From 01a0ba193ad9b624a055834cd14af3f1f1b25354 Mon Sep 17 00:00:00 2001 From: Adam Sawicki Date: Thu, 28 Oct 2021 18:25:57 +0200 Subject: [PATCH] Added documentation chapter "Virtual allocator" Regenerated the documentation. --- docs/html/allocation_annotation.html | 16 +- docs/html/choosing_memory_type.html | 16 +- docs/html/custom_memory_pools.html | 16 +- docs/html/defragmentation.html | 20 +- docs/html/index.html | 1 + docs/html/lost_allocations.html | 12 +- docs/html/memory_mapping.html | 20 +- docs/html/quick_start.html | 16 +- docs/html/resource_aliasing.html | 6 +- docs/html/search/all_11.js | 373 +++++++++--------- docs/html/search/pages_b.js | 7 +- ...ct_vma_virtual_allocation_create_info.html | 4 +- docs/html/struct_vma_virtual_block.html | 2 +- docs/html/virtual_allocator.html | 181 +++++++++ docs/html/vk__mem__alloc_8h.html | 4 +- docs/html/vk_khr_dedicated_allocation.html | 2 +- include/vk_mem_alloc.h | 153 +++++++ 17 files changed, 593 insertions(+), 256 deletions(-) create mode 100644 docs/html/virtual_allocator.html diff --git a/docs/html/allocation_annotation.html b/docs/html/allocation_annotation.html index b14a5a2..4851601 100644 --- a/docs/html/allocation_annotation.html +++ b/docs/html/allocation_annotation.html @@ -84,18 +84,18 @@ Allocation user data
VkBuffer buffer;
VmaAllocation allocation;
vmaCreateBuffer(allocator, &bufferInfo, &allocCreateInfo, &buffer, &allocation, nullptr);
-
VmaAllocationCreateInfo
Definition: vk_mem_alloc.h:987
-
VmaAllocationCreateInfo::pUserData
void * pUserData
Custom general-purpose pointer that will be stored in VmaAllocation, can be read as VmaAllocationInfo...
Definition: vk_mem_alloc.h:1026
-
VmaAllocationCreateInfo::usage
VmaMemoryUsage usage
Intended usage of memory.
Definition: vk_mem_alloc.h:995
+
VmaAllocationCreateInfo
Definition: vk_mem_alloc.h:988
+
VmaAllocationCreateInfo::pUserData
void * pUserData
Custom general-purpose pointer that will be stored in VmaAllocation, can be read as VmaAllocationInfo...
Definition: vk_mem_alloc.h:1027
+
VmaAllocationCreateInfo::usage
VmaMemoryUsage usage
Intended usage of memory.
Definition: vk_mem_alloc.h:996
VmaAllocation
Represents single memory allocation.
-
VMA_MEMORY_USAGE_GPU_ONLY
@ VMA_MEMORY_USAGE_GPU_ONLY
Definition: vk_mem_alloc.h:829
+
VMA_MEMORY_USAGE_GPU_ONLY
@ VMA_MEMORY_USAGE_GPU_ONLY
Definition: vk_mem_alloc.h:830
vmaCreateBuffer
VkResult vmaCreateBuffer(VmaAllocator allocator, const VkBufferCreateInfo *pBufferCreateInfo, const VmaAllocationCreateInfo *pAllocationCreateInfo, VkBuffer *pBuffer, VmaAllocation *pAllocation, VmaAllocationInfo *pAllocationInfo)

The pointer may be later retrieved as VmaAllocationInfo::pUserData:

