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lammps/lib/kokkos/containers/src/Kokkos_SegmentedView.hpp
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Kokkos_SegmentedView.hpp
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/*
//@HEADER
// ************************************************************************
//
// Kokkos v. 2.0
// Copyright (2014) Sandia Corporation
//
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
// the U.S. Government retains certain rights in this software.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// 3. Neither the name of the Corporation nor the names of the
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Questions? Contact H. Carter Edwards (hcedwar@sandia.gov)
//
// ************************************************************************
//@HEADER
*/
#ifndef KOKKOS_SEGMENTED_VIEW_HPP_
#define KOKKOS_SEGMENTED_VIEW_HPP_
#include <Kokkos_Core.hpp>
#include <impl/Kokkos_Error.hpp>
#include <cstdio>
#if ! defined( KOKKOS_USING_EXPERIMENTAL_VIEW )
namespace Kokkos {
namespace Experimental {
namespace Impl {
template<class DataType, class Arg1Type, class Arg2Type, class Arg3Type>
struct delete_segmented_view;
template<class MemorySpace>
inline
void DeviceSetAllocatableMemorySize(size_t) {}
#if defined( KOKKOS_HAVE_CUDA )
template<>
inline
void DeviceSetAllocatableMemorySize<Kokkos::CudaSpace>(size_t size) {
#ifdef __CUDACC__
size_t size_limit;
cudaDeviceGetLimit(&size_limit,cudaLimitMallocHeapSize);
if(size_limit<size)
cudaDeviceSetLimit(cudaLimitMallocHeapSize,2*size);
cudaDeviceGetLimit(&size_limit,cudaLimitMallocHeapSize);
#endif
}
template<>
inline
void DeviceSetAllocatableMemorySize<Kokkos::CudaUVMSpace>(size_t size) {
#ifdef __CUDACC__
size_t size_limit;
cudaDeviceGetLimit(&size_limit,cudaLimitMallocHeapSize);
if(size_limit<size)
cudaDeviceSetLimit(cudaLimitMallocHeapSize,2*size);
cudaDeviceGetLimit(&size_limit,cudaLimitMallocHeapSize);
#endif
}
#endif /* #if defined( KOKKOS_HAVE_CUDA ) */
}
template< class DataType ,
class Arg1Type = void ,
class Arg2Type = void ,
class Arg3Type = void>
class SegmentedView : public Kokkos::ViewTraits< DataType , Arg1Type , Arg2Type, Arg3Type >
{
public:
//! \name Typedefs for device types and various Kokkos::View specializations.
//@{
typedef Kokkos::ViewTraits< DataType , Arg1Type , Arg2Type, Arg3Type > traits ;
//! The type of a Kokkos::View on the device.
typedef Kokkos::View< typename traits::data_type ,
typename traits::array_layout ,
typename traits::memory_space ,
Kokkos::MemoryUnmanaged > t_dev ;
private:
Kokkos::View<t_dev*,typename traits::memory_space> segments_;
Kokkos::View<int,typename traits::memory_space> realloc_lock;
Kokkos::View<int,typename traits::memory_space> nsegments_;
size_t segment_length_;
size_t segment_length_m1_;
int max_segments_;
int segment_length_log2;
// Dimensions, cardinality, capacity, and offset computation for
// multidimensional array view of contiguous memory.
