cuda::experimental::mr::async_memory_pool
Defined in /home/runner/work/cccl/cccl/cudax/include/cuda/experimental/__memory_resource/async_memory_pool.cuh
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class async_memory_pool
async_memory_pool
is an owning wrapper around a cudaMemPool_t.It handles creation and destruction of the underlying pool utilizing the provided
async_memory_pool_properties
.Public Functions
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inline explicit async_memory_pool(const ::cuda::experimental::device_ref __device_id, async_memory_pool_properties __properties = {})
Constructs a
async_memory_pool
with the optionally specified initial pool size and release threshold. If the pool size grows beyond the release threshold, unused memory held by the pool will be released at the next synchronization event.- Throws
cuda_error – if the CUDA version does not support
cudaMallocAsync
.- Parameters
__device_id – The device id of the device the stream pool is constructed on.
__pool_properties – Optional, additional properties of the pool to be created.
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async_memory_pool(::cudaMemPool_t) = delete
Disables construction from a plain
cudaMemPool_t
. We want to ensure clean ownership semantics.
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async_memory_pool(async_memory_pool const&) = delete
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async_memory_pool(async_memory_pool&&) = delete
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async_memory_pool &operator=(async_memory_pool const&) = delete
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async_memory_pool &operator=(async_memory_pool&&) = delete
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inline ~async_memory_pool() noexcept
Destroys the
async_memory_pool
by releasing the internalcudaMemPool_t
.
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inline void trim_to(const size_t __min_bytes_to_keep)
Tries to release memory.
Note
If the pool has less than
__minBytesToKeep
reserved, the trim_to operation is a no-op. Otherwise the pool will be guaranteed to have at least__minBytesToKeep
bytes reserved after the operation.- Parameters
__min_bytes_to_keep – the minimal guaranteed size of the pool.
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inline size_t get_attribute(::cudaMemPoolAttr __attr) const
Gets the value of an attribute of the pool.
- Parameters
__attribute – the attribute to be set.
- Returns
The value of the attribute. For boolean attributes any value not equal to 0 equates to true.
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inline void set_attribute(::cudaMemPoolAttr __attr, size_t __value)
Sets an attribute of the pool to a given value.
Note
For boolean attributes any non-zero value equates to true.
- Parameters
__attribute – the attribute to be set.
__value – the new value of that attribute.
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inline constexpr bool operator==(async_memory_pool const &__rhs) const noexcept
Equality comparison with another
async_memory_pool
.- Returns
true if the stored
cudaMemPool_t
are equal.
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inline constexpr bool operator==(async_memory_pool const &__lhs, ::cudaMemPool_t __rhs) noexcept
Equality comparison with a
cudaMemPool_t
.- Parameters
__rhs – A
cudaMemPool_t
.- Returns
true if the stored
cudaMemPool_t
is equal to__rhs
.
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inline constexpr cudaMemPool_t get() const noexcept
Returns the underlying handle to the CUDA memory pool.
Public Static Functions
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static inline async_memory_pool from_native_handle(::cudaMemPool_t __handle) noexcept
Construct an
async_memory_pool
object from a nativecudaMemPool_t
handle.Note
The constructed
async_memory_pool
object takes ownership of the native handle.- Parameters
__handle – The native handle
- Returns
The constructed
async_memory_pool
object
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static async_memory_pool from_native_handle(int) = delete
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static async_memory_pool from_native_handle(cuda::std::nullptr_t) = delete
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inline explicit async_memory_pool(const ::cuda::experimental::device_ref __device_id, async_memory_pool_properties __properties = {})