RADV Vulkan Driver's ACO Compiler Back-End Has Navi/GFX10 Nearly Squared Away

[phoronix]

Phoronix: RADV Vulkan Driver's ACO Compiler Back-End Has Navi/GFX10 Nearly Squared Away

Following a lot of work on the AMD "ACO" compiler back-end to the RADV Vulkan driver for GFX10/Navi, this experimental alternative to AMDGPU LLVM is about ready to go for these newest AMD graphics processors...

http://www.phoronix.com/scan.php?page=news_item&px=RADVO-ACO-Navi-Final-MR

[shmerl]

You should already use the primary git repo for Mesa, which has moved to Gitlab: https://gitlab.freedesktop.org/mesa/mesa

[shmerl]

Navi performance with aco so far is slightly worse than llvm. After hazards mitigations, developers will focus on optimizations.

1920x1200, Sapphire Pulse RX 5700 XT

llvm:



aco:

[Venemo]

Navi performance with aco so far is slightly worse than llvm. After hazards mitigations, developers will focus on optimizations.

Just because you get 1% lower FPS in TW3, doesn't mean it's slower in all games. There've been other reports from other games which show the opposite.

Also keep in mind that some games (eg. Rise of The Tomb Raider) are not yet playable on LLVM, but work with ACO.

I'm looking forward to Michael's benchmarks, after the currently open merge requests land.

[shmerl]

Just because you get 1% lower FPS in TW3, doesn't mean it's slower in all games. There've been other reports from other games which show the opposite.

Good point, but when I was testing it on Vega, aco was actually ahead, so I assume for Navi it's missing some optimizations that make that difference. TW3 is a decent benchmark, because it's for sure GPU bound unlike games that have CPU bottlenecks.