TABLE OF CONTENTS

NAME
SYNOPSIS
DESCRIPTION
ERRORS
NOTES
COPYRIGHT
SEE ALSO

NAME

hbw::allocator - The C++ allocator compatible with the C++ standard library allocator concepts
Note: This is EXPERIMENTAL API. The functionality and the header file itself can be changed (including non-backward compatible changes) or removed.

SYNOPSIS

#include <hbw_allocator.h>

Link with -lmemkind

hbw::allocator();
template <class U>hbw::allocator<T>::allocator(const hbw::allocator<U>&);
hbw::allocator<T>::~allocator()`
hbw::allocator<T>::pointer hbw::allocator<T>::address(hbw::allocator<T>::reference x);
hbw::allocator<T>::const_pointer hbw::allocator<T>::address(hbw::allocator<T>::const_reference x);
hbw::allocator<T>::pointer hbw::allocator<T>::allocate(hbw::allocator<T>::size_type n, const void * = 0);
void hbw::allocator<T>::deallocate(hbw::allocator<T>::pointer p, hbw::allocator<T>::size_type n);
hbw::allocator<T>::size_type hbw::allocator<T>::max_size();
void hbw::allocator<T>::construct(hbw::allocator<T>::pointer p, const hbw::allocator<T>::value_type& val);
void hbw::allocator<T>::destroy(hbw::allocator<T>::pointer p);

DESCRIPTION

The hbw::allocator is intended to be used with STL containers to allocate high bandwidth memory. Memory management is based on hbwmalloc (memkind library), enabling users to gain performance in multithreaded applications. Refer hbwmalloc(3) and memkind(3) man page for more details.

All public member types and functions corresponds to standard library allocator concepts and definitions. The current implementation supports the C++03 standard.

Template arguments:

• T is an object type aliased by value_type.
• U is an object type.

Note:

hbw::allocator<T>::pointer hbw::allocator<T>::allocate(hbw::allocator<T>::size_type n, const void * = 0)

allocates high bandwidth memory using hbw_malloc(). Throw std::bad_alloc when:

• n = 0,
• n > max_size()
• or there is not enough memory to satisfy the request.

hbw::allocator<T>::deallocate(hbw::allocator<T>::pointer p, hbw::allocator<T>::size_type n)

deallocates memory associated with pointer returned by allocate() using hbw_free().

ERRORS

The same as described in ERRORS section of hbwmalloc(3) man page.

NOTES

The hbw::allocator<T> behavior depends on hbwmalloc heap management policy. To get and set the policy please use hbw_get_policy() and hbw_set_policy() respectively.

COPYRIGHT

Copyright (C) 2015 - 2022 Intel Corporation. All rights reserved.

SEE ALSO

hbwmalloc(3), numa(3), numactl(8), memkind(3)