RadeonSI Compute Shaders Land In Mesa Git

[geearf]

I've updated to today's mesa-git, but I can't see compute shader in glxinfo, even with a 4.3 override, is it supposed to show there?

Pretty please?
(I have llvm-svn as well)

[haagch]

Without the override it should still say

glxinfo -s | grep -i compute
GL_ARB_compute_shader
GL_ARB_compute_shader

edit: But I do wonder what's wrong. I just tried linus' git kernel with this patch applied https://cgit.freedesktop.org/~agd5f/...fed19d53afab21 and compute shaders are disabled on it.

With drm-next-4.7 compute shaders work...

[nadro]

After drivers update (Padoka PPA) I checked SoM, but it looks like compute shaders doesn't work on my config too (GL_ARB_compute_shader extension is marked as available by glxinfo). I use stock Gnome Ubuntu 16.04 + Padoka PPA. Do you know if full compute shaders support is already available via this PPA?

[nadro]

SoM requires OpenGL 4.3. Current Mesa-git radeon driver reports only OpenGL 4.2 because of GLSL. Try:

MESA_GLSL_VERSION_OVERRIDE=430 steam.sh

Thanks, it works fine at now

I have some results from SoM (Radeon 380 2GB, 1920x1080 + custom settings, however mostly set at high + tesselation on):

[Windows 10 + Catalyst 15.9]
Min: 36
Avg: 84
Max: 168

[Gnome Ubuntu 15.04 + Catalyst 15.9]
Min: 11
Avg: 20
Max: 38

[Gnome Ubuntu 16.04 + Padoka PPA]
Min: 12
Avg: 25
Max: 54

It looks like oss drivers works better than Catalyst for SoM at Linux, however results from Windows 10 and Gnome Ubuntu 15.04 are few months old, so I'm not sure if oss drivers are better or just Feral posted a patch. Anyway if we compare those results to Windows it looks like this port is really bad... Eg. in The Witcher 2 with oss drivers on Linux I have 80% of Windows performance...

[geearf]

Without the override it should still say

glxinfo -s | grep -i compute
GL_ARB_compute_shader
GL_ARB_compute_shader

I see, strange:

$glxinfo -s | grep -i compute
$

Well now I know to look into a bit more, thanks!


Actually I see you in the bbs, do you use lordheavy's repo to get your mesa-git?
If so that would mean that the issue lies in my system and not the packages... is there any new package needed to install?

[geearf]

lordheavy figured it out, with my card I need alex' wip kernel branch, with that I get compute shaders working!
Now onto finding something that actually uses them.

[geearf]

I've been playing a bit of Mordor, and it plays fine on Ultra.... not sure what my fps are, but since it seems good enough I have not checked.
I did not expect that at all..

[tomtomme]

I've been playing a bit of Mordor, and it plays fine on Ultra.... not sure what my fps are, but since it seems good enough I have not checked.
I did not expect that at all..

your specs please. I need to decide if I buy the game for my radeonSI HD7950 system.

[geearf]

280x (so a bit better than yours), i7 4790k and 16Gb of RAM (and a SSD but for the system not the game, though I could put the game on it. I guess that wouldn't be a bad move.).
it's not perfect on ultra, I think I've seen a few slowdowns, but nothing that I cannot live with. It might not even be related to the graphic settings.

[haagch]

Can confirm about the CPU. On my i7 3632QM + HD 7970M this is the benchmark on lowest settings:

https://www.youtube.com/watch?v=uk2goGOo9oQ

During gameplay it's sometimes even worse:

https://www.youtube.com/watch?v=Gl_CG_-Q8fY

The fighting is actually quite dull. With just alternating between left and right mouse click 2-3 times a second, you're pretty much invincible and have to ask the question: Why would anyone fear the orcs if one skilled fighter can take on an army for minutes without being hit once?