// Inherits from Impl::Shape
typedef Kokkos::Impl::ViewOffset< typename traits::shape_type
, typename traits::array_layout
> offset_map_type ;
offset_map_type m_offset_map ;
typedef Kokkos::View< typename traits::array_intrinsic_type ,
typename traits::array_layout ,
typename traits::memory_space ,
typename traits::memory_traits > array_type ;
typedef Kokkos::View< typename traits::const_data_type ,
typename traits::array_layout ,
typename traits::memory_space ,
typename traits::memory_traits > const_type ;
typedef Kokkos::View< typename traits::non_const_data_type ,
typename traits::array_layout ,
typename traits::memory_space ,
typename traits::memory_traits > non_const_type ;
typedef Kokkos::View< typename traits::non_const_data_type ,
typename traits::array_layout ,
HostSpace ,
void > HostMirror ;
template< bool Accessible >
KOKKOS_INLINE_FUNCTION
typename Kokkos::Impl::enable_if< Accessible , typename traits::size_type >::type
dimension_0_intern() const { return nsegments_() * segment_length_ ; }
template< bool Accessible >
KOKKOS_INLINE_FUNCTION
typename Kokkos::Impl::enable_if< ! Accessible , typename traits::size_type >::type
dimension_0_intern() const
{
// In Host space
int n = 0 ;
#if ! defined( __CUDA_ARCH__ )
Kokkos::Impl::DeepCopy< HostSpace , typename traits::memory_space >( & n , nsegments_.ptr_on_device() , sizeof(int) );
#endif
return n * segment_length_ ;
}
public:
enum { Rank = traits::rank };
KOKKOS_INLINE_FUNCTION offset_map_type shape() const { return m_offset_map ; }
/* \brief return (current) size of dimension 0 */
KOKKOS_INLINE_FUNCTION typename traits::size_type dimension_0() const {
enum { Accessible = Kokkos::Impl::VerifyExecutionCanAccessMemorySpace<
Kokkos::Impl::ActiveExecutionMemorySpace, typename traits::memory_space >::value };
int n = SegmentedView::dimension_0_intern< Accessible >();
return n ;
}
/* \brief return size of dimension 1 */
KOKKOS_INLINE_FUNCTION typename traits::size_type dimension_1() const { return m_offset_map.N1 ; }
/* \brief return size of dimension 2 */
KOKKOS_INLINE_FUNCTION typename traits::size_type dimension_2() const { return m_offset_map.N2 ; }
/* \brief return size of dimension 3 */
KOKKOS_INLINE_FUNCTION typename traits::size_type dimension_3() const { return m_offset_map.N3 ; }
/* \brief return size of dimension 4 */
KOKKOS_INLINE_FUNCTION typename traits::size_type dimension_4() const { return m_offset_map.N4 ; }
/* \brief return size of dimension 5 */
KOKKOS_INLINE_FUNCTION typename traits::size_type dimension_5() const { return m_offset_map.N5 ; }
/* \brief return size of dimension 6 */
KOKKOS_INLINE_FUNCTION typename traits::size_type dimension_6() const { return m_offset_map.N6 ; }
/* \brief return size of dimension 7 */
KOKKOS_INLINE_FUNCTION typename traits::size_type dimension_7() const { return m_offset_map.N7 ; }
/* \brief return size of dimension 2 */
KOKKOS_INLINE_FUNCTION typename traits::size_type size() const {
return dimension_0() *
m_offset_map.N1 * m_offset_map.N2 * m_offset_map.N3 * m_offset_map.N4 *
m_offset_map.N5 * m_offset_map.N6 * m_offset_map.N7 ;
}
template< typename iType >
KOKKOS_INLINE_FUNCTION
typename traits::size_type dimension( const iType & i ) const {
if(i==0)
return dimension_0();
else
return Kokkos::Impl::dimension( m_offset_map , i );
}
KOKKOS_INLINE_FUNCTION
typename traits::size_type capacity() {
return segments_.dimension_0() *
m_offset_map.N1 * m_offset_map.N2 * m_offset_map.N3 * m_offset_map.N4 *
m_offset_map.N5 * m_offset_map.N6 * m_offset_map.N7;
}
KOKKOS_INLINE_FUNCTION
typename traits::size_type get_num_segments() {
enum { Accessible = Kokkos::Impl::VerifyExecutionCanAccessMemorySpace<
Kokkos::Impl::ActiveExecutionMemorySpace, typename traits::memory_space >::value };
int n = SegmentedView::dimension_0_intern< Accessible >();
return n/segment_length_ ;
}
KOKKOS_INLINE_FUNCTION
typename traits::size_type get_max_segments() {
return max_segments_;
}
/// \brief Constructor that allocates View objects with an initial length of 0.
