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VulkanMemoryAllocator/docs/Recording file format.md

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This is an official documentation for file format used by Vulkan Memory Allocator library to record and replay sequence of calls to its functions. This feature can be enabled by using VmaAllocatorCreateInfo::pRecordSettings structure members. For details, see main documentation of the library. Playback can be launched using VmaReplay console application.

Recording is a text file. Line endings: Unix '\n'. Character encoding: single-byte (can be ASCII or UTF-8, whaterver you use in custom strings). Suggested file extension: csv. File can be processed sequentially - no random access is needed. Each line forms a separate entry. Each line consists of a set of values (also called columns), separated by comma ',' (hence "CSV" format - Comma Separated Values). Number of columns is different in different lines.

Header

First line identifies file format. It must always be:

Vulkan Memory Allocator,Calls recording

Second line identifies format version, where first column is major version and second column is minor version. Formats with only minor version incremented are backward compatible. VmaReplay application supports all older versions. Current version is:

1,2

Function calls

Remaining lines contain recorded calls to VMA functions. First columns are always:

  • Thread ID : uint32
  • Time since first call : float, in seconds
  • VMA frame index : uint32
  • Function name : string

Remaining columns are function parameters and output, depending on function name, which can be:

vmaCreateAllocator, vmaDestroyAllocator

No parameters.

vmaCreatePool

  • memoryTypeIndex : uint32
  • flags : uint32
  • blockSize : uint64
  • minBlockCount : uint64
  • maxBlockCount : uint64
  • frameInUseCount : uint32
  • pool (output) : pointer

vmaDestroyPool

  • pool : pointer

vmaSetAllocationUserData

  • allocation : pointer
  • pUserData : string (may contain additional commas)

vmaCreateBuffer

  • bufferCreateInfo.flags : uint32
  • bufferCreateInfo.size : uint64
  • bufferCreateInfo.usage : uint32
  • bufferCreateInfo.sharingMode : uint32
  • allocationCreateInfo.flags : uint32
  • allocationCreateInfo.usage : uint32
  • allocationCreateInfo.requiredFlags : uint32
  • allocationCreateInfo.preferredFlags : uint32
  • allocationCreateInfo.memoryTypeBits : uint32
  • allocationCreateInfo.pool : pointer
  • allocation (output) : pointer
  • allocationCreateInfo.pUserData : string (may contain additional commas)

vmaDestroyBuffer

  • allocation : pointer

vmaCreateImage

  • imageCreateInfo.flags : uint32
  • imageCreateInfo.imageType : uint32
  • imageCreateInfo.format : uint32
  • imageCreateInfo.extent.width : uint32
  • imageCreateInfo.extent.height : uint32
  • imageCreateInfo.extent.depth : uint32
  • imageCreateInfo.mipLevels : uint32
  • imageCreateInfo.arrayLayers : uint32
  • imageCreateInfo.samples : uint32
  • imageCreateInfo.tiling : uint32
  • imageCreateInfo.usage : uint32
  • imageCreateInfo.sharingMode : uint32
  • imageCreateInfo.initialLayout : uint32
  • allocationCreateInfo.flags : uint32
  • allocationCreateInfo.usage : uint32
  • allocationCreateInfo.requiredFlags : uint32
  • allocationCreateInfo.preferredFlags : uint32
  • allocationCreateInfo.memoryTypeBits : uint32
  • allocationCreateInfo.pool : pointer
  • allocation (output) : pointer
  • allocationCreateInfo.pUserData : string (may contain additional commas)

vmaDestroyImage

  • allocation : pointer

vmaFreeMemory (min format version 1.1)

  • allocation : pointer

vmaCreateLostAllocation (min format version 1.2)

  • allocation (output) : pointer

vmaAllocateMemory (min format version 1.2)

  • vkMemoryRequirements.size : uint64
  • vkMemoryRequirements.alignment : uint64
  • vkMemoryRequirements.memoryTypeBits : uint32
  • allocationCreateInfo.flags : uint32
  • allocationCreateInfo.usage : uint32
  • allocationCreateInfo.requiredFlags : uint32
  • allocationCreateInfo.preferredFlags : uint32
  • allocationCreateInfo.memoryTypeBits : uint32
  • allocationCreateInfo.pool : pointer
  • allocation (output) : pointer
  • allocationCreateInfo.pUserData : string (may contain additional commas)

vmaAllocateMemoryForBuffer, vmaAllocateMemoryForImage (min format version 1.2)

  • vkMemoryRequirements.size : uint64
  • vkMemoryRequirements.alignment : uint64
  • vkMemoryRequirements.memoryTypeBits : uint32
  • requiresDedicatedAllocation : bool
  • prefersDedicatedAllocation : bool
  • allocationCreateInfo.flags : uint32
  • allocationCreateInfo.usage : uint32
  • allocationCreateInfo.requiredFlags : uint32
  • allocationCreateInfo.preferredFlags : uint32
  • allocationCreateInfo.memoryTypeBits : uint32
  • allocationCreateInfo.pool : pointer
  • allocation (output) : pointer
  • allocationCreateInfo.pUserData : string (may contain additional commas)

vmaMapMemory, vmaUnmapMemory (min format version 1.2)

  • allocation : pointer

vmaFlushAllocation, vmaInvalidateAllocation (min format version 1.2)

  • allocation : pointer
  • offset : uint64
  • size : uint64

Data types

bool

Encoded as 0 for false or 1 for true.

uint32, uint64

Encoded in decimal format.

pointer

Encoded in hexadecimal format.

pUserData

If pUserData was a pointer, it is encoded as hexadecimal string. If VMA_ALLOCATION_CREATE_USER_DATA_COPY_STRING_BIT was used with the allocation, the string is written as-is. It may contain additional commas. It should not contain end-of-line characters - results are then undefined.