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TestViewCopy_c.hpp
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TestViewCopy_c.hpp
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//@HEADER
// ************************************************************************
//
// Kokkos v. 4.0
// Copyright (2022) National Technology & Engineering
// Solutions of Sandia, LLC (NTESS).
//
// Under the terms of Contract DE-NA0003525 with NTESS,
// the U.S. Government retains certain rights in this software.
//
// Part of Kokkos, under the Apache License v2.0 with LLVM Exceptions.
// See https://kokkos.org/LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//@HEADER
#include <gtest/gtest.h>
#include <Kokkos_Core.hpp>
namespace {
// Do not rely on deep_copy(0) as we want to test it!
template <class ViewType, class ExecSpace>
void reset_view(const ExecSpace& space, ViewType& a, int magic) {
auto policy = Kokkos::RangePolicy<ExecSpace>(space, 0, a.span());
assert(a.span_is_contiguous());
Kokkos::parallel_for(
"TestViewCopy::ResetView", policy,
KOKKOS_LAMBDA(int i) { a.data()[i] = magic; });
}
template <class ViewType, class ExecSpace>
size_t compute_overall_sum(const ExecSpace& space, ViewType& a) {
auto policy = Kokkos::RangePolicy<ExecSpace>(space, 0, a.span());
assert(a.span_is_contiguous());
typename ViewType::value_type sum = 0;
Kokkos::parallel_reduce(
"TestViewCopy::ComputeSum", policy,
KOKKOS_LAMBDA(int i, int& lcl_sum) { lcl_sum += a.data()[i]; }, sum);
return static_cast<size_t>(sum);
}
template <typename ExecSpace, typename DT, typename... DP>
bool check_magic_value(
const ExecSpace& space, const Kokkos::View<DT, DP...>& a, int magic,
std::enable_if_t<Kokkos::ViewTraits<DT, DP...>::rank == 0>* = nullptr) {
auto policy = Kokkos::RangePolicy<ExecSpace>(space, 0, 1);
bool all_elements_are_set; // Uninitialized, set by parallel_reduce
Kokkos::parallel_reduce(
"TestViewCopy::CheckMagicValueRank0", policy,
KOKKOS_LAMBDA(int, bool& local_check) { local_check &= (a() == magic); },
Kokkos::LAnd<bool>(all_elements_are_set));
return all_elements_are_set;
}
template <typename ExecSpace, typename DT, typename... DP>
bool check_magic_value(
const ExecSpace& space, const Kokkos::View<DT, DP...>& a, int magic,
std::enable_if_t<Kokkos::ViewTraits<DT, DP...>::rank == 1>* = nullptr) {
auto policy = Kokkos::RangePolicy<ExecSpace>(space, 0, a.extent(0));
bool all_elements_are_set; // Uninitialized, set by parallel_reduce
Kokkos::parallel_reduce(
"TestViewCopy::CheckMagicValueRank1", policy,
KOKKOS_LAMBDA(int i, bool& local_check) {
local_check &= (a(i) == magic);
},
Kokkos::LAnd<bool>(all_elements_are_set));
return all_elements_are_set;
}
template <typename ExecSpace, typename DT, typename... DP>
bool check_magic_value(
const ExecSpace& space, const Kokkos::View<DT, DP...>& a, int magic,
std::enable_if_t<Kokkos::ViewTraits<DT, DP...>::rank == 2>* = nullptr) {
auto policy = Kokkos::MDRangePolicy<Kokkos::Rank<2>, ExecSpace>(
space, {0, 0}, {a.extent(0), a.extent(1)});
bool all_elements_are_set; // Uninitialized, set by parallel_reduce
Kokkos::parallel_reduce(
"TestViewCopy::CheckMagicValueRank2", policy,
KOKKOS_LAMBDA(int i0, int i1, bool& local_check) {
local_check &= (a(i0, i1) == magic);
},
Kokkos::LAnd<bool>(all_elements_are_set));
return all_elements_are_set;
}
template <typename ExecSpace, typename DT, typename... DP>