///
/// This constructor works mostly like the analogous constructor of View.
/// The first argument is a string label, which is entirely for your
/// benefit. (Different SegmentedView objects may have the same label if
/// you like.) The second argument 'view_length' is the size of the segments.
/// This number must be a power of two. The third argument n0 is the maximum
/// value for the first dimension of the segmented view. The maximal allocatable
/// number of Segments is thus: (n0+view_length-1)/view_length.
/// The arguments that follow are the other dimensions of the (1-7) of the
/// View objects. For example, for a View with 3 runtime dimensions,
/// the first 4 integer arguments will be nonzero:
/// SegmentedView("Name",32768,10000000,8,4). This allocates a SegmentedView
/// with a maximum of 306 segments of dimension (32768,8,4). The logical size of
/// the segmented view is (n,8,4) with n between 0 and 10000000.
/// You may omit the integer arguments that follow.
template< class LabelType >
SegmentedView(const LabelType & label ,
const size_t view_length ,
const size_t n0 ,
const size_t n1 = 0 ,
const size_t n2 = 0 ,
const size_t n3 = 0 ,
const size_t n4 = 0 ,
const size_t n5 = 0 ,
const size_t n6 = 0 ,
const size_t n7 = 0
): segment_length_(view_length),segment_length_m1_(view_length-1)
{
segment_length_log2 = -1;
size_t l = segment_length_;
while(l>0) {
l>>=1;
segment_length_log2++;
}
l = 1<<segment_length_log2;
if(l!=segment_length_)
Kokkos::Impl::throw_runtime_exception("Kokkos::SegmentedView requires a 'power of 2' segment length");
max_segments_ = (n0+segment_length_m1_)/segment_length_;
Impl::DeviceSetAllocatableMemorySize<typename traits::memory_space>(segment_length_*max_segments_*sizeof(typename traits::value_type));
segments_ = Kokkos::View<t_dev*,typename traits::execution_space>(label , max_segments_);
realloc_lock = Kokkos::View<int,typename traits::execution_space>("Lock");
nsegments_ = Kokkos::View<int,typename traits::execution_space>("nviews");
m_offset_map.assign( n0, n1, n2, n3, n4, n5, n6, n7, n0*n1*n2*n3*n4*n5*n6*n7 );
}
KOKKOS_INLINE_FUNCTION
SegmentedView(const SegmentedView& src):
segments_(src.segments_),
realloc_lock (src.realloc_lock),
nsegments_ (src.nsegments_),
segment_length_(src.segment_length_),
segment_length_m1_(src.segment_length_m1_),
max_segments_ (src.max_segments_),
segment_length_log2(src.segment_length_log2),
m_offset_map (src.m_offset_map)
{}
KOKKOS_INLINE_FUNCTION
SegmentedView& operator= (const SegmentedView& src) {
segments_ = src.segments_;
realloc_lock = src.realloc_lock;
nsegments_ = src.nsegments_;
segment_length_= src.segment_length_;
segment_length_m1_= src.segment_length_m1_;
max_segments_ = src.max_segments_;
segment_length_log2= src.segment_length_log2;
m_offset_map = src.m_offset_map;
return *this;
}
~SegmentedView() {
if ( !segments_.tracker().ref_counting()) { return; }
size_t ref_count = segments_.tracker().ref_count();
if(ref_count == 1u) {
Kokkos::fence();
typename Kokkos::View<int,typename traits::execution_space>::HostMirror h_nviews("h_nviews");
Kokkos::deep_copy(h_nviews,nsegments_);
Kokkos::parallel_for(h_nviews(),Impl::delete_segmented_view<DataType , Arg1Type , Arg2Type, Arg3Type>(*this));
}
}
KOKKOS_INLINE_FUNCTION
t_dev get_segment(const int& i) const {
return segments_[i];
}
template< class MemberType>
KOKKOS_INLINE_FUNCTION
void grow (MemberType& team_member, const size_t& growSize) const {
