Vulkan-Docs/doc/specs/vulkan/appendices/VK_KHX_device_group_creation.txt

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Change log for February 27, 2017 Vulkan 1.0.42 spec update: * Bump API patch number and header version number to 42 for this update (the first anniversary edition). Github Issues: * Changed asciidoctor macros so cross-page links in the standalone reference pages function properly (public issue 462). Internal Issues: * Clarified host visibility discussion for slink:VkMemoryType, flink:vkInvalidateMappedMemoryRanges, elink:VkAccessFlagBits, and the <<synchronization-framebuffer-regions,Framebuffer Region Dependencies>> section, removing duplicated information and adding a central definition in the access types section (internal issue 552). * Change description of slink:vkGetPhysicalDeviceSurfacePresentModesKHR::pname:pPresentModes to return an array of values, not structures (internal issue 699). New Extensions: * Add a NOTE to the <<extensions,Layers & Extensions>> chapter describing the experimental status of `KHX` extensions. * Add new Khronos, Khronos Experimental, and vendor Vulkan extensions for release at GDC: ** VK_KHR_descriptor_update_template ** VK_KHR_push_descriptor ** VK_KHX_device_group ** VK_KHX_device_group_creation ** VK_KHX_external_memory ** VK_KHX_external_memory_capabilities ** VK_KHX_external_memory_fd ** VK_KHX_external_memory_win32 ** VK_KHX_external_semaphore ** VK_KHX_external_semaphore_capabilities ** VK_KHX_external_semaphore_fd ** VK_KHX_external_semaphore_win32 ** VK_KHX_multiview ** VK_KHX_win32_keyed_mutex ** VK_EXT_discard_rectangles ** VK_MVK_ios_surface ** VK_MVK_macos_surface ** VK_NVX_multiview_per_view_attributes ** VK_NV_clip_space_w_scaling ** VK_NV_geometry_shader_passthrough ** VK_NV_sample_mask_override_coverage ** VK_NV_viewport_array2 ** VK_NV_viewport_swizzle * Add new GLSL vendor extensions to support new builtin variables: ** GL_EXT_device_group ** GL_EXT_multiview
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// Copyright (c) 2016-2017 The Khronos Group Inc.
// Copyright notice at https://www.khronos.org/registry/speccopyright.html
[[VK_KHX_device_group_creation]]
== VK_KHX_device_group_creation
*Name String*::
+VK_KHX_device_group_creation+
*Extension Type*::
Instance extension
*Registered Extension Number*::
71
*Status*::
Draft.
*Last Modified Date*::
2016-10-19
*Revision*::
1
*IP Status*::
No known IP claims.
*Dependencies*::
- This extension is written against version 1.0 of the Vulkan API.
*Contributors*::
- Jeff Bolz, NVIDIA
*Contacts*::
- Jeff Bolz (jbolz 'at' nvidia.com)
This extension provides instance-level commands to enumerate groups of
physical devices, and to create a logical device from a subset of one of
those groups.
Such a logical device can then be used with new features in the
VK_KHX_device_group extension.
=== New Object Types
None.
