro (which I tested with mainline kernel 4.10, amd-staging-4.7 -the DAL branch-, mainline 4.7 and 4.7 + the proprietary amdgpu-pro DKMS). amdgpu-pro didn't work very well with kernel 4.10, but both amd-staging-4.7 and mainline 4.7 were as fast as the proprietary DKMS. Unfortunately only with the proprietary DKMS the amdgpu-pro driver was able to run Deus Ex Mankind Divided.

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The second one is a benchmark of an HD 7950 using the radeon kernel driver, the new amdgpu kernel driver and amdgpu-pro with the proprietary dkms on top of kernel 4.7. Dota2 didn't run with pro+dkms, so I used pro+staging-4.7 instead. From my previous tests amd-staging-4.7 was as fast as the proprietary dkms with amdgpu-pro.

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The third one is a test about cpu limiting. I wanted to know how cpu limited were your previous tests in the 31-Way NVIDIA GeForce / AMD Radeon Linux OpenGL Comparison. So I heavily overclocked the fastest CPU available for gaming and I benchmarked against your results. I did it for both the RX 470 and the HD 7950 (for which I used the radeon driver, since that's what you used). The results are very interesting: in the vast majority of tests my cards were *WAY* faster, but in the most demanding ones your RX 470 was a bit faster, probably because it's factory overclocked. This test clearly shows which benchmarks are cpu limited and which ones aren't.

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In the last test I wanted to know how helpful would have been Vulkan (radvd in my case) with such a powerful CPU. So I tested both dota 2 and the talos principle at 1080p and 4K (both opengl and vulkan). Interestingly even at 4K talos principle with Radvd is faster than OpenGL! If I recall correctly in your previous tests it wasn't faster than opengl at 4K: did radvd improve in the meantime or did the faster cpu help radvd more than opengl?

More of his past benchmark results can be found on his personal blog at LinuxSystem.it.