if (growSize>max_segments_*segment_length_) {
printf ("Exceeding maxSize: %lu %lu\n", growSize, max_segments_*segment_length_);
return;
}
if(team_member.team_rank()==0) {
bool too_small = growSize > segment_length_ * nsegments_();
if (too_small) {
while(Kokkos::atomic_compare_exchange(&realloc_lock(),0,1) )
; // get the lock
too_small = growSize > segment_length_ * nsegments_(); // Recheck once we have the lock
if(too_small) {
while(too_small) {
const size_t alloc_size = segment_length_*m_offset_map.N1*m_offset_map.N2*m_offset_map.N3*
m_offset_map.N4*m_offset_map.N5*m_offset_map.N6*m_offset_map.N7;
typename traits::non_const_value_type* const ptr = new typename traits::non_const_value_type[alloc_size];
segments_(nsegments_()) =
t_dev(ptr,segment_length_,m_offset_map.N1,m_offset_map.N2,m_offset_map.N3,m_offset_map.N4,m_offset_map.N5,m_offset_map.N6,m_offset_map.N7);
nsegments_()++;
too_small = growSize > segment_length_ * nsegments_();
}
}
realloc_lock() = 0; //release the lock
}
}
team_member.team_barrier();
}
KOKKOS_INLINE_FUNCTION
void grow_non_thread_safe (const size_t& growSize) const {
if (growSize>max_segments_*segment_length_) {
printf ("Exceeding maxSize: %lu %lu\n", growSize, max_segments_*segment_length_);
return;
}
bool too_small = growSize > segment_length_ * nsegments_();
if(too_small) {
while(too_small) {
const size_t alloc_size = segment_length_*m_offset_map.N1*m_offset_map.N2*m_offset_map.N3*
m_offset_map.N4*m_offset_map.N5*m_offset_map.N6*m_offset_map.N7;
typename traits::non_const_value_type* const ptr =
new typename traits::non_const_value_type[alloc_size];
segments_(nsegments_()) =
t_dev (ptr, segment_length_, m_offset_map.N1, m_offset_map.N2,
m_offset_map.N3, m_offset_map.N4, m_offset_map.N5,
m_offset_map.N6, m_offset_map.N7);
nsegments_()++;
too_small = growSize > segment_length_ * nsegments_();
}
}
}
template< typename iType0 >
KOKKOS_FORCEINLINE_FUNCTION
typename std::enable_if<( std::is_integral<iType0>::value && traits::rank == 1 )
, typename traits::value_type &
>::type
operator() ( const iType0 & i0 ) const
{
return segments_[i0>>segment_length_log2](i0&(segment_length_m1_));
}
template< typename iType0 , typename iType1 >
KOKKOS_FORCEINLINE_FUNCTION
typename std::enable_if<( std::is_integral<iType0>::value &&
std::is_integral<iType1>::value &&
traits::rank == 2 )
, typename traits::value_type &
>::type
operator() ( const iType0 & i0 , const iType1 & i1 ) const
{
return segments_[i0>>segment_length_log2](i0&(segment_length_m1_),i1);
}
template< typename iType0 , typename iType1 , typename iType2 >
KOKKOS_FORCEINLINE_FUNCTION
typename std::enable_if<( std::is_integral<iType0>::value &&
std::is_integral<iType1>::value &&
std::is_integral<iType2>::value &&
traits::rank == 3 )
, typename traits::value_type &
>::type
operator() ( const iType0 & i0 , const iType1 & i1 , const iType2 & i2 ) const
{
return segments_[i0>>segment_length_log2](i0&(segment_length_m1_),i1,i2);
}
template< typename iType0 , typename iType1 , typename iType2 , typename iType3 >
KOKKOS_FORCEINLINE_FUNCTION
typename std::enable_if<( std::is_integral<iType0>::value &&
std::is_integral<iType1>::value &&
std::is_integral<iType2>::value &&
std::is_integral<iType3>::value &&
traits::rank == 4 )
, typename traits::value_type &
>::type
operator() ( const iType0 & i0 , const iType1 & i1 , const iType2 & i2 , const iType3 & i3 ) const
{
