Profile checker Android app by cgopinathc · Pull Request #1036 · KhronosGroup/Vulkan-Profiles

cgopinathc · 2026-10-14T09:59:13Z

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ci-tester-lunarg · 2026-10-14T09:59:17Z

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CLAassistant · 2026-10-14T10:00:06Z

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cgopinathc · 2026-10-14T11:39:03Z

android/profiles-checker
- Pure C++ NativeActivity (no Java/Kotlin), builds with Gradle/CMake
  from inside the repo checkout.
- CMake fetches Vulkan-Headers, creates a private Python venv and runs
  scripts/vkprofiles.py to generate a debug header-only profiles
  library for the selected profiles (default: VP_ANDROID_15/16/17,
  VP_ANDROID_vulkan_profile_2021/2022/2025, VP_KHR_roadmap_2022/2024/
  2026; overridable via -DVP_CHECKER_PROFILES).
- Captures VP_DEBUG_MESSAGE_CALLBACK output and groups unmet
  conditions per profile into API version / extensions / features /
  properties & limits / formats. Tap-to-expand software-rendered UI;
  same report written to logcat and files/report.txt.
- Also reports GPU, vendor/device ID, API version, decoded driver
  version, VkPhysicalDeviceDriverProperties and Android SoC/driver
  package properties. Vulkan is dlopen'ed so 1.0-only devices still
  produce a report.
- README with build/usage instructions; linked from the top-level
  README.

ci-tester-lunarg · 2026-10-14T12:08:30Z

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cgopinathc · 2026-10-14T12:34:17Z

christophe-lunarg

I created this PR: #1037

to capture the data changes, the limitype tweaks and doubled checked what was submitted.

Still work in progress...

I'll continue on this tomorrow.

christophe-lunarg · 2026-10-14T15:02:29Z


        # Unsupported
-        PropertyRequirement('VkPhysicalDeviceMaintenance7PropertiesKHR', 'robustFragmentShadingRateAttachmentAccess', 'false', 'VkPhysicalDeviceMaintenance7FeaturesKHR::maintenance7'),
+        PropertyRequirement('VkPhysicalDeviceMaintenance7PropertiesKHR', 'robustFragmentShadingRateAttachmentAccess', None, 'VkPhysicalDeviceMaintenance7FeaturesKHR::maintenance7'),


I believe the value was reverted here. The limitype is "max".

christophe-lunarg · 2026-10-14T15:04:17Z

        PropertyRequirement('VkPhysicalDeviceRayTracingPipelinePropertiesKHR', 'maxShaderGroupStride', '4096', None),
-        PropertyRequirement('VkPhysicalDeviceRayTracingPipelinePropertiesKHR', 'shaderGroupBaseAlignment', '64', None),
-        PropertyRequirement('VkPhysicalDeviceRayTracingPipelinePropertiesKHR', 'shaderGroupHandleCaptureReplaySize', '64', None),
+        PropertyRequirement('VkPhysicalDeviceRayTracingPipelinePropertiesKHR', 'shaderGroupBaseAlignment', None, None),


Here it's a limitype problem in vk.xml. The spec says 'max' and provide the value 64.

christophe-lunarg · 2026-10-14T15:05:47Z

-        PropertyRequirement('VkPhysicalDeviceRayTracingPipelinePropertiesKHR', 'shaderGroupBaseAlignment', '64', None),
-        PropertyRequirement('VkPhysicalDeviceRayTracingPipelinePropertiesKHR', 'shaderGroupHandleCaptureReplaySize', '64', None),
+        PropertyRequirement('VkPhysicalDeviceRayTracingPipelinePropertiesKHR', 'shaderGroupBaseAlignment', None, None),
+        PropertyRequirement('VkPhysicalDeviceRayTracingPipelinePropertiesKHR', 'shaderGroupHandleCaptureReplaySize', None, None),


Same as: shaderGroupBaseAlignment

christophe-lunarg · 2026-10-14T15:28:41Z

+        PropertyRequirement('VkPhysicalDeviceFragmentShadingRatePropertiesKHR', 'maxFragmentSize', '2, 2', None),
        PropertyRequirement('VkPhysicalDeviceFragmentShadingRatePropertiesKHR', 'maxFragmentSizeAspectRatio', '2', None),
        PropertyRequirement('VkPhysicalDeviceFragmentShadingRatePropertiesKHR', 'maxFragmentShadingRateCoverageSamples', '16', None),
        PropertyRequirement('VkPhysicalDeviceFragmentShadingRatePropertiesKHR', 'maxFragmentShadingRateRasterizationSamples', 'VK_SAMPLE_COUNT_1_BIT', None),


