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Vulkan: Enable as Experimental Option #113057

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Jeroen Bakker merged 7 commits from Jeroen-Bakker/blender:vulkan/enable-as-experimental into main 2023-10-06 15:24:31 +02:00
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Jeroen Bakker commented 2023-09-29 13:41:37 +02:00
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This PR enables vulkan backend as experimental option.
It will only be available in alpha builds on Linux and Windows.

This option is highly experimental and enabled to get some insight
on supported platforms. Don't expect a fully working Blender
yet. Also don't expect it to have usable performance.

What is known to not work?

  • OCIO textures are not supported on Intel and AMD GPUs. sRGB/Standard is supported
    on those platforms.
  • AMD Polaris based GPUs on Linux will generate a crash when drawing the 3d cursor as it
    doesn't support the needed vertex format. Comment out DRW_draw_cursor in DRW_draw_region_info.
  • The colors in the node editor and sequencer are of as sRGB viewports aren't detected correctly.
  • The image / UV editor isn't working as many texture formats haven't been tested yet. Some
    tweaks are also needed to do correct depth testing.
  • 3D Viewport is known to be flickering. Sometimes workbench doesn't display anything.
  • 3D Viewport wireframe will crash as it uses a framebuffer with gaps between color attachments,
    which isn't supported yet. (#113141)
  • Rotate the view widget is partially drawn due to incompatible depth clipping.
  • GPU Selection isn't working. It is expected to be solved when Overlay-Next will become the
    default engine. For now disable GPU depth picking in the preferences.
  • Cycles/EEVEE are known to not work with Vulkan yet. Cycles requires Vulkan Pixel Buffer.
    Cuda <-> Vulkan interop might require a different approach than OpenGL as Vulkan doesn't allow
    importing memory from a Cuda context. EEVEE uses features that aren't available yet in the backend
  • Workbench is working, except Workbench shadows.
  • EEVEE-Next basics are working. Shadows, lights are known to be not working. Materials/Shading
    works on a single object. Changes are expected in EEVEE-Next that will break Vulkan compatibility
    in the near future.
  • Systems with multiple GPUs is not working.
  • Wayland support is in review and should land before this PR (#113007)
  • OpenXR hasn't been modified and is expected to fail.
  • The backend is very strict when mis-using the GPU module. In debug builds it may crash
    on asserts.
  • Older drivers/GPUs might not have all the features that we require. The workarounds
    for the missing features still need to be implemented.

A word about performance

In the project planning we focus first on stability and platform support. The performance of Vulkan is
around 20% of what we want to achieve. The reason is that each command sent to the
GPU is done one at a time. The implementation even waits until we have feedback that the GPU
is idle again.

Geometry is currently stored in System RAM. The GPU will read and cache the data when
accessing geometry. This slows down when using objects with much geometry.
Some performance features like MDI (Multi-Draw-Indirect) hasn't been implemented and
falls back to Single Draw Indirect.

Why enable it is an experimental option?

  • Ensures that new features are being tested with Vulkan
  • Ensure that building with Vulkan is possible on supported platforms
  • Give feedback from developers if Vulkan can run on their system or that
    there are special cases that we are not aware of. Main development
    environment has been Linux/X11 with occasionally testing using Windows.
  • Validate Add-ons that use the gpu module.
  • Possible to enable GLSL validation on the buildbot. (Needs more work).
  • Does it compile on all machines or does it require more changes to cmake
    config. We expect it to be able to compile without installing the Vulkan SDK.
    The Vulkan SDK is a very powerful tool, but only when actually doing GPU
    development. Otherwise it is an overhead which slows down other
    activities.

How can the backend be enabled?

Currently the Vulkan backend can be enabled per Blender session by starting
with the command line argument --gpu-backend vulkan. In the future, after
the backend is proven to work, we will add a user preference to switch between
OpenGL and Vulkan.

