rmm::mr::tracking_resource_adaptor< Upstream > Class Template Reference

Resource that uses Upstream to allocate memory and tracks allocations. More...

#include <tracking_resource_adaptor.hpp>

Inheritance diagram for rmm::mr::tracking_resource_adaptor< Upstream >:

Collaboration diagram for rmm::mr::tracking_resource_adaptor< Upstream >:

Classes
struct	allocation_info
	Information stored about an allocation. Includes the size and a stack trace if the tracking_resource_adaptor was initialized to capture stacks. More...

Public Types
using	read_lock_t = std::shared_lock< std::shared_timed_mutex >
	Type of lock used to synchronize read access.
using	write_lock_t = std::unique_lock< std::shared_timed_mutex >
	Type of lock used to synchronize write access.

Public Member Functions
	tracking_resource_adaptor (Upstream *upstream, bool capture_stacks=false)
	Construct a new tracking resource adaptor using upstream to satisfy allocation requests. More...
	tracking_resource_adaptor (tracking_resource_adaptor const &)=delete
	tracking_resource_adaptor (tracking_resource_adaptor &&) noexcept=default
	Default move constructor.
tracking_resource_adaptor &	operator= (tracking_resource_adaptor const &)=delete
tracking_resource_adaptor &	operator= (tracking_resource_adaptor &&) noexcept=default
	Default move assignment operator. More...
Upstream *	get_upstream () const noexcept
	Pointer to the upstream resource. More...
bool	supports_streams () const noexcept override
	Checks whether the upstream resource supports streams. More...
bool	supports_get_mem_info () const noexcept override
	Query whether the resource supports the get_mem_info API. More...
std::map< void *, allocation_info > const &	get_outstanding_allocations () const noexcept
	Get the outstanding allocations map. More...
std::size_t	get_allocated_bytes () const noexcept
	Query the number of bytes that have been allocated. Note that this can not be used to know how large of an allocation is possible due to both possible fragmentation and also internal page sizes and alignment that is not tracked by this allocator. More...
std::string	get_outstanding_allocations_str () const
	Gets a string containing the outstanding allocation pointers, their size, and optionally the stack trace for when each pointer was allocated. More...
void	log_outstanding_allocations () const
	Log any outstanding allocations via RMM_LOG_DEBUG.
Public Member Functions inherited from rmm::mr::device_memory_resource
	device_memory_resource (device_memory_resource const &)=default
	Default copy constructor.
	device_memory_resource (device_memory_resource &&) noexcept=default
	Default move constructor.
device_memory_resource &	operator= (device_memory_resource const &)=default
	Default copy assignment operator. More...
device_memory_resource &	operator= (device_memory_resource &&) noexcept=default
	Default move assignment operator. More...
void *	allocate (std::size_t bytes, cuda_stream_view stream=cuda_stream_view{})
	Allocates memory of size at least bytes. More...
void	deallocate (void *ptr, std::size_t bytes, cuda_stream_view stream=cuda_stream_view{})
	Deallocate memory pointed to by p. More...
bool	is_equal (device_memory_resource const &other) const noexcept
	Compare this resource to another. More...
void *	allocate (std::size_t bytes, std::size_t alignment)
	Allocates memory of size at least bytes. More...
void	deallocate (void *ptr, std::size_t bytes, std::size_t alignment)
	Deallocate memory pointed to by p. More...
void *	allocate_async (std::size_t bytes, std::size_t alignment, cuda_stream_view stream)
	Allocates memory of size at least bytes. More...
void *	allocate_async (std::size_t bytes, cuda_stream_view stream)
	Allocates memory of size at least bytes. More...
void	deallocate_async (void *ptr, std::size_t bytes, std::size_t alignment, cuda_stream_view stream)
	Deallocate memory pointed to by p. More...
void	deallocate_async (void *ptr, std::size_t bytes, cuda_stream_view stream)
	Deallocate memory pointed to by p. More...
bool	operator== (device_memory_resource const &other) const noexcept
	Comparison operator with another device_memory_resource. More...
bool	operator!= (device_memory_resource const &other) const noexcept
	Comparison operator with another device_memory_resource. More...
std::pair< std::size_t, std::size_t >	get_mem_info (cuda_stream_view stream) const
	Queries the amount of free and total memory for the resource. More...

