dash::allocator::GlobalAllocationPolicy< allocation_static, synchronization_collective, memory_space_host_tag > Class Template Reference

Public Member Functions
dart_gptr_t	allocate_segment (dart_team_t teamid, LocalMemorySpaceBase< memory_space_tag > *, std::size_t nbytes, std::size_t)
	Variant to allocate symmetrically in global memory space if we allocate in the default Host Space. More...
bool	deallocate_segment (dart_gptr_t gptr, LocalMemorySpaceBase< memory_space_tag > *, void *, size_t, size_t)
	Similar to the allocation case above global memory is deallocated symmetrically in DART. More...

Detailed Description

template<>
class dash::allocator::GlobalAllocationPolicy< allocation_static, synchronization_collective, memory_space_host_tag >

Definition at line 147 of file AllocationPolicy.h.

Member Function Documentation

allocate_segment()

dart_gptr_t dash::allocator::GlobalAllocationPolicy< allocation_static, synchronization_collective, memory_space_host_tag >::allocate_segment ( dart_team_t  teamid, LocalMemorySpaceBase< memory_space_tag > *  , std::size_t  nbytes, std::size_t    )

inline

Variant to allocate symmetrically in global memory space if we allocate in the default Host Space.

In this case DART can allocate symmatrically.

Definition at line 157 of file AllocationPolicy.h.

References DART_GPTR_ISNULL, DART_GPTR_NULL, DART_OK, and dart_team_memalloc_aligned().

  {
    DASH_LOG_DEBUG(
        "GlobalAllocationPolicy.do_global_allocate(nlocal)",
        "number of local values:",
        nbytes);

    dart_gptr_t gptr;

    dash::dart_storage<uint8_t> ds(nbytes);
    if (dart_team_memalloc_aligned(teamid, ds.nelem, ds.dtype, &gptr) !=
        DART_OK) {
      DASH_LOG_ERROR(
          "GlobalAllocationPolicy.do_global_allocate(nlocal)",
          "cannot allocate global memory segment",
          nbytes);
      gptr = DART_GPTR_NULL;
    }

    if (DART_GPTR_ISNULL(gptr)) {
      throw std::bad_alloc{};
    }

    return gptr;
  }

deallocate_segment()

bool dash::allocator::GlobalAllocationPolicy< allocation_static, synchronization_collective, memory_space_host_tag >::deallocate_segment ( dart_gptr_t  gptr, LocalMemorySpaceBase< memory_space_tag > *  , void *  , size_t  , size_t    )

inline

Similar to the allocation case above global memory is deallocated symmetrically in DART.

Definition at line 189 of file AllocationPolicy.h.

References DART_GPTR_ISNULL, DART_OK, and dart_team_memfree().

  {
    DASH_LOG_TRACE(
        "GlobalAllocationPolicy.do_global_deallocate",
        "deallocating memory segment",
        gptr);

    if (DART_GPTR_ISNULL(gptr)) {
      return true;
    }

    auto ret = dart_team_memfree(gptr) == DART_OK;

    return ret;
  }

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

• /tmp/tmporruphar/dash/include/dash/allocator/AllocationPolicy.h