This PR enables vulkan backend as experimental option. It will only be available in alpha builds on Linux and Windows. This option is highly experimental and enabled to get some insight on supported platforms. Don't expect a fully working Blender yet. Also don't expect it to have usable performance. **What is known to not work?** * OCIO textures are not supported on Intel and AMD GPUs. sRGB/Standard is supported on those platforms. * AMD Polaris based GPUs on Linux will generate a crash when drawing the 3d cursor as it doesn't support the needed vertex format. Comment out `DRW_draw_cursor` in `DRW_draw_region_info`. * The colors in the node editor and sequencer are of as sRGB viewports aren't detected correctly. * The image / UV editor isn't working as many texture formats haven't been tested yet. Some tweaks are also needed to do correct depth testing. * 3D Viewport is known to be flickering. Sometimes workbench doesn't display anything. * 3D Viewport wireframe will crash as it uses a framebuffer with gaps between color attachments, which isn't supported yet. (#113141) * Rotate the view widget is partially drawn due to incompatible depth clipping. * GPU Selection isn't working. It is expected to be solved when Overlay-Next will become the default engine. For now disable GPU depth picking in the preferences. * Cycles/EEVEE are known to not work with Vulkan yet. Cycles requires Vulkan Pixel Buffer. Cuda <-> Vulkan interop might require a different approach than OpenGL as Vulkan doesn't allow importing memory from a Cuda context. EEVEE uses features that aren't available yet in the backend * Workbench is working, except Workbench shadows. * EEVEE-Next basics are working. Shadows, lights are known to be not working. Materials/Shading works on a single object. Changes are expected in EEVEE-Next that will break Vulkan compatibility in the near future. * Systems with multiple GPUs is not working. * Wayland support is in review and should land before this PR (#113007) * OpenXR hasn't been modified and is expected to fail. * The backend is very strict when mis-using the GPU module. In debug builds it may crash on asserts. * Older drivers/GPUs might not have all the features that we require. The workarounds for the missing features still need to be implemented. **A word about performance** In the project planning we focus first on stability and platform support. The performance of Vulkan is around 20% of what we want to achieve. The reason is that each command sent to the GPU is done one at a time. The implementation even waits until we have feedback that the GPU is idle again. Geometry is currently stored in System RAM. The GPU will read and cache the data when accessing geometry. This slows down when using objects with much geometry. Some performance features like MDI (Multi-Draw-Indirect) hasn't been implemented and falls back to Single Draw Indirect. **Why enable it is an experimental option?** * Ensures that new features are being tested with Vulkan * Ensure that building with Vulkan is possible on supported platforms * Give feedback from developers if Vulkan can run on their system or that there are special cases that we are not aware of. Main development environment has been Linux/X11 with occasionally testing using Windows. * Validate Add-ons that use the `gpu` module. * Possible to enable GLSL validation on the buildbot. (Needs more work). * Does it compile on all machines or does it require more changes to cmake config. We expect it to be able to compile without installing the Vulkan SDK. The Vulkan SDK is a very powerful tool, but only when actually doing GPU development. Otherwise it is an overhead which slows down other activities. **How can the backend be enabled?** Currently the Vulkan backend can be enabled per Blender session by starting with the command line argument `--gpu-backend vulkan`. In the future, after the backend is proven to work, we will add a user preference to switch between OpenGL and Vulkan.
🎉 5
Jeroen Bakker added this to the 4.1 milestone 2023-09-29 13:41:37 +02:00
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Jeroen Bakker self-assigned this 2023-09-29 13:41:38 +02:00
Jeroen Bakker added 1 commit 2023-09-29 13:41:50 +02:00
buildbot/vexp-code-patch-coordinator Build done. Details
4e700eb2ea Vulkan: Enable as Experimental Option
Jeroen Bakker added a new dependency 2023-09-29 14:03:31 +02:00
#113007 Vulkan: Wayland Windowing
Jeroen Bakker commented 2023-09-29 14:34:53 +02:00
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Blender Bot commented 2023-09-29 14:34:58 +02:00
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Package build started. Download here when ready.

Package build started. [Download here](https://builder.blender.org/download/patch/PR113057) when ready.
Jeroen Bakker requested review from Brecht Van Lommel 2023-09-29 14:35:32 +02:00
Jeroen Bakker requested review from Clément Foucault 2023-09-29 14:35:42 +02:00
Jeroen Bakker requested review from Ray molenkamp 2023-09-29 14:36:02 +02:00
Jeroen Bakker requested review from Campbell Barton 2023-09-29 14:36:44 +02:00
Jeroen Bakker requested review from Bastien Montagne 2023-09-29 14:36:54 +02:00
Jeroen Bakker commented 2023-09-29 14:37:38 +02:00
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I added the platform maintainers as reviewer, and Bastien as being the admin associated with the Vulkan Backend.

