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Vulkan-Docs/appendices/VK_KHR_vulkan_memory_model.txt

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Change log for September 8, 2018 Vulkan 1.1.84 spec update: * Update release number to 84. Public Issues: * Fix code sample in the `<<VK_EXT_debug_utils>>` extension (public issue 751). * Fix misleading comment in `vk.xml` for slink:VkDescriptorBufferInfo::pname:buffer (public pull request 762). * Fix formatting of deprecation attributes in schema doc (public pull request 767). * Change `can` to `may` in the description of elink:VkSparseImageFormatFlagBits, which are return values from queries (public pull request 768). * Prettify generated contact list in extension appendices, adding logos and a New Issue link (public pull request 770). * Enable sRGB conversion based on the image view format, not the image format, in the <<textures-format-conversion, Format Conversion>> section (public pull request 773). * Fix typo in equation in the <<primsrast-lines-basic, Basic Line Segment Rasterization>> section (public pull request 780). * Fix special characters in GitHub contacts links (public pull request 783). * Make clean_pdf target remove pdf folder (public pull request 784). * Fix styleguide bad markup of block continuation (public pull request 792). Other Issues: * Allow a zero vertex attribute divisor in the `<<VK_EXT_vertex_attribute_divisor>>` extension, exposed via the slink:VkPhysicalDeviceVertexAttributeDivisorFeaturesEXT feature. * Add missing `structextends="VkDeviceCreateInfo"` to slink:VkPhysicalDeviceShaderDrawParameterFeatures and slink:VkPhysicalDeviceBlendOperationAdvancedFeaturesEXT. New Extensions: * `VK_KHR_memory_model` * `VK_EXT_astc_decode_mode` * `VK_EXT_inline_uniform_block`
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// Copyright (c) 2017-2018 Khronos Group. This work is licensed under a
// Creative Commons Attribution 4.0 International License; see
// http://creativecommons.org/licenses/by/4.0/
include::meta/VK_KHR_vulkan_memory_model.txt[]
*Last Modified Date*::
2018-02-05
*IP Status*::
No known IP claims.
*Interactions and External Dependencies*::
- This extension requires
https://www.khronos.org/registry/spir-v/extensions/KHR/SPV_KHR_vulkan_memory_model.html[+SPV_KHR_vulkan_memory_model+]
*Contributors*::
- Jeff Bolz, NVIDIA
- Alan Baker, Google
- Tobias Hector, AMD
- David Neto, Google
- Robert Simpson, Qualcomm Technologies, Inc.
- Brian Sumner, AMD
(The previous commit didn't actually include internal gitlab changes since 1.1.89; fixed now). Change log for October 28, 2018 Vulkan 1.1.90 spec update: * Update release number to 90. Public Issues: * Tag flink:vkQueueWaitIdle as `externsync` in `vk.xml` (public pull request 815). * Update README (public pull request 834). * `VK_NV_framebuffer_mixed_samples` and `VK_AMD_mixed_attachment_samples` had confusing and contradictory valid usage statements when read in the all-extensions spec build. Change them to explicitly mention which extension each is for (public issue Vulkan-ValidationLayers/issues/353). Internal Issues: * Update `COPYING.md` to clarify how externally generated Vulkan Specifications (for translations, annotations, or other reasons) must be copyrighted, and acknowledge the Exception Clause on the `vk.xml` license (internal issue 1079). * Specify that flink:vkGetPhysicalDeviceImageFormatProperties may: return pname:maxMipLevels 1 if the format is ycbcr (internal issue 1361). * Clarify previously underspecified language for flink:vkCmdPushConstants::pname:pStageFlags regarding use of push constants across multiple pipelines (internal issue 1403). * Fix typo in XML/headers for ename:VK_STRUCTURE_TYPE_IMAGE_DRM_FORMAT_MODIFIER_EXPLICIT_CREATE_INFO_EXT, which was previously etext:VK_STRUCTURE_TYPE_IMAGE_EXCPLICIT_DRM_FORMAT_MODIFIER_CREATE_INFO_EXT (internal issue 1428). * Fix markup of equations that were sporadically breaking the `optimize-pdf` step of PDF generation, due (apparently) to inconsistent treatment of unwrapped multicharacter terms by different LaTeX parsers (internal issue 1435). * For the <<memory-model-synchronizes-with synchronizes-with>> memory model relation cases involving a release barrier plus relaxed atomic write, treat the atomic as if it were a release atomic and allow the acquire side to read from its hypothetical release sequence. This is more consistent with how C++ defines synchronization for release fences (internal issue cross-api/memory-model#72). * Minor editorial changes to the <<memory-model, memory model>> appendix based on external feedback.
2018-10-29 06:53:18 +00:00
The `VK_KHR_vulkan_memory_model` extension allows use of the
Change log for September 8, 2018 Vulkan 1.1.84 spec update: * Update release number to 84. Public Issues: * Fix code sample in the `<<VK_EXT_debug_utils>>` extension (public issue 751). * Fix misleading comment in `vk.xml` for slink:VkDescriptorBufferInfo::pname:buffer (public pull request 762). * Fix formatting of deprecation attributes in schema doc (public pull request 767). * Change `can` to `may` in the description of elink:VkSparseImageFormatFlagBits, which are return values from queries (public pull request 768). * Prettify generated contact list in extension appendices, adding logos and a New Issue link (public pull request 770). * Enable sRGB conversion based on the image view format, not the image format, in the <<textures-format-conversion, Format Conversion>> section (public pull request 773). * Fix typo in equation in the <<primsrast-lines-basic, Basic Line Segment Rasterization>> section (public pull request 780). * Fix special characters in GitHub contacts links (public pull request 783). * Make clean_pdf target remove pdf folder (public pull request 784). * Fix styleguide bad markup of block continuation (public pull request 792). Other Issues: * Allow a zero vertex attribute divisor in the `<<VK_EXT_vertex_attribute_divisor>>` extension, exposed via the slink:VkPhysicalDeviceVertexAttributeDivisorFeaturesEXT feature. * Add missing `structextends="VkDeviceCreateInfo"` to slink:VkPhysicalDeviceShaderDrawParameterFeatures and slink:VkPhysicalDeviceBlendOperationAdvancedFeaturesEXT. New Extensions: * `VK_KHR_memory_model` * `VK_EXT_astc_decode_mode` * `VK_EXT_inline_uniform_block`
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<<memory-model,Vulkan Memory Model>>, which formally defines how to
synchronize memory accesses to the same memory locations performed by
multiple shader invocations.
=== New Enum Constants
* Extending elink:VkStructureType:
** ename:VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_VULKAN_MEMORY_MODEL_FEATURES_KHR
=== New Structures
* slink:VkPhysicalDeviceVulkanMemoryModelFeaturesKHR
=== New SPIR-V Capabilities
* <<spirvenv-capabilities-table-memorymodel,code:VulkanMemoryModelKHR>>
=== Issues
=== Version History
* Revision 1, 2018-06-24 (Jeff Bolz)
- Initial draft