Struct demo_vk::graphics::vulkan::Allocator

pub struct Allocator { /* private fields */ }

The Vulkan device memory allocator.

Performance

All Vulkan allocations are serialized into a single queue served by a background thread. This is to simplify the allocator implementation (it’s single-threaded) but it means that allocating tons of memory from many threads could cause bottlenecks. In practice, this doesn’t seem to matter because device allocations are typically fairly long-lived.

Device Memory Usage

The allocator implementation attempts to only allocate large blocks of Device memory, then subdivide them to fit individual allocation requests. This logic is hosted in the private composable_allocator module.

Implementations

impl Allocator

pub fn new( logical_device: Arc<Device>, physical_device: PhysicalDevice, ) -> Result<Self>

pub fn allocate_memory( &self, requirements: &MemoryRequirements, flags: MemoryPropertyFlags, dedicated: bool, ) -> Result<Block>

Allocates device memory according to the given requirements.

pub fn free(&self, block: &Block)

Free the allocated block.

Trait Implementations

impl Debug for Allocator

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Drop for Allocator

fn drop(&mut self)

Executes the destructor for this type.