I added the platform maintainers as reviewer, and Bastien as being the admin associated with the Vulkan Backend.
Jeroen Bakker commented 2023-09-29 15:24:31 +02:00
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Seems like the linux build is failing as it is looking for the OS vulkan library (libvulkan.so) on the buildbot worker, who might be head-less. Solution might be to use https://github.com/KhronosGroup/Vulkan-Loader or https://github.com/zeux/volk/

Volk seems like the most easy to integrate with least amount of overhead. Will integrate volk.

Seems like the linux build is failing as it is looking for the OS vulkan library (libvulkan.so) on the buildbot worker, who might be head-less. Solution might be to use https://github.com/KhronosGroup/Vulkan-Loader or https://github.com/zeux/volk/ Volk seems like the most easy to integrate with least amount of overhead. Will integrate volk.
Jeroen Bakker changed title from Vulkan: Enable as Experimental Option to WIP: Vulkan: Enable as Experimental Option 2023-09-29 15:45:26 +02:00
Brecht Van Lommel commented 2023-09-29 17:29:26 +02:00
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So this would be the equivalent of glew/epoxy? Would it be in extern/ or a new library dependency?

So this would be the equivalent of glew/epoxy? Would it be in extern/ or a new library dependency?
Brecht Van Lommel reviewed 2023-09-29 17:30:01 +02:00
build_files/cmake/platform/platform_apple.cmake Outdated
@ -107,3 +105,1 @@
find_package(ShaderC REQUIRED)
find_package(Vulkan REQUIRED)
endif()
set(WITH_VULKAN_BACKEND OFF)
Brecht Van Lommel commented 2023-09-29 17:30:01 +02:00
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Generally prefer to make the option unavailable rather than silently disabling it like this.

Generally prefer to make the option unavailable rather than silently disabling it like this.
Jeroen-Bakker marked this conversation as resolved
Brecht Van Lommel commented 2023-09-29 19:45:44 +02:00
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As noted by @LazyDodo on chat, Vulkan Loader is already part of the precompiled libraries, and perhaps the only thing missing is installing the relevant shared libraries?

For Linux this would be done with add_bundled_libraries(vulkan/lib).

As noted by @LazyDodo on chat, Vulkan Loader is already part of the precompiled libraries, and perhaps the only thing missing is installing the relevant shared libraries? For Linux this would be done with `add_bundled_libraries(vulkan/lib)`.
Ray molenkamp commented 2023-09-29 19:57:29 +02:00
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Seems like the linux build is failing as it is looking for the OS vulkan library (libvulkan.so) on the buildbot worker

That's not the OS vulkan library, that's the vulkan loader from our library folder, which we linked, but seemingly didn't copy to our bin folder just yet.

diff --git a/source/creator/CMakeLists.txt b/source/creator/CMakeLists.txt
index 8c8c88326b7..efceb17b452 100644
--- a/source/creator/CMakeLists.txt
+++ b/source/creator/CMakeLists.txt
@@ -897,6 +897,13 @@ elseif(WIN32)
     ALL
   )

+  if(WITH_VULKAN_BACKEND)
+    windows_install_shared_manifest(
+      FILES ${LIBDIR}/vulkan/bin/vulkan-1.dll
+      ALL
+    )
+  endif()
+
   if(WITH_OPENMP AND MSVC_CLANG)
     windows_install_shared_manifest(
       FILES ${CLANG_OPENMP_DLL}

will fix the issue for the windows bots, linux will need something similar brecht already posted the linux fix

> Seems like the linux build is failing as it is looking for the OS vulkan library (libvulkan.so) on the buildbot worker That's not the OS vulkan library, that's the vulkan loader from our library folder, which we linked, but seemingly didn't copy to our bin folder just yet. ``` diff --git a/source/creator/CMakeLists.txt b/source/creator/CMakeLists.txt index 8c8c88326b7..efceb17b452 100644 --- a/source/creator/CMakeLists.txt +++ b/source/creator/CMakeLists.txt @@ -897,6 +897,13 @@ elseif(WIN32) ALL ) + if(WITH_VULKAN_BACKEND) + windows_install_shared_manifest( + FILES ${LIBDIR}/vulkan/bin/vulkan-1.dll + ALL + ) + endif() + if(WITH_OPENMP AND MSVC_CLANG) windows_install_shared_manifest( FILES ${CLANG_OPENMP_DLL} ``` will fix the issue for the windows bots, ~~linux will need something similar~~ brecht already posted the linux fix
Jeroen Bakker added 3 commits 2023-10-02 08:09:00 +02:00
buildbot/vexp-code-patch-coordinator Build done. Details
35685bce7c Add vulkan lib as installable file
Jeroen Bakker commented 2023-10-02 08:09:55 +02:00
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@blender-bot package

@blender-bot package
Blender Bot commented 2023-10-02 08:09:59 +02:00
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Package build started. Download here when ready.

