AMD Kaveri Gets A Big Performance Boost With Mesa 18.2 & AMDGPU DRM

[phoronix]

Phoronix: AMD Kaveri Gets A Big Performance Boost With Mesa 18.2 & AMDGPU DRM

When using the latest Git/development code of Mesa 18.2 on Kaveri APUs you may find up to a 2x increase in performance if you are using the AMDGPU DRM driver rather than the default Radeon DRM driver...

http://www.phoronix.com/scan.php?page=news_item&px=AMD-Kaveri-Mesa-18.2-Boost

[Veto]

Should this really be fixed in the kernel instead?

[tomtomme]

Wow, after so many years. What a bad joke

[R41N3R]

Funny story and nobody noticed? :-)

[haplo602]

I wonder if they have the same issue on Windows side as well :-))

[Adarion]

Or if such issues exist on other chips, too.
Well, good that this is fixed.

[droste]

Funny story and nobody noticed? :-)

The comment in the code before this commit was:

/* KV should be 0x00000002, but that causes problems with radeon */

So I'm pretty sure someone noticed before. The difference now is that "2" is working with the amdgpu kernel module.

[SvenK]

If they have the same Issue with other cards and on other OS. Vega could be so fast, that "poor Volta" could be real...

[haplo602]

The comment in the code before this commit was:


So I'm pretty sure someone noticed before. The difference now is that "2" is working with the amdgpu kernel module.

So instead of fixing radeon, they crippled the performance ... also a solution ...

[chithanh]

In related news, AMD now plans to disable amdgpu DC on Kaveri by default: https://lists.freedesktop.org/archiv...ay/022021.html
Because they have no hardware to test LVDS/VGA. Which apparently wasn't a problem before amdgpu DC or with radeon?