maxFragmentShadingRateRasterizationSamples is VK_SAMPLE_COUNT_4_BIT in the spec

christophe-lunarg · 2026-10-14T15:30:23Z

-        PropertyRequirement('VkPhysicalDeviceDescriptorBufferPropertiesEXT', 'imageViewCaptureReplayDescriptorDataSize', '64', 'VkPhysicalDeviceDescriptorBufferFeaturesEXT::descriptorBuffer'),
-        PropertyRequirement('VkPhysicalDeviceDescriptorBufferPropertiesEXT', 'samplerCaptureReplayDescriptorDataSize', '64', 'VkPhysicalDeviceDescriptorBufferFeaturesEXT::descriptorBuffer'),
-        PropertyRequirement('VkPhysicalDeviceDescriptorBufferPropertiesEXT', 'accelerationStructureCaptureReplayDescriptorDataSize', '64', 'VkPhysicalDeviceDescriptorBufferFeaturesEXT::descriptorBuffer'),
+        PropertyRequirement('VkPhysicalDeviceDescriptorBufferPropertiesEXT', 'descriptorBufferOffsetAlignment', None, 'VkPhysicalDeviceDescriptorBufferFeaturesEXT::descriptorBuffer'),


in the spec descriptorBufferOffsetAlignment is set to "max" but I believe it translates into 'min,pot' in vk.xml

christophe-lunarg · 2026-10-14T15:33:18Z

-        PropertyRequirement('VkPhysicalDeviceDescriptorBufferPropertiesEXT', 'samplerCaptureReplayDescriptorDataSize', '64', 'VkPhysicalDeviceDescriptorBufferFeaturesEXT::descriptorBuffer'),
-        PropertyRequirement('VkPhysicalDeviceDescriptorBufferPropertiesEXT', 'accelerationStructureCaptureReplayDescriptorDataSize', '64', 'VkPhysicalDeviceDescriptorBufferFeaturesEXT::descriptorBuffer'),
+        PropertyRequirement('VkPhysicalDeviceDescriptorBufferPropertiesEXT', 'descriptorBufferOffsetAlignment', None, 'VkPhysicalDeviceDescriptorBufferFeaturesEXT::descriptorBuffer'),
+        PropertyRequirement('VkPhysicalDeviceDescriptorBufferPropertiesEXT', 'bufferCaptureReplayDescriptorDataSize', None, 'VkPhysicalDeviceDescriptorBufferFeaturesEXT::descriptorBuffer'),


The spec set it to max 64 and I believe the issue is that vk.xml set is to noauto but in vk.xml is should be "min".

Same for all the "DataSize" member os this structure.

christophe-lunarg · 2026-10-14T15:40:19Z

-        PropertyRequirement('VkPhysicalDeviceBlendOperationAdvancedPropertiesEXT', 'advancedBlendNonPremultipliedDstColor', 'true', None),
-        PropertyRequirement('VkPhysicalDeviceBlendOperationAdvancedPropertiesEXT', 'advancedBlendCorrelatedOverlap', 'true', None),
-        PropertyRequirement('VkPhysicalDeviceBlendOperationAdvancedPropertiesEXT', 'advancedBlendAllOperations', 'true', None),
+        PropertyRequirement('VkPhysicalDeviceBlendOperationAdvancedPropertiesEXT', 'advancedBlendIndependentBlend', None, None),


The issue here is that the default properties for VkPhysicalDeviceBlendOperationAdvancedPropertiesEXT should be false.

The spec says "platform-dependent" but vk.xml says "max" which I believe is correct, it's capabilities that are supported or not.

christophe-lunarg · 2026-10-14T15:50:23Z

                            "lineSubPixelPrecisionBits": 4,
-                            "maxVertexAttribDivisor": 2147483647,
+                            "maxVertexAttribDivisor": 65535,
                            "supportsNonZeroFirstInstance": true,


supportsNonZeroFirstInstance should be false.

christophe-lunarg · 2026-10-15T11:33:41Z

I would encourage you to rebase with main branch to grab the changes from #1037.

Feel free to comment about values that you think are incorrect.

I believe there are still some work to do on the data but this is a great step up. I'll continue working on this.

cgopinathc · 2026-10-16T07:13:00Z

Sure, I will rebase and try to check if the app works well without any of my changes to scripts.
Thanks Christophe

ci-tester-lunarg · 2026-10-17T05:12:17Z

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ci-tester-lunarg · 2026-10-17T05:12:17Z

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ci-tester-lunarg · 2026-10-17T05:26:47Z

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ci-tester-lunarg · 2026-10-17T05:26:47Z

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ci-tester-lunarg · 2026-10-17T05:37:58Z

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christophe-lunarg · 2026-10-19T16:32:33Z

I ran the internal C.I. test just to be sure I am not missing something, it passes so merging.

cgopinathc force-pushed the android_app branch from 8db411b to 9d6c676 Compare October 14, 2026 12:08

christophe-lunarg reviewed Oct 14, 2026

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christophe-lunarg linked an issue Oct 15, 2026 that may be closed by this pull request

Profile-checker Android app #1035

Closed

cgopinathc force-pushed the android_app branch from 9d6c676 to 8c0ac5b Compare October 17, 2026 05:12

cgopinathc force-pushed the android_app branch from 8c0ac5b to 8f9d2fd Compare October 17, 2026 05:26

Profile checker Android app

187775b

cgopinathc force-pushed the android_app branch from 8f9d2fd to 187775b Compare October 17, 2026 05:37

cgopinathc marked this pull request as ready for review October 17, 2026 05:41

christophe-lunarg approved these changes Oct 19, 2026

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christophe-lunarg merged commit 82a5c1b into KhronosGroup:main Oct 19, 2026
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