Package build started. [Download here](https://builder.blender.org/download/patch/PR113057) when ready.
Jeroen Bakker changed title from WIP: Vulkan: Enable as Experimental Option to Vulkan: Enable as Experimental Option 2023-10-02 09:31:28 +02:00
Jeroen Bakker commented 2023-10-02 09:32:06 +02:00
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@brecht @LazyDodo yes that seems to work! Thanks.

@brecht @LazyDodo yes that seems to work! Thanks.
Jeroen Bakker added this to the EEVEE & Viewport project 2023-10-02 09:47:44 +02:00
Brecht Van Lommel approved these changes 2023-10-02 11:13:27 +02:00
Jeroen Bakker commented 2023-10-02 11:29:23 +02:00
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I downloaded the windows build on a laptop, but it couldn't find a suitable vulkan device. Will look in more depth why it couldn't detect the device.

I downloaded the windows build on a laptop, but it couldn't find a suitable vulkan device. Will look in more depth why it couldn't detect the device.
Ray molenkamp commented 2023-10-02 15:27:52 +02:00
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I downloaded the windows build on a laptop, but it couldn't find a suitable vulkan device. Will look in more depth why it couldn't detect the device.

"Works for me", downloaded the build off the bots and blender started just fine (validated it was using vulkan by switching to wireframe mode to make it crash), whatever it is must be local to your laptop. Then again odds are whatever is happening may be happening on other systems as well, any diagnostics you could add there would help future triagers.

> I downloaded the windows build on a laptop, but it couldn't find a suitable vulkan device. Will look in more depth why it couldn't detect the device. "Works for me", downloaded the build off the bots and blender started just fine (validated it was using vulkan by switching to wireframe mode to make it crash), whatever it is must be local to your laptop. Then again odds are whatever is happening may be happening on other systems as well, any diagnostics you could add there would help future triagers.
👍 1
Ray molenkamp requested changes 2023-10-02 15:30:57 +02:00
CMakeLists.txt Outdated
@ -805,0 +803,4 @@
WITH_VULKAN_BACKEND
WITH_VULKAN_GUARDEDALLOC
)
else()
Ray molenkamp commented 2023-10-02 15:29:11 +02:00
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not needed, we don't do this for other variables like the wayland stuff either, any non existent variable is equal to false in cmake.

not needed, we don't do this for other variables like the wayland stuff either, any non existent variable is equal to false in cmake.
Jeroen-Bakker marked this conversation as resolved
build_files/cmake/platform/platform_unix.cmake Outdated
@ -46,6 +46,9 @@ else()
endif()
endif()
if (NOT WITH_EXPERIMENTAL_FEATURES)
Ray molenkamp commented 2023-10-02 15:30:18 +02:00
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Code is duplicated between the linux and windows platform file, there must be a better place for this

Code is duplicated between the linux and windows platform file, there must be a better place for this
Jeroen-Bakker marked this conversation as resolved
Jeroen Bakker added 1 commit 2023-10-03 07:42:11 +02:00
Jeroen Bakker commented 2023-10-03 08:00:52 +02:00
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I found out that the platform I used doesn't support VK_KHR_maintenance4 which was added for performance reasons.
Seems like we need to only enable this when it is available. Can be fixed by updating drivers. Currently around 20% of all platforms
support this extension. Which is fine as it also counts platforms that existed before this extension was introduced :-)

https://vulkan.gpuinfo.org/listdevicescoverage.php?extensionname=VK_KHR_maintenance4&extensionfeature=maintenance4&platform=all

