[Mesa-users] AMD Radeon Rx 580 on Linux is slow

[Benjamin Bellec]

Hello,

I can't help much, but is this possible to get a binary of your program to
compare on other computer ?
Mine is RX 570, i5-2500K, Fedora 29 (DRM 3.26.0, 4.18.17-300.fc29.x86_64,
LLVM 7.0.0, Mesa 18.2.4).

Le sam. 15 déc. 2018 à 13:15, Jean-Dominique Frattini <dagecko83 at gmail.com>
a écrit :

> Good Morning,
>
> I am looking for some help to find what could cause poor performances with
> an AMD RX 580 graphic card on Linux.
>
> First, what I am doing is rendering a scene about 74k triangles. Since I
> got weird results, I did some tests to change how triangles are sent to GL.
> Tests have been made with doing a single draw call with many triangles,
> splitting a lot these draw calls (sending about 18k draw calls to GL), or
> using glMultiDrawElements to regroup the many draw calls into a single
> call. With these 3 methods I have almost the same result. Note that these
> tests have been made using an own development project (closed-source).
>
> I run this same tests on 4 different platforms:
> P1: AMD Ryzen 7 1800X + AMD Rx 580 8 GB (free drivers) - Debian 10
> P2: Intel Core I5 8300H + nVidia Geforce GTX 1060 6GB (nvidia drivers) -
> Debian 10
> P3: AMD FX 4170 + nVidia Geforce GTX 560 (nvidia drivers) - Debian 8
> P4: Intel Atom Z36xxx (free drivers) - Debian 9
>
> On P1, I reach about 67 images per second, a frame takes approximately 11
> ms to be rendered, and could vary from 10 to 15 generally.
> On P2, I reach about 240 images per second, a frame will take
> approximately between 4 and 5 ms to be rendered.
> On P3, I reach about 96 images per second, a frame will take approximately
> 10 ms to be rendered, and could vary from 7 to 11 ms generally.
> On P4, I reach about 9 images per second, a frame will take approximately
> between 100 and 110 ms.
>
> On all systems vsync had been disabled.
>
> glxgears tests reveal that P1 is still slower than P2 and P3 (vsync
> disabled):
>
> P1: average of 12800 FPS
> P2: average of 17200 FPS
> P3: average of 14200 FPS
> P4: average of 3300 FPS
>
> More information about P1:
> OS: Debian Linux 10 (testing)
> firmware for AMDGPU is up-to-date from Debian 10
> OpenGL renderer: Radeon RX 580 Series (POLARIS10, DRM 3.26.0,
> 4.18.0-3-amd64, LLVM 7.0.1)
> OpenGL vendor: X.Org
> OpenGL version: 4.5 (Core Profile) Mesa 18.2.6
> OpenGL Shading Language version: 4.50
>
> Some more notes: building with or not debug do not show any differences
> for P1 (not actually tested on other platforms). I also tried to disable
> OpenGL debug extension, but I still have the same results. I also moved my
> CPU scaling from on-demand to performance, but this also did not change
> things, so I believe I am not CPU-bounded.
>
> Any help would be appreciated. Please don't hesitate to ask for anything
> you would believe relevant (dmesg outputs...) if you think this is
> necessary.
>
> Thanks.
>
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>
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