When developing using Vulkan, I can instruct it to let me know of any potential performance issues. This is the one thing that appears in my log: ``` Validation Performance Warning: [ UNASSIGNED-khronos-Validation-debug-build-warning-message ] Object 0: handle = 0x37fec0, type = VK_OBJECT_TYPE_INSTANCE; | MessageID = 0x26ac7233 | VALIDATION LAYERS WARNING: Using debug builds of the validation layers *will* adversely affect performance. ``` This indicates that `vulkan-layers` is either in debug mode, or it thinks that it is. I suspect then the same happens with `vulkan-tools` and `vulkan-loader` as well, even though there's no message. Reproducible: Always Steps to Reproduce: 1. Run a Vulkan application that utilizes the `VK_EXT_debug_utils` extension, and debugs instance creation. This can be achieved by following `vulkan-tutorial.com` up to the end of this stage: https://vulkan-tutorial.com/Drawing_a_triangle/Setup/Validation_layers (code at bottom) 2. Look at console Actual Results: Get a warning informing me `vulkan-layers` is in debug mode Expected Results: No such warning The severity of this bug greatly depends on whether it is actually debug, or it just thinks it is debug. According to the `vulkan-layers` `BUILD.md`, by default, it decides its build is debug.
The warning is thrown when the target application is compiled in debug, not layers. You can fix this by defining NDEBUG when compiling.
Well, no. When running the same application with validation layer binaries provided by LunarG, this warning does not appear. See here in their source, a file that is compiled when the `vulkan-layers` package is installed in Gentoo: https://github.com/KhronosGroup/Vulkan-ValidationLayers/blob/22e2b2784b04eed6f503e4f127e1d6a62d154397/scripts/layer_chassis_generator.py#L816 Furthermore, compiling the target application in release mode does not remove the warning.
Sorry, you're right. The ebuild was doing the wrong thing to set NDEBUG. While you can fix this by compiling the target application with NDEBUG, obviously the ebuild should set it too
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=d52e6e589ebd7b0f5abc4b700c95a99b67a32776 commit d52e6e589ebd7b0f5abc4b700c95a99b67a32776 Author: Nick Sarnie <sarnex@gentoo.org> AuthorDate: 2021-08-07 15:01:48 +0000 Commit: Nick Sarnie <sarnex@gentoo.org> CommitDate: 2021-08-07 15:03:58 +0000 media-libs/vulkan-layers: Make sure NDEBUG is set Closes: https://bugs.gentoo.org/796662 Package-Manager: Portage-3.0.20, Repoman-3.0.3 Signed-off-by: Nick Sarnie <sarnex@gentoo.org> .../vulkan-layers/vulkan-layers-1.2.182-r1.ebuild | 60 ++++++++++++++++++++++ .../vulkan-layers/vulkan-layers-1.2.182.ebuildu | 57 ++++++++++++++++++++ media-libs/vulkan-layers/vulkan-layers-9999.ebuild | 13 +++-- 3 files changed, 126 insertions(+), 4 deletions(-)
Might be worth investigating whether the same issue occurs with `vulkan-tools` and `vulkan-loader`, but they just lack an avenue to report it.
The bug has been referenced in the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=296a7e3ebc72720e8bf385b2a2508b099245df44 commit 296a7e3ebc72720e8bf385b2a2508b099245df44 Author: Nick Sarnie <sarnex@gentoo.org> AuthorDate: 2021-08-07 19:35:35 +0000 Commit: Nick Sarnie <sarnex@gentoo.org> CommitDate: 2021-08-07 19:36:26 +0000 dev-util/vulkan-tools: Make sure NDEBUG is set Bug: https://bugs.gentoo.org/796662 Package-Manager: Portage-3.0.20, Repoman-3.0.3 Signed-off-by: Nick Sarnie <sarnex@gentoo.org> .../vulkan-tools/vulkan-tools-1.2.182-r1.ebuild | 86 ++++++++++++++++++++++ dev-util/vulkan-tools/vulkan-tools-9999.ebuild | 15 ++-- 2 files changed, 96 insertions(+), 5 deletions(-) https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=f417aa0799113b639784eb3e7409e66da76e582f commit f417aa0799113b639784eb3e7409e66da76e582f Author: Nick Sarnie <sarnex@gentoo.org> AuthorDate: 2021-08-07 19:32:31 +0000 Commit: Nick Sarnie <sarnex@gentoo.org> CommitDate: 2021-08-07 19:36:22 +0000 media-libs/vulkan-loader: Make sure NDEBUG is set Bug: https://bugs.gentoo.org/796662 Package-Manager: Portage-3.0.20, Repoman-3.0.3 Signed-off-by: Nick Sarnie <sarnex@gentoo.org> .../vulkan-loader/vulkan-loader-1.2.182-r1.ebuild | 70 ++++++++++++++++++++++ media-libs/vulkan-loader/vulkan-loader-9999.ebuild | 15 +++-- 2 files changed, 80 insertions(+), 5 deletions(-)
The chosen fix to this was suboptimal.
