The Vulkan Differences Between AMDGPU-PRO, RADV & SteamVR's RADV Drivers

[phoronix]

Phoronix: The Vulkan Differences Between AMDGPU-PRO, RADV & SteamVR's RADV Drivers

With Valve having published a binary-only RADV Radeon Vulkan driver build for their beta of SteamVR on Linux, I did some poking out of curiosity to see the differences to the mainline RADV driver in Mesa. Out of curiosity I also did a comparison to see how the Vulkan capabilities compare to the proprietary AMDGPU-PRO Vulkan driver...

http://www.phoronix.com/scan.php?page=news_item&px=Radeon-Vulkan-Comparison

[Michael]

For those wondering about the exact vulkaninfo diffs between RADV and SteamVR RADV:

--- radv-vulkaninfo 2017-02-22 10:21:18.114418996 -0500
+++ radv-steamvr 2017-02-22 10:25:51.881880121 -0500
@@ -133,13 +191,17 @@
residencyAlignedMipSize = 0
residencyNonResidentStrict = 0

-Device Extensions count = 6
+Device Extensions count = 10
VK_KHR_maintenance1 : extension revision 1
VK_KHR_sampler_mirror_clamp_to_edge : extension revision 1
VK_KHR_swapchain : extension revision 68
VK_AMD_draw_indirect_count : extension revision 1
VK_KHR_get_physical_device_properties2: extension revision 1
VK_KHR_shader_draw_parameters : extension revision 1
+ VK_NV_dedicated_allocation : extension revision 1
+ VK_KHX_external_memory_capabilities : extension revision 1
+ VK_KHX_external_memory : extension revision 1
+ VK_KHX_external_memory_fd : extension revision 1

VkQueueFamilyProperties[0]:
===========================
@@ -182,7 +244,7 @@

memoryHeapCount = 3
memoryHeaps[0] :
- size = 3984752640 (0xed828000)
+ size = 3942973440 (0xeb050000)
flags:
VK_MEMORY_HEAP_DEVICE_LOCAL_BIT
memoryHeaps[1] :

[humbug]

cool

Khronos did say that virtual reality would be a focus of Vulkan 1.1

http://www.pcworld.com/article/3101843/software-games/vulkan-next-will-bring-better-support-for-vr-and-multiple-gpus.html

Expect khronos to official unveil the new spec at GDC next month. And then the rad-v devs will be allowed to open source this.

[shmerl]

How is radv licensed?

UPDATE: Looks like it's MIT, so Valve can do that without publishing the source of derived version.

[Laser]

How is radv licensed?

UPDATE: Looks like it's MIT, so Valve can do that without publishing the source of derived version.

Why on earth would Valve not release the source later? They have zero commercial interest in keeping this closed. It will most likely be opened after a code cleanup and the official introduction of those functions.

[tegs]

Why on earth would Valve not release the source later? They have zero commercial interest in keeping this closed. It will most likely be opened after a code cleanup and the official introduction of those functions.

We are still waiting on the Steam Controller API to be open sourced.

[shmerl]

Why on earth would Valve not release the source later? They have zero commercial interest in keeping this closed. It will most likely be opened after a code cleanup and the official introduction of those functions.

I don't see any good reasons, just commenting on how they released now without a source.

[airlied]

Valve didn't write any of the patches (they tested and provided fixes), I think I wrote all the necessary ones, so I'll just upstream them when Khronos gets moving.

[bibaheu]

Valve didn't write any of the patches (they tested and provided fixes), I think I wrote all the necessary ones, so I'll just upstream them when Khronos gets moving.

What's your opinion on the new extensions? If you can tell anything of course

[theriddick]

Is the open-source driver going to get freesync sometime I wonder?