cuda::experimental::stf::buddy_allocator

Defined in include/cuda/experimental/__stf/allocators/buddy_allocator.cuh

class buddy_allocator : public cuda::experimental::stf::block_allocator_interface

Buddy allocator policy which relies on a root allocator to create large buffers which are then suballocated with a buddy allocation algorithm.

Public Functions

buddy_allocator() = default
inline buddy_allocator(block_allocator_untyped root_allocator_)
inline virtual void *allocate(backend_ctx_untyped &ctx, const data_place &memory_node, ::std::ptrdiff_t &s, event_list &prereqs) override

Asynchronous allocation of memory.

This method asynchronously allocates *s bytes on the specified memory node. Upon success, *ptr will contain the address of the allocated buffer. If the allocation fails, *s will contain a negative value.

Parameters

  • ctx – Untyped backend context

  • memory_node – Memory node where the allocation should occur

  • s – Pointer to the size of the allocation

  • prereqs – List of events that should finish before the allocation starts

Returns

void* Pointer to the allocated memory

inline virtual void deallocate(backend_ctx_untyped&, const data_place &memory_node, event_list &prereqs, void *ptr, size_t sz) override

Deallocation of memory.

This method deallocates memory previously allocated by the allocate method.

Parameters

  • ctx – Untyped backend context

  • memory_node – Memory node where the deallocation should occur

  • prereqs – List of events that should finish before the deallocation starts

  • ptr – Pointer to the memory to be deallocated

  • sz – Size of the memory to be deallocated

inline virtual event_list deinit(backend_ctx_untyped &ctx) override

Deinitialization of the allocator.

Returns

List of events indicating that this was deinitialized

inline virtual ::std::string to_string() const override

String representation of the allocator.

This method returns a string representation of the allocator.

Returns

std::string String representation of the allocator

inline virtual void print_info() const

Print information about the allocator.

This method prints information about the allocator to stderr.