Valve Developer Lands VK_EXT_global_priority For RADV Vulkan Driver

[phoronix]

Phoronix: Valve Developer Lands VK_EXT_global_priority For RADV Vulkan Driver

Squeezing into Mesa Git ahead of the Mesa 17.3 branching is support for the EXT_global_priority extension within the RADV Vulkan driver...

http://www.phoronix.com/scan.php?page=news_item&px=RADV-Lands-Global-Priority

[humbug]

Great work guys.

I've got an HTC Vive and an R9 290 GPU. It won't be long before it's as good on Linux Vulkan as it is on windows...

[haagch]

It also needs libdrm git and kernel patches that are already for example in amd-staging-drm-next or drm-next-4.15-wip: https://cgit.freedesktop.org/~agd5f/...dres+Rodriguez

The current kernel code only allows you to run something with high priority when you have CAP_SYS_NICE or if you have the DRM Master. With a drm lease you will have the latter and I guess running as root should take quick care of the former.
The SteamVR compositor on radv will still need some time to do either, so maybe this is a good idea for the time being: https://gist.github.com/ChristophHaa...b25f7515fb8453

There's an undocumented steamvr config option to enable the SteamVR compositor implementation of it but as of now it doesn't work because it still looks for VK_EXT_queue_global_priority, the original proposed name of the extension, which is now called VK_EXT_global_priority.

So proper experimental support will probably come with the next SteamVR beta update.