bool check_magic_value(
const ExecSpace& space, const Kokkos::View<DT, DP...>& a, int magic,
std::enable_if_t<Kokkos::ViewTraits<DT, DP...>::rank == 3>* = nullptr) {
auto policy = Kokkos::MDRangePolicy<Kokkos::Rank<3>, ExecSpace>(
space, {0, 0, 0}, {a.extent(0), a.extent(1), a.extent(2)});
bool all_elements_are_set; // Uninitialized, set by parallel_reduce
Kokkos::parallel_reduce(
"TestViewCopy::CheckMagicValueRank3", policy,
KOKKOS_LAMBDA(int i0, int i1, int i2, bool& local_check) {
local_check &= (a(i0, i1, i2) == magic);
},
Kokkos::LAnd<bool>(all_elements_are_set));
return all_elements_are_set;
}
template <typename ExecSpace, typename DT, typename... DP>
bool check_magic_value(
const ExecSpace& space, const Kokkos::View<DT, DP...>& a, int magic,
std::enable_if_t<Kokkos::ViewTraits<DT, DP...>::rank == 4>* = nullptr) {
auto policy = Kokkos::MDRangePolicy<Kokkos::Rank<4>, ExecSpace>(
space, {0, 0, 0, 0},
{a.extent(0), a.extent(1), a.extent(2), a.extent(3)});
bool all_elements_are_set; // Uninitialized, set by parallel_reduce
Kokkos::parallel_reduce(
"TestViewCopy::CheckMagicValueRank4", policy,
KOKKOS_LAMBDA(int i0, int i1, int i2, int i3, bool& local_check) {
local_check &= (a(i0, i1, i2, i3) == magic);
},
Kokkos::LAnd<bool>(all_elements_are_set));
return all_elements_are_set;
}
template <typename ExecSpace, typename DT, typename... DP>
bool check_magic_value(
const ExecSpace& space, const Kokkos::View<DT, DP...>& a, int magic,
std::enable_if_t<Kokkos::ViewTraits<DT, DP...>::rank == 5>* = nullptr) {
auto policy = Kokkos::MDRangePolicy<Kokkos::Rank<5>, ExecSpace>(
space, {0, 0, 0, 0, 0},
{a.extent(0), a.extent(1), a.extent(2), a.extent(3), a.extent(4)});
bool all_elements_are_set; // Uninitialized, set by parallel_reduce
Kokkos::parallel_reduce(
"TestViewCopy::CheckMagicValueRank5", policy,
KOKKOS_LAMBDA(int i0, int i1, int i2, int i3, int i4, bool& local_check) {
local_check &= (a(i0, i1, i2, i3, i4) == magic);
},
Kokkos::LAnd<bool>(all_elements_are_set));
return all_elements_are_set;
}
template <typename ExecSpace, typename DT, typename... DP>
bool check_magic_value(
const ExecSpace& space, const Kokkos::View<DT, DP...>& a, int magic,
std::enable_if_t<Kokkos::ViewTraits<DT, DP...>::rank == 6>* = nullptr) {
auto policy = Kokkos::MDRangePolicy<Kokkos::Rank<6>, ExecSpace>(
space, {0, 0, 0, 0, 0, 0},
{a.extent(0), a.extent(1), a.extent(2), a.extent(3), a.extent(4),
a.extent(5)});
bool all_elements_are_set; // Uninitialized, set by parallel_reduce
Kokkos::parallel_reduce(
"TestViewCopy::CheckMagicValueRank6", policy,
KOKKOS_LAMBDA(int i0, int i1, int i2, int i3, int i4, int i5,
bool& local_check) {
local_check &= (a(i0, i1, i2, i3, i4, i5) == magic);
},
Kokkos::LAnd<bool>(all_elements_are_set));
return all_elements_are_set;
}
template <typename ExecSpace, typename DT, typename... DP>
bool check_magic_value(
const ExecSpace& space, const Kokkos::View<DT, DP...>& a, int magic,
std::enable_if_t<Kokkos::ViewTraits<DT, DP...>::rank == 7>* = nullptr) {
auto policy = Kokkos::MDRangePolicy<Kokkos::Rank<6>, ExecSpace>(
space, {0, 0, 0, 0, 0, 0},
{a.extent(0), a.extent(1), a.extent(2), a.extent(3), a.extent(4),
a.extent(5)});
bool all_elements_are_set = true;
for (size_t outer = 0; outer < a.extent(6); ++outer) {
bool all_local_elements_are_set; // Uninitialized, set by parallel_reduce
Kokkos::parallel_reduce(