VmaAllocationInfo allocInfo;
vmaGetAllocationInfo(allocator, allocation, &allocInfo);
MyBufferMetadata* pMetadata = (MyBufferMetadata*)allocInfo.pUserData;
-
VmaAllocationInfo
Parameters of VmaAllocation objects, that can be retrieved using function vmaGetAllocationInfo().
Definition: vk_mem_alloc.h:1352
-
VmaAllocationInfo::pUserData
void * pUserData
Custom general-purpose pointer that was passed as VmaAllocationCreateInfo::pUserData or set using vma...
Definition: vk_mem_alloc.h:1401
+
VmaAllocationInfo
Parameters of VmaAllocation objects, that can be retrieved using function vmaGetAllocationInfo().
Definition: vk_mem_alloc.h:1353
+
VmaAllocationInfo::pUserData
void * pUserData
Custom general-purpose pointer that was passed as VmaAllocationCreateInfo::pUserData or set using vma...
Definition: vk_mem_alloc.h:1402
vmaGetAllocationInfo
void vmaGetAllocationInfo(VmaAllocator allocator, VmaAllocation allocation, VmaAllocationInfo *pAllocationInfo)
Returns current information about specified allocation and atomically marks it as used in current fra...

It can also be changed using function vmaSetAllocationUserData().

Values of (non-zero) allocations' pUserData are printed in JSON report created by vmaBuildStatsString(), in hexadecimal form.

@@ -116,9 +116,9 @@ Allocation names
VkImage image;
VmaAllocation allocation;
vmaCreateImage(allocator, &imageInfo, &allocCreateInfo, &image, &allocation, nullptr);
-
VmaAllocationCreateInfo::flags
VmaAllocationCreateFlags flags
Use VmaAllocationCreateFlagBits enum.
Definition: vk_mem_alloc.h:989
+
VmaAllocationCreateInfo::flags
VmaAllocationCreateFlags flags
Use VmaAllocationCreateFlagBits enum.
Definition: vk_mem_alloc.h:990
vmaCreateImage
VkResult vmaCreateImage(VmaAllocator allocator, const VkImageCreateInfo *pImageCreateInfo, const VmaAllocationCreateInfo *pAllocationCreateInfo, VkImage *pImage, VmaAllocation *pAllocation, VmaAllocationInfo *pAllocationInfo)
Function similar to vmaCreateBuffer().
-
VMA_ALLOCATION_CREATE_USER_DATA_COPY_STRING_BIT
@ VMA_ALLOCATION_CREATE_USER_DATA_COPY_STRING_BIT
Definition: vk_mem_alloc.h:932
+
VMA_ALLOCATION_CREATE_USER_DATA_COPY_STRING_BIT
@ VMA_ALLOCATION_CREATE_USER_DATA_COPY_STRING_BIT
Definition: vk_mem_alloc.h:933

The value of pUserData pointer of the allocation will be different than the one you passed when setting allocation's name - pointing to a buffer managed internally that holds copy of the string.

VmaAllocationInfo allocInfo;
vmaGetAllocationInfo(allocator, allocation, &allocInfo);
diff --git a/docs/html/choosing_memory_type.html b/docs/html/choosing_memory_type.html index 541f066..bb85f7b 100644 --- a/docs/html/choosing_memory_type.html +++ b/docs/html/choosing_memory_type.html @@ -93,10 +93,10 @@ Usage
VkBuffer buffer;
VmaAllocation allocation;
vmaCreateBuffer(allocator, &bufferInfo, &allocInfo, &buffer, &allocation, nullptr);
-
VmaAllocationCreateInfo
Definition: vk_mem_alloc.h:987
-
VmaAllocationCreateInfo::usage
VmaMemoryUsage usage
Intended usage of memory.
Definition: vk_mem_alloc.h:995
+
VmaAllocationCreateInfo
Definition: vk_mem_alloc.h:988
+
VmaAllocationCreateInfo::usage
VmaMemoryUsage usage
Intended usage of memory.
Definition: vk_mem_alloc.h:996
VmaAllocation
Represents single memory allocation.
-
VMA_MEMORY_USAGE_GPU_ONLY
@ VMA_MEMORY_USAGE_GPU_ONLY
Definition: vk_mem_alloc.h:829
+
VMA_MEMORY_USAGE_GPU_ONLY
@ VMA_MEMORY_USAGE_GPU_ONLY
Definition: vk_mem_alloc.h:830
vmaCreateBuffer
VkResult vmaCreateBuffer(VmaAllocator allocator, const VkBufferCreateInfo *pBufferCreateInfo, const VmaAllocationCreateInfo *pAllocationCreateInfo, VkBuffer *pBuffer, VmaAllocation *pAllocation, VmaAllocationInfo *pAllocationInfo)