Detailed Description

template<typename Upstream>
class rmm::mr::tracking_resource_adaptor< Upstream >

Resource that uses Upstream to allocate memory and tracks allocations.

An instance of this resource can be constructed with an existing, upstream resource in order to satisfy allocation requests, but any existing allocations will be untracked. Tracking stores a size and pointer for every allocation, and a stack frame if capture_stacks is true, so it can add significant overhead. tracking_resource_adaptor is intended as a debug adaptor and shouldn't be used in performance-sensitive code. Note that callstacks may not contain all symbols unless the project is linked with -rdynamic. This can be accomplished with add_link_options(-rdynamic) in cmake.

Template Parameters

Upstream

Type of the upstream resource used for allocation/deallocation.

Constructor & Destructor Documentation

tracking_resource_adaptor()

template<typename Upstream >

rmm::mr::tracking_resource_adaptor< Upstream >::tracking_resource_adaptor ( Upstream *  upstream, bool  capture_stacks = false  )

inline

Construct a new tracking resource adaptor using upstream to satisfy allocation requests.

Exceptions

rmm::logic_error

if upstream == nullptr

Parameters

upstream	The resource used for allocating/deallocating device memory
capture_stacks	If true, capture stacks for allocation calls

Member Function Documentation

get_allocated_bytes()

template<typename Upstream >

std::size_t rmm::mr::tracking_resource_adaptor< Upstream >::get_allocated_bytes ( ) const

inlinenoexcept

Query the number of bytes that have been allocated. Note that this can not be used to know how large of an allocation is possible due to both possible fragmentation and also internal page sizes and alignment that is not tracked by this allocator.

Returns

std::size_t number of bytes that have been allocated through this allocator.

get_outstanding_allocations()

template<typename Upstream >

std::map<void*, allocation_info> const& rmm::mr::tracking_resource_adaptor< Upstream >::get_outstanding_allocations ( ) const

inlinenoexcept

Get the outstanding allocations map.

Returns

std::map<void*, allocation_info> const& of a map of allocations. The key is the allocated memory pointer and the data is the allocation_info structure, which contains size and, potentially, stack traces.

get_outstanding_allocations_str()

template<typename Upstream >

std::string rmm::mr::tracking_resource_adaptor< Upstream >::get_outstanding_allocations_str ( ) const

inline

Gets a string containing the outstanding allocation pointers, their size, and optionally the stack trace for when each pointer was allocated.

Stack traces are only included if this resource adaptor was created with capture_stack == true. Otherwise, outstanding allocation pointers will be shown with their size and empty stack traces.

Returns

std::string Containing the outstanding allocation pointers.

get_upstream()

template<typename Upstream >

Upstream* rmm::mr::tracking_resource_adaptor< Upstream >::get_upstream ( ) const

inlinenoexcept

Pointer to the upstream resource.

Returns

Pointer to the upstream resource

operator=()

template<typename Upstream >

tracking_resource_adaptor& rmm::mr::tracking_resource_adaptor< Upstream >::operator= ( tracking_resource_adaptor< Upstream > &&  )

defaultnoexcept

Default move assignment operator.

Returns

tracking_resource_adaptor& Reference to the assigned object

supports_get_mem_info()

template<typename Upstream >

bool rmm::mr::tracking_resource_adaptor< Upstream >::supports_get_mem_info ( ) const

inlineoverridevirtualnoexcept

Query whether the resource supports the get_mem_info API.

Returns

bool true if the upstream resource supports get_mem_info, false otherwise.

Implements rmm::mr::device_memory_resource.

supports_streams()

template<typename Upstream >

bool rmm::mr::tracking_resource_adaptor< Upstream >::supports_streams ( ) const

inlineoverridevirtualnoexcept

Checks whether the upstream resource supports streams.

Returns

true The upstream resource supports streams

false The upstream resource does not support streams.

Implements rmm::mr::device_memory_resource.

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The documentation for this class was generated from the following file:

• tracking_resource_adaptor.hpp