=== New Enum Constants
Change log for June 4, 2017 Vulkan 1.0.51 spec update: * Bump API patch number and header version number to 51 for this update. Github Issues: * Add Valid Usage statement to flink:vkCmdResolveImage to require that source and destination image formats match (public issue 492). * Specify that a code:char* parameter must: be a valid null-terminated string in the <<fundamentals-implicit-validity, implicit valid usage>> section (public issue 494). * Removed unnecessary VU for slink:VkPhysicalDeviceFeatures which is covered by ename:VK_ERROR_FEATURE_NOT_PRESENT already (public issue 496). * Clarify valid usage of pname:pQueueFamilyIndices in slink:VkBufferCreateInfo, slink:VkImageCreateInfo, and slink:VkSwapchainCreateInfoKHR (public issue 501). * Document that dependencies of enabled extensions must also be enabled in the <<extended-functionality-extensions-dependencies, Extension Dependencies>> section (public issue 507). Internal Issues: * Change slink:VkMappedMemoryRange valid usage to allow pname:offset + pname:size == size of the allocation. Also, if ename:VK_WHOLE_SIZE is used, require the end of the mapping to be aligned to a multiple of pname:nonCoherentAtomSize (internal issue 611). * Add issue to `VK_KHR_win32_surface` about reusing window objects from a different graphics API or Vulkan ICD (internal issue 639). * Require locations on user in/out in `GL_KHR_vulkan_glsl` (internal issue 783). * Added version info to the json validation output, and updated the schema to match (internal issue 838). * Restructure enumerated type descriptions separately from the command or structure they are used in, allowing better reference page generation (internal issue 841). * Re-sort extension appendices to be in alphabetical order within each author ID section. * Fix enum naming and clarify behavior for `VK_NVX_device_generated_commands` extension. New Extensions:
2017-06-04 20:48:43 -07:00
* Extending elink:VkStructureType:
Change log for February 27, 2017 Vulkan 1.0.42 spec update: * Bump API patch number and header version number to 42 for this update (the first anniversary edition). Github Issues: * Changed asciidoctor macros so cross-page links in the standalone reference pages function properly (public issue 462). Internal Issues: * Clarified host visibility discussion for slink:VkMemoryType, flink:vkInvalidateMappedMemoryRanges, elink:VkAccessFlagBits, and the <<synchronization-framebuffer-regions,Framebuffer Region Dependencies>> section, removing duplicated information and adding a central definition in the access types section (internal issue 552). * Change description of slink:vkGetPhysicalDeviceSurfacePresentModesKHR::pname:pPresentModes to return an array of values, not structures (internal issue 699). New Extensions: * Add a NOTE to the <<extensions,Layers & Extensions>> chapter describing the experimental status of `KHX` extensions. * Add new Khronos, Khronos Experimental, and vendor Vulkan extensions for release at GDC: ** VK_KHR_descriptor_update_template ** VK_KHR_push_descriptor ** VK_KHX_device_group ** VK_KHX_device_group_creation ** VK_KHX_external_memory ** VK_KHX_external_memory_capabilities ** VK_KHX_external_memory_fd ** VK_KHX_external_memory_win32 ** VK_KHX_external_semaphore ** VK_KHX_external_semaphore_capabilities ** VK_KHX_external_semaphore_fd ** VK_KHX_external_semaphore_win32 ** VK_KHX_multiview ** VK_KHX_win32_keyed_mutex ** VK_EXT_discard_rectangles ** VK_MVK_ios_surface ** VK_MVK_macos_surface ** VK_NVX_multiview_per_view_attributes ** VK_NV_clip_space_w_scaling ** VK_NV_geometry_shader_passthrough ** VK_NV_sample_mask_override_coverage ** VK_NV_viewport_array2 ** VK_NV_viewport_swizzle * Add new GLSL vendor extensions to support new builtin variables: ** GL_EXT_device_group ** GL_EXT_multiview
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** ename:VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_GROUP_PROPERTIES_KHX
Change log for June 4, 2017 Vulkan 1.0.51 spec update: * Bump API patch number and header version number to 51 for this update. Github Issues: * Add Valid Usage statement to flink:vkCmdResolveImage to require that source and destination image formats match (public issue 492). * Specify that a code:char* parameter must: be a valid null-terminated string in the <<fundamentals-implicit-validity, implicit valid usage>> section (public issue 494). * Removed unnecessary VU for slink:VkPhysicalDeviceFeatures which is covered by ename:VK_ERROR_FEATURE_NOT_PRESENT already (public issue 496). * Clarify valid usage of pname:pQueueFamilyIndices in slink:VkBufferCreateInfo, slink:VkImageCreateInfo, and slink:VkSwapchainCreateInfoKHR (public issue 501). * Document that dependencies of enabled extensions