Required and preferred flags

@@ -109,10 +109,10 @@ Required and preferred flags
VkBuffer buffer;
VmaAllocation allocation;
vmaCreateBuffer(allocator, &bufferInfo, &allocInfo, &buffer, &allocation, nullptr);
-
VmaAllocationCreateInfo::preferredFlags
VkMemoryPropertyFlags preferredFlags
Flags that preferably should be set in a memory type chosen for an allocation.
Definition: vk_mem_alloc.h:1005
-
VmaAllocationCreateInfo::requiredFlags
VkMemoryPropertyFlags requiredFlags
Flags that must be set in a Memory Type chosen for an allocation.
Definition: vk_mem_alloc.h:1000
-
VmaAllocationCreateInfo::flags
VmaAllocationCreateFlags flags
Use VmaAllocationCreateFlagBits enum.
Definition: vk_mem_alloc.h:989
-
VMA_ALLOCATION_CREATE_MAPPED_BIT
@ VMA_ALLOCATION_CREATE_MAPPED_BIT
Set this flag to use a memory that will be persistently mapped and retrieve pointer to it.
Definition: vk_mem_alloc.h:906
+
VmaAllocationCreateInfo::preferredFlags
VkMemoryPropertyFlags preferredFlags
Flags that preferably should be set in a memory type chosen for an allocation.
Definition: vk_mem_alloc.h:1006
+
VmaAllocationCreateInfo::requiredFlags
VkMemoryPropertyFlags requiredFlags
Flags that must be set in a Memory Type chosen for an allocation.
Definition: vk_mem_alloc.h:1001
+
VmaAllocationCreateInfo::flags
VmaAllocationCreateFlags flags
Use VmaAllocationCreateFlagBits enum.
Definition: vk_mem_alloc.h:990
+
VMA_ALLOCATION_CREATE_MAPPED_BIT
@ VMA_ALLOCATION_CREATE_MAPPED_BIT
Set this flag to use a memory that will be persistently mapped and retrieve pointer to it.
Definition: vk_mem_alloc.h:907

A memory type is chosen that has all the required flags and as many preferred flags set as possible.

If you use VmaAllocationCreateInfo::usage, it is just internally converted to a set of required and preferred flags.

@@ -127,7 +127,7 @@ Explicit memory types

VkBuffer buffer;
VmaAllocation allocation;
vmaCreateBuffer(allocator, &bufferInfo, &allocInfo, &buffer, &allocation, nullptr);
-
VmaAllocationCreateInfo::memoryTypeBits
uint32_t memoryTypeBits
Bitmask containing one bit set for every memory type acceptable for this allocation.
Definition: vk_mem_alloc.h:1013
+
VmaAllocationCreateInfo::memoryTypeBits
uint32_t memoryTypeBits
Bitmask containing one bit set for every memory type acceptable for this allocation.
Definition: vk_mem_alloc.h:1014

Custom memory pools

If you allocate from custom memory pool, all the ways of specifying memory requirements described above are not applicable and the aforementioned members of VmaAllocationCreateInfo structure are ignored. Memory type is selected explicitly when creating the pool and then used to make all the allocations from that pool. For further details, see Custom memory pools.

