{"id":1434,"date":"2019-07-10T12:21:48","date_gmt":"2019-07-10T18:21:48","guid":{"rendered":"https:\/\/www.lunarg.com\/?p=1434"},"modified":"2025-01-15T18:11:08","modified_gmt":"2025-01-16T01:11:08","slug":"updated-vulkan-white-paper-available-for-gpu-assisted-validation","status":"publish","type":"post","link":"https:\/\/www.lunarg.com\/updated-vulkan-white-paper-available-for-gpu-assisted-validation\/","title":{"rendered":"White paper update available for new Vulkan GPU-assisted validation"},"content":{"rendered":"

LunarG updates the GPU-Assisted Validation white paper to reflect new validation available for situations when the VK_EXT_descriptor_indexing extension is enabled. LunarG originally released GPU-Assisted validation with the Vulkan 1.1.97.0 SDK.\u00a0 Read on for more information about this new validation and its description in the updated LunarG GPU-Assisted Validation white paper<\/a>.<\/strong><\/p>\n

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The Vulkan validation layers perform a variety of API usage checks during application execution. These checks verify that the application is using the API correctly by performing stateless parameter checking, object lifetime tracking, object state validation, and various other checks. The layers 1) perform these checks on the CPU as the Vulkan application executes and 2) provide valuable information about Vulkan API usage to the developer.<\/span><\/p>\n

However, much of an application\u2019s activity is on the GPU, where the CPU-based validation layers have little visibility. The new white paper explains the concept of GPU-assisted validation and how a developer can use it.\u00a0<\/span><\/p>\n

What is GPU-Assisted Validation?<\/strong><\/h2>\n

GPU-assisted validation (or GPU-AV) involves using the GPU to check for API usage errors at shader execution time. These on-GPU checks can\u2019t always find general shader program logic errors but can detect certain run-time problems like out-of-bounds (OOB) indexing into descriptor arrays and accessing invalid descriptors.<\/p>\n

This feature\u2019s design is intended to allow the developer to use nearly the same validation layer workflow on the GPU as on the CPU. This white paper discusses the types of GPU-assisted validation that have been implemented in a validation layer.\u00a0<\/span><\/p>\n

Phase 2 of GPU-Assisted Validation<\/strong><\/h2>\n

LunarG designed the second phase of GPU-assisted validation to address validation when various descriptor indexing features are enabled. <\/span>Descriptor indexing allows for various scenarios that can be difficult to validate on the CPU:<\/span><\/p>\n