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Zoltan2_BasicKokkosIdentifierAdapter.hpp
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5// Zoltan2: A package of combinatorial algorithms for scientific computing
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45
50#ifndef _ZOLTAN2_BASICKOKKOSIDENTIFIERADAPTER_HPP_
51#define _ZOLTAN2_BASICKOKKOSIDENTIFIERADAPTER_HPP_
52
53#include <Kokkos_Core.hpp>
56
57using Kokkos::ALL;
58
59namespace Zoltan2 {
60
83template <typename User>
85
86public:
92 typedef typename node_t::device_type device_t;
93 typedef User user_t;
94
109 Kokkos::View<gno_t*, device_t> &ids,
110 Kokkos::View<scalar_t**, device_t> &weights);
111
113 // The Adapter interface.
115
116 size_t getLocalNumIDs() const override {
117 return idsView_.extent(0);
118 }
119
120 void getIDsView(const gno_t *&ids) const override {
121 auto kokkosIds = idsView_.view_host();
122 ids = kokkosIds.data();
123 }
124
125 void getIDsKokkosView(Kokkos::View<const gno_t *, device_t> &ids) const override {
126 ids = idsView_.view_device();
127 }
128
129 int getNumWeightsPerID() const override {
130 return weightsView_.extent(1);
131 }
132
133 void getWeightsView(const scalar_t *&wgt, int &stride,
134 int idx = 0) const override
135 {
136 auto h_wgts_2d = weightsView_.view_host();
137
138 wgt = Kokkos::subview(h_wgts_2d, Kokkos::ALL, idx).data();
139 stride = 1;
140 }
141
142 void getWeightsKokkosView(Kokkos::View<scalar_t **, device_t> &wgts) const override {
143 wgts = weightsView_.template view<device_t>();
144 }
145
146private:
147 Kokkos::DualView<gno_t *, device_t> idsView_;
148 Kokkos::DualView<scalar_t **, device_t> weightsView_;
149};
150
152// Definitions
154
155template <typename User>
157 Kokkos::View<gno_t *, device_t> &ids,
158 Kokkos::View<scalar_t **, device_t> &weights)
159{
160 idsView_ = Kokkos::DualView<gno_t *, device_t>("idsView_", ids.extent(0));
161 Kokkos::deep_copy(idsView_.h_view, ids);
162
163 weightsView_ = Kokkos::DualView<scalar_t **, device_t>("weightsView_",
164 weights.extent(0),
165 weights.extent(1));
166 Kokkos::deep_copy(weightsView_.h_view, weights);
167
168 weightsView_.modify_host();
169 weightsView_.sync_host();
170 weightsView_.template sync<device_t>();
171
172 idsView_.modify_host();
173 idsView_.sync_host();
174 idsView_.template sync<device_t>();
175}
176
177} //namespace Zoltan2
178
179#endif
Defines the IdentifierAdapter interface.
This file defines the StridedData class.
This class represents a collection of global Identifiers and their associated weights,...
void getWeightsKokkosView(Kokkos::View< scalar_t **, device_t > &wgts) const override
void getIDsView(const gno_t *&ids) const override
Provide a pointer to this process' identifiers.
BasicKokkosIdentifierAdapter(Kokkos::View< gno_t *, device_t > &ids, Kokkos::View< scalar_t **, device_t > &weights)
Constructor.
int getNumWeightsPerID() const override
Returns the number of weights per object. Number of weights per object should be zero or greater....
void getIDsKokkosView(Kokkos::View< const gno_t *, device_t > &ids) const override
void getWeightsView(const scalar_t *&wgt, int &stride, int idx=0) const override
size_t getLocalNumIDs() const override
Returns the number of objects on this process.
IdentifierAdapter defines the interface for identifiers.
Created by mbenlioglu on Aug 31, 2020.
static ArrayRCP< ArrayRCP< zscalar_t > > weights
default_gno_t gno_t
The ordinal type (e.g., int, long, int64_t) that can represent global counts and identifiers.
default_node_t node_t
The Kokkos node type. This is only meaningful for users of Tpetra objects.
default_lno_t lno_t
The ordinal type (e.g., int, long, int64_t) that represents local counts and local indices.
default_part_t part_t
The data type to represent part numbers.
default_scalar_t scalar_t
The data type for weights and coordinates.