must also be enabled in the <<extended-functionality-extensions-dependencies, Extension Dependencies>> section (public issue 507). Internal Issues: * Change slink:VkMappedMemoryRange valid usage to allow pname:offset + pname:size == size of the allocation. Also, if ename:VK_WHOLE_SIZE is used, require the end of the mapping to be aligned to a multiple of pname:nonCoherentAtomSize (internal issue 611). * Add issue to `VK_KHR_win32_surface` about reusing window objects from a different graphics API or Vulkan ICD (internal issue 639). * Require locations on user in/out in `GL_KHR_vulkan_glsl` (internal issue 783). * Added version info to the json validation output, and updated the schema to match (internal issue 838). * Restructure enumerated type descriptions separately from the command or structure they are used in, allowing better reference page generation (internal issue 841). * Re-sort extension appendices to be in alphabetical order within each author ID section. * Fix enum naming and clarify behavior for `VK_NVX_device_generated_commands` extension. New Extensions:
2017-06-04 20:48:43 -07:00
* Extending elink:VkMemoryHeapFlagBits
Change log for February 27, 2017 Vulkan 1.0.42 spec update: * Bump API patch number and header version number to 42 for this update (the first anniversary edition). Github Issues: * Changed asciidoctor macros so cross-page links in the standalone reference pages function properly (public issue 462). Internal Issues: * Clarified host visibility discussion for slink:VkMemoryType, flink:vkInvalidateMappedMemoryRanges, elink:VkAccessFlagBits, and the <<synchronization-framebuffer-regions,Framebuffer Region Dependencies>> section, removing duplicated information and adding a central definition in the access types section (internal issue 552). * Change description of slink:vkGetPhysicalDeviceSurfacePresentModesKHR::pname:pPresentModes to return an array of values, not structures (internal issue 699). New Extensions: * Add a NOTE to the <<extensions,Layers & Extensions>> chapter describing the experimental status of `KHX` extensions. * Add new Khronos, Khronos Experimental, and vendor Vulkan extensions for release at GDC: ** VK_KHR_descriptor_update_template ** VK_KHR_push_descriptor ** VK_KHX_device_group ** VK_KHX_device_group_creation ** VK_KHX_external_memory ** VK_KHX_external_memory_capabilities ** VK_KHX_external_memory_fd ** VK_KHX_external_memory_win32 ** VK_KHX_external_semaphore ** VK_KHX_external_semaphore_capabilities ** VK_KHX_external_semaphore_fd ** VK_KHX_external_semaphore_win32 ** VK_KHX_multiview ** VK_KHX_win32_keyed_mutex ** VK_EXT_discard_rectangles ** VK_MVK_ios_surface ** VK_MVK_macos_surface ** VK_NVX_multiview_per_view_attributes ** VK_NV_clip_space_w_scaling ** VK_NV_geometry_shader_passthrough ** VK_NV_sample_mask_override_coverage ** VK_NV_viewport_array2 ** VK_NV_viewport_swizzle * Add new GLSL vendor extensions to support new builtin variables: ** GL_EXT_device_group ** GL_EXT_multiview
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** ename:VK_MEMORY_HEAP_MULTI_INSTANCE_BIT_KHX
=== New Enums
None.
=== New Structures
* slink:VkPhysicalDeviceGroupPropertiesKHX
* slink:VkDeviceGroupDeviceCreateInfoKHX
=== New Functions
* flink:vkEnumeratePhysicalDeviceGroupsKHX
=== Issues
None.
=== Examples
[source,c++]
----------------------------------------
VkDeviceCreateInfo devCreateInfo = { VK_STRUCTURE_TYPE_DEVICE_CREATE_INFO };
// (not shown) fill out devCreateInfo as usual.
uint32_t deviceGroupCount = 0;
VkPhysicalDeviceGroupPropertiesKHX *props = NULL;
// Query the number of device groups
vkEnumeratePhysicalDeviceGroupsKHX(g_vkInstance, &deviceGroupCount, NULL);
// Allocate and initialize structures to query the device groups
props = (VkPhysicalDeviceGroupPropertiesKHX *)malloc(deviceGroupCount*sizeof(VkPhysicalDeviceGroupPropertiesKHX));
for (i = 0; i < deviceGroupCount; ++i) {
props[i].sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_GROUP_PROPERTIES_KHX;
props[i].pNext = NULL;
}
vkEnumeratePhysicalDeviceGroupsKHX(g_vkInstance, &deviceGroupCount, props);
// If the first device group has more than one physical device. create
// a logical device using all of the physical devices.
VkDeviceGroupDeviceCreateInfoKHX deviceGroupInfo = { VK_STRUCTURE_TYPE_DEVICE_GROUP_DEVICE_CREATE_INFO_KHX };
if (props[0].physicalDeviceCount > 1) {
deviceGroupInfo.physicalDeviceCount = props[0].physicalDeviceCount;
deviceGroupInfo.pPhysicalDevices = props[0].physicalDevices;
devCreateInfo.pNext = &deviceGroupInfo;
}
vkCreateDevice(props[0].physicalDevices[0], &devCreateInfo, NULL, &g_vkDevice);
free(props);
----------------------------------------
=== Version History
* Revision 1, 2016-10-19 (Jeff Bolz)
- Internal revisions