I found out that the platform I used doesn't support `VK_KHR_maintenance4` which was added for performance reasons. Seems like we need to only enable this when it is available. Can be fixed by updating drivers. Currently around 20% of all platforms support this extension. Which is fine as it also counts platforms that existed before this extension was introduced :-) https://vulkan.gpuinfo.org/listdevicescoverage.php?extensionname=VK_KHR_maintenance4&extensionfeature=maintenance4&platform=all
Ray molenkamp commented 2023-10-03 23:15:44 +02:00
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I found out that the platform I used doesn't support VK_KHR_maintenance4 which was added for performance reasons.
Seems like we need to only enable this when it is available. Can be fixed by updating drivers. Currently around 20% of all platforms
support this extension. Which is fine as it also counts platforms that existed before this extension was introduced :-)

https://vulkan.gpuinfo.org/listdevicescoverage.php?extensionname=VK_KHR_maintenance4&extensionfeature=maintenance4&platform=all

I'm a bit confused on the actual solution you are suggesting here, is it

a) update your drivers, we need VK_KHR_maintenance4 otherwise blender won't run, in which case we need to communicate this with the users, ie a popup going "no, sorry" beats a crash.

b) We shouldn't rely on it, unless it's available, we'll fix the code so it's used when available, and if not, no big deal blender will still run (although it's best to update your drivers for optimal performance) ?

> I found out that the platform I used doesn't support `VK_KHR_maintenance4` which was added for performance reasons. > Seems like we need to only enable this when it is available. Can be fixed by updating drivers. Currently around 20% of all platforms > support this extension. Which is fine as it also counts platforms that existed before this extension was introduced :-) > > https://vulkan.gpuinfo.org/listdevicescoverage.php?extensionname=VK_KHR_maintenance4&extensionfeature=maintenance4&platform=all I'm a bit confused on the actual solution you are suggesting here, is it a) update your drivers, we need `VK_KHR_maintenance4` otherwise blender won't run, in which case we need to communicate this with the users, ie a popup going "no, sorry" beats a crash. b) We shouldn't rely on it, unless it's available, we'll fix the code so it's used when available, and if not, no big deal blender will still run (although it's _best_ to update your drivers for optimal performance) ?
Jeroen Bakker commented 2023-10-04 08:43:05 +02:00
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b) We shouldn't rely on it, unless it's available, we'll fix the code so it's used when available, and if not, no big deal blender will still run (although it's best to update your drivers for optimal performance) ?

This one. Still need to test on a not supporting device (#113239)

> b) We shouldn't rely on it, unless it's available, we'll fix the code so it's used when available, and if not, no big deal blender will still run (although it's _best_ to update your drivers for optimal performance) ? This one. Still need to test on a not supporting device (#113239)
Jeroen Bakker added 1 commit 2023-10-05 13:41:29 +02:00
buildbot/vexp-code-patch-coordinator Build done. Details
2cb3dd62d1 Merge branch 'main' into vulkan/enable-as-experimental
Jeroen Bakker commented 2023-10-05 13:41:48 +02:00
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Blender Bot commented 2023-10-05 13:41:52 +02:00
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Package build started. Download here when ready.

Package build started. [Download here](https://builder.blender.org/download/patch/PR113057) when ready.
Jeroen Bakker commented 2023-10-05 15:33:55 +02:00
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Running on Intel Iris Plus (Vulkan 1.2)

image

Running on Intel Iris Plus (Vulkan 1.2) ![image](/attachments/35bd8483-8500-4566-9de1-5d25b8c7aa09)
image.png
3.1 MiB
❤️ 1 🎉 1 🚀 1
Ray molenkamp approved these changes 2023-10-05 17:04:49 +02:00
Clément Foucault approved these changes 2023-10-06 14:50:09 +02:00
Jeroen Bakker added 1 commit 2023-10-06 14:51:34 +02:00
buildbot/vexp-code-patch-coordinator Build done. Details
265e19ec4a Merge branch 'main' into vulkan/enable-as-experimental
Jeroen Bakker commented 2023-10-06 14:51:53 +02:00
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Blender Bot commented 2023-10-06 14:51:56 +02:00
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Package build started. Download here when ready.

Package build started. [Download here](https://builder.blender.org/download/patch/PR113057) when ready.
Jeroen Bakker merged commit 1aca58cf16 into main 2023-10-06 15:24:31 +02:00
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Jeroen Bakker
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Depends on
#113007 Vulkan: Wayland Windowing
blender/blender
Reference: blender/blender#113057
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Delete Branch "Jeroen-Bakker/blender:vulkan/enable-as-experimental"

Deleting a branch is permanent. Although the deleted branch may continue to exist for a short time before it actually gets removed, it CANNOT be undone in most cases. Continue?