diff --git a/docs/html/custom_memory_pools.html b/docs/html/custom_memory_pools.html index 03f6751..c21f2e9 100644 --- a/docs/html/custom_memory_pools.html +++ b/docs/html/custom_memory_pools.html @@ -106,13 +106,13 @@ $(function() {
VmaAllocation alloc;
VmaAllocationInfo allocInfo;
vmaCreateBuffer(allocator, &bufCreateInfo, &allocCreateInfo, &buf, &alloc, &allocInfo);
-
VmaAllocationCreateInfo
Definition: vk_mem_alloc.h:987
-
VmaAllocationCreateInfo::pool
VmaPool pool
Pool that this allocation should be created in.
Definition: vk_mem_alloc.h:1019
+
VmaAllocationCreateInfo
Definition: vk_mem_alloc.h:988
+
VmaAllocationCreateInfo::pool
VmaPool pool
Pool that this allocation should be created in.
Definition: vk_mem_alloc.h:1020
VmaAllocation
Represents single memory allocation.
-
VmaAllocationInfo
Parameters of VmaAllocation objects, that can be retrieved using function vmaGetAllocationInfo().
Definition: vk_mem_alloc.h:1352
-
VmaPoolCreateInfo
Describes parameter of created VmaPool.
Definition: vk_mem_alloc.h:1153
-
VmaPoolCreateInfo::memoryTypeIndex
uint32_t memoryTypeIndex
Vulkan memory type index to allocate this pool from.
Definition: vk_mem_alloc.h:1156
-
VmaPoolCreateInfo::maxBlockCount
size_t maxBlockCount
Maximum number of blocks that can be allocated in this pool. Optional.
Definition: vk_mem_alloc.h:1181
+
VmaAllocationInfo
Parameters of VmaAllocation objects, that can be retrieved using function vmaGetAllocationInfo().
Definition: vk_mem_alloc.h:1353
+
VmaPoolCreateInfo
Describes parameter of created VmaPool.
Definition: vk_mem_alloc.h:1154
+
VmaPoolCreateInfo::memoryTypeIndex
uint32_t memoryTypeIndex
Vulkan memory type index to allocate this pool from.
Definition: vk_mem_alloc.h:1157
+
VmaPoolCreateInfo::maxBlockCount
size_t maxBlockCount
Maximum number of blocks that can be allocated in this pool. Optional.
Definition: vk_mem_alloc.h:1182
VmaPool
Represents custom memory pool.
vmaCreatePool
VkResult vmaCreatePool(VmaAllocator allocator, const VmaPoolCreateInfo *pCreateInfo, VmaPool *pPool)
Allocates Vulkan device memory and creates VmaPool object.
vmaCreateBuffer
VkResult vmaCreateBuffer(VmaAllocator allocator, const VkBufferCreateInfo *pBufferCreateInfo, const VmaAllocationCreateInfo *pAllocationCreateInfo, VkBuffer *pBuffer, VmaAllocation *pAllocation, VmaAllocationInfo *pAllocationInfo)
@@ -137,8 +137,8 @@ Choosing memory type index
VmaPoolCreateInfo poolCreateInfo = {};
poolCreateInfo.memoryTypeIndex = memTypeIndex;
// ...
-
VmaAllocationCreateInfo::usage
VmaMemoryUsage usage
Intended usage of memory.
Definition: vk_mem_alloc.h:995
-
VMA_MEMORY_USAGE_GPU_ONLY
@ VMA_MEMORY_USAGE_GPU_ONLY
Definition: vk_mem_alloc.h:829
+
VmaAllocationCreateInfo::usage
VmaMemoryUsage usage
Intended usage of memory.
Definition: vk_mem_alloc.h:996
+
VMA_MEMORY_USAGE_GPU_ONLY
@ VMA_MEMORY_USAGE_GPU_ONLY
Definition: vk_mem_alloc.h:830
vmaFindMemoryTypeIndexForBufferInfo
VkResult vmaFindMemoryTypeIndexForBufferInfo(VmaAllocator allocator, const VkBufferCreateInfo *pBufferCreateInfo, const VmaAllocationCreateInfo *pAllocationCreateInfo, uint32_t *pMemoryTypeIndex)
Helps to find memoryTypeIndex, given VkBufferCreateInfo and VmaAllocationCreateInfo.

When creating buffers/images allocated in that pool, provide following parameters:

+
  • Virtual allocator
  • Debugging incorrect memory usage