return segments_[i0>>segment_length_log2](i0&(segment_length_m1_),i1,i2,i3);
}
template< typename iType0 , typename iType1 , typename iType2 , typename iType3 ,
typename iType4 >
KOKKOS_FORCEINLINE_FUNCTION
typename std::enable_if<( std::is_integral<iType0>::value &&
std::is_integral<iType1>::value &&
std::is_integral<iType2>::value &&
std::is_integral<iType3>::value &&
std::is_integral<iType4>::value &&
traits::rank == 5 )
, typename traits::value_type &
>::type
operator() ( const iType0 & i0 , const iType1 & i1 , const iType2 & i2 , const iType3 & i3 ,
const iType4 & i4 ) const
{
return segments_[i0>>segment_length_log2](i0&(segment_length_m1_),i1,i2,i3,i4);
}
template< typename iType0 , typename iType1 , typename iType2 , typename iType3 ,
typename iType4 , typename iType5 >
KOKKOS_FORCEINLINE_FUNCTION
typename std::enable_if<( std::is_integral<iType0>::value &&
std::is_integral<iType1>::value &&
std::is_integral<iType2>::value &&
std::is_integral<iType3>::value &&
std::is_integral<iType4>::value &&
std::is_integral<iType5>::value &&
traits::rank == 6 )
, typename traits::value_type &
>::type
operator() ( const iType0 & i0 , const iType1 & i1 , const iType2 & i2 , const iType3 & i3 ,
const iType4 & i4 , const iType5 & i5 ) const
{
return segments_[i0>>segment_length_log2](i0&(segment_length_m1_),i1,i2,i3,i4,i5);
}
template< typename iType0 , typename iType1 , typename iType2 , typename iType3 ,
typename iType4 , typename iType5 , typename iType6 >
KOKKOS_FORCEINLINE_FUNCTION
typename std::enable_if<( std::is_integral<iType0>::value &&
std::is_integral<iType1>::value &&
std::is_integral<iType2>::value &&
std::is_integral<iType3>::value &&
std::is_integral<iType4>::value &&
std::is_integral<iType5>::value &&
std::is_integral<iType6>::value &&
traits::rank == 7 )
, typename traits::value_type &
>::type
operator() ( const iType0 & i0 , const iType1 & i1 , const iType2 & i2 , const iType3 & i3 ,
const iType4 & i4 , const iType5 & i5 , const iType6 & i6 ) const
{
return segments_[i0>>segment_length_log2](i0&(segment_length_m1_),i1,i2,i3,i4,i5,i6);
}
template< typename iType0 , typename iType1 , typename iType2 , typename iType3 ,
typename iType4 , typename iType5 , typename iType6 , typename iType7 >
KOKKOS_FORCEINLINE_FUNCTION
typename std::enable_if<( std::is_integral<iType0>::value &&
std::is_integral<iType1>::value &&
std::is_integral<iType2>::value &&
std::is_integral<iType3>::value &&
std::is_integral<iType4>::value &&
std::is_integral<iType5>::value &&
std::is_integral<iType6>::value &&
std::is_integral<iType7>::value &&
traits::rank == 8 )
, typename traits::value_type &
>::type
operator() ( const iType0 & i0 , const iType1 & i1 , const iType2 & i2 , const iType3 & i3 ,
const iType4 & i4 , const iType5 & i5 , const iType6 & i6 , const iType7 & i7 ) const
{
return segments_[i0>>segment_length_log2](i0&(segment_length_m1_),i1,i2,i3,i4,i5,i6,i7);
}
};
namespace Impl {
template<class DataType, class Arg1Type, class Arg2Type, class Arg3Type>
struct delete_segmented_view {
typedef SegmentedView<DataType , Arg1Type , Arg2Type, Arg3Type> view_type;
typedef typename view_type::execution_space execution_space;
view_type view_;
delete_segmented_view(view_type view):view_(view) {
}
KOKKOS_INLINE_FUNCTION
void operator() (int i) const {
delete [] view_.get_segment(i).ptr_on_device();
}
};
}
}
}
#endif
#endif
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