Kokkos_HBWSpace.hpp

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#ifndef KOKKOS_HBWSPACE_HPP
#define KOKKOS_HBWSPACE_HPP
 
#include <Kokkos_Macros.hpp>
#ifdef KOKKOS_ENABLE_HBWSPACE
 
#include <Kokkos_HostSpace.hpp>
 
namespace Kokkos {
 
namespace Experimental {
 
namespace Impl {
 
void init_lock_array_hbw_space();
 
bool lock_address_hbw_space(void* ptr);
 
void unlock_address_hbw_space(void* ptr);
 
}  // namespace Impl
 
}  // namespace Experimental
 
}  // namespace Kokkos
 
namespace Kokkos {
 
namespace Experimental {
 
class HBWSpace {
 public:
  using memory_space = HBWSpace;
  using size_type    = size_t;
 
  using execution_space = Kokkos::DefaultHostExecutionSpace;
 
  using device_type = Kokkos::Device<execution_space, memory_space>;
 
  HBWSpace();
  HBWSpace(const HBWSpace& rhs) = default;
  HBWSpace& operator=(const HBWSpace&) = default;
  ~HBWSpace()                          = default;
 
  enum AllocationMechanism {
    STD_MALLOC,
    POSIX_MEMALIGN,
    POSIX_MMAP,
    INTEL_MM_ALLOC
  };
 
  explicit HBWSpace(const AllocationMechanism&);
 
  void* allocate(const size_t arg_alloc_size) const;
  void* allocate(const char* arg_label, const size_t arg_alloc_size,
                 const size_t arg_logical_size = 0) const;
 
  void deallocate(void* const arg_alloc_ptr, const size_t arg_alloc_size) const;
  void deallocate(const char* arg_label, void* const arg_alloc_ptr,
                  const size_t arg_alloc_size,
                  const size_t arg_logical_size = 0) const;
 
 private:
  template <class, class, class, class>
  friend class LogicalMemorySpace;
 
  void* impl_allocate(const char* arg_label, const size_t arg_alloc_size,
                      const size_t arg_logical_size = 0,
                      const Kokkos::Tools::SpaceHandle =
                          Kokkos::Tools::make_space_handle(name())) const;
  void impl_deallocate(const char* arg_label, void* const arg_alloc_ptr,
                       const size_t arg_alloc_size,
                       const size_t arg_logical_size = 0,
                       const Kokkos::Tools::SpaceHandle =
                           Kokkos::Tools::make_space_handle(name())) const;
 
 public:
  static constexpr const char* name() { return "HBW"; }
 
 private:
  AllocationMechanism m_alloc_mech;
  friend class Kokkos::Impl::SharedAllocationRecord<
      Kokkos::Experimental::HBWSpace, void>;
};
 
}  // namespace Experimental
 
}  // namespace Kokkos
 
//----------------------------------------------------------------------------
 
namespace Kokkos {
 
namespace Impl {
 
template <>
class SharedAllocationRecord<Kokkos::Experimental::HBWSpace, void>
    : public SharedAllocationRecord<void, void> {
 private:
  friend Kokkos::Experimental::HBWSpace;
 
  using RecordBase = SharedAllocationRecord<void, void>;
 
  SharedAllocationRecord(const SharedAllocationRecord&) = delete;
  SharedAllocationRecord& operator=(const SharedAllocationRecord&) = delete;
 
  static void deallocate(RecordBase*);
 
#ifdef KOKKOS_ENABLE_DEBUG
  static RecordBase s_root_record;
#endif
 
  const Kokkos::Experimental::HBWSpace m_space;
 
 protected:
  ~SharedAllocationRecord()
#if defined( \
    KOKKOS_IMPL_INTEL_WORKAROUND_NOEXCEPT_SPECIFICATION_VIRTUAL_FUNCTION)
      noexcept
#endif
      ;
  SharedAllocationRecord() = default;
 
  SharedAllocationRecord(
      const Kokkos::Experimental::HBWSpace& arg_space,
      const std::string& arg_label, const size_t arg_alloc_size,
      const RecordBase::function_type arg_dealloc = &deallocate);
 
 public:
  inline std::string get_label() const {
    return std::string(RecordBase::head()->m_label);
  }
 
  KOKKOS_INLINE_FUNCTION static SharedAllocationRecord* allocate(
      const Kokkos::Experimental::HBWSpace& arg_space,
      const std::string& arg_label, const size_t arg_alloc_size) {
#if defined(KOKKOS_ACTIVE_EXECUTION_MEMORY_SPACE_HOST)
    return new SharedAllocationRecord(arg_space, arg_label, arg_alloc_size);
#else
    return (SharedAllocationRecord*)0;
#endif
  }
 
  static void* allocate_tracked(const Kokkos::Experimental::HBWSpace& arg_space,
                                const std::string& arg_label,
                                const size_t arg_alloc_size);
 
  static void* reallocate_tracked(void* const arg_alloc_ptr,
                                  const size_t arg_alloc_size);
 
  static void deallocate_tracked(void* const arg_alloc_ptr);
 
  static SharedAllocationRecord* get_record(void* arg_alloc_ptr);
 
  static void print_records(std::ostream&,
                            const Kokkos::Experimental::HBWSpace&,
                            bool detail = false);
};
 
}  // namespace Impl
 
}  // namespace Kokkos
 
//----------------------------------------------------------------------------
 
namespace Kokkos {
 
namespace Impl {
 
static_assert(
    Kokkos::Impl::MemorySpaceAccess<Kokkos::Experimental::HBWSpace,
                                    Kokkos::Experimental::HBWSpace>::assignable,
    "");
 
template <>
struct MemorySpaceAccess<Kokkos::HostSpace, Kokkos::Experimental::HBWSpace> {
  enum : bool { assignable = true };
  enum : bool { accessible = true };
  enum : bool { deepcopy = true };
};
 
template <>
struct MemorySpaceAccess<Kokkos::Experimental::HBWSpace, Kokkos::HostSpace> {
  enum : bool { assignable = false };
  enum : bool { accessible = true };
  enum : bool { deepcopy = true };
};
 
}  // namespace Impl
 
}  // namespace Kokkos
 
//----------------------------------------------------------------------------
 
namespace Kokkos {
 
namespace Impl {
 
template <class ExecutionSpace>
struct DeepCopy<Kokkos::Experimental::HBWSpace, Kokkos::Experimental::HBWSpace,
                ExecutionSpace> {
  DeepCopy(void* dst, const void* src, size_t n) { memcpy(dst, src, n); }
 
  DeepCopy(const ExecutionSpace& exec, void* dst, const void* src, size_t n) {
    exec.fence();
    memcpy(dst, src, n);
  }
};
 
template <class ExecutionSpace>
struct DeepCopy<HostSpace, Kokkos::Experimental::HBWSpace, ExecutionSpace> {
  DeepCopy(void* dst, const void* src, size_t n) { memcpy(dst, src, n); }
 
  DeepCopy(const ExecutionSpace& exec, void* dst, const void* src, size_t n) {
    exec.fence();
    memcpy(dst, src, n);
  }
};
 
template <class ExecutionSpace>
struct DeepCopy<Kokkos::Experimental::HBWSpace, HostSpace, ExecutionSpace> {
  DeepCopy(void* dst, const void* src, size_t n) { memcpy(dst, src, n); }
 
  DeepCopy(const ExecutionSpace& exec, void* dst, const void* src, size_t n) {
    exec.fence();
    memcpy(dst, src, n);
  }
};
 
}  // namespace Impl
 
}  // namespace Kokkos
 
#endif
#endif  // #define KOKKOS_HBWSPACE_HPP