"TestViewCopy::CheckMagicValueRank7", policy,
KOKKOS_LAMBDA(int i0, int i1, int i2, int i3, int i4, int i5,
bool& local_check) {
local_check &= (a(i0, i1, i2, i3, i4, i5, outer) == magic);
},
Kokkos::LAnd<bool>(all_local_elements_are_set));
all_elements_are_set = all_elements_are_set && all_local_elements_are_set;
}
return all_elements_are_set;
}
template <typename ExecSpace, typename DT, typename... DP>
bool check_magic_value(
const ExecSpace& space, const Kokkos::View<DT, DP...>& a, int magic,
std::enable_if_t<Kokkos::ViewTraits<DT, DP...>::rank == 8>* = nullptr) {
auto policy = Kokkos::MDRangePolicy<Kokkos::Rank<6>, ExecSpace>(
space, {0, 0, 0, 0, 0, 0},
{a.extent(0), a.extent(1), a.extent(2), a.extent(3), a.extent(4),
a.extent(5)});
bool all_elements_are_set = true;
for (size_t outer = 0; outer < a.extent(7); ++outer) {
for (size_t inner = 0; inner < a.extent(6); ++inner) {
bool all_local_elements_are_set; // Uninitialized, set by parallel_reduce
Kokkos::parallel_reduce(
"TestViewCopy::CheckMagicValueRank8", policy,
KOKKOS_LAMBDA(int i0, int i1, int i2, int i3, int i4, int i5,
bool& local_check) {
local_check &= (a(i0, i1, i2, i3, i4, i5, inner, outer) == magic);
},
Kokkos::LAnd<bool>(all_local_elements_are_set));
all_elements_are_set = all_elements_are_set && all_local_elements_are_set;
}
}
return all_elements_are_set;
}
template <class ExecSpace, class ViewType>
bool view_fill_test(const ExecSpace& space, ViewType& a, int magic) {
Kokkos::deep_copy(space, a, magic);
#if defined(KOKKOS_ENABLE_OPENMPTARGET)
// FIXME_OPENMPTARGET Does not work with Land reducer
return true;
#else // KOKKOS_ENABLE_OPENMPTARGET
return check_magic_value(space, a, magic);
#endif // KOKKOS_ENABLE_OPENMPTARGET
}
template <class Layout, class Space>
void run_test() {
int magic = 19;
using ViewType = Kokkos::View<int********, Layout, Space>;
// Create views with different lengths for each dimension
// We want to test if all loops are over the correct dimensions
// We use prime numbers to make sure that the strides are different
ViewType a_decreasing("a", 23, 19, 17, 13, 11, 7, 5, 3);
// We also test with increasing strides to catch more "out-of-bounds" errors
// within subviews.
ViewType a_increasing("a", 3, 5, 7, 11, 13, 17, 19, 23);
using exec_space = typename Space::execution_space;
auto space = exec_space();
// Use subviews in the tests to have cases with different ranks and
// non-contiguous memory
// Tests have two parts:
// 1. Fill the subview with a magic value and check that all elements are set
// 2. Check if only the subview is set by summing all elements in the view and
// comparing to the subview size times the magic value
// Rank 0
{
auto sub_dec = Kokkos::subview(a_decreasing, 0, 0, 0, 0, 0, 0, 0, 0);
EXPECT_TRUE(view_fill_test(space, sub_dec, magic));
EXPECT_EQ(compute_overall_sum(space, a_decreasing),
static_cast<size_t>(magic));
auto sub_inc = Kokkos::subview(a_increasing, 0, 0, 0, 0, 0, 0, 0, 0);
EXPECT_TRUE(view_fill_test(space, sub_inc, magic));
EXPECT_EQ(compute_overall_sum(space, a_increasing),
static_cast<size_t>(magic));
}
reset_view(space, a_decreasing, 0);
reset_view(space, a_increasing, 0);
// Rank 1
{
auto sub_dec =
Kokkos::subview(a_decreasing, Kokkos::ALL, 0, 0, 0, 0, 0, 0, 0);
EXPECT_TRUE(view_fill_test(space, sub_dec, magic));
EXPECT_EQ(compute_overall_sum(space, a_decreasing), sub_dec.size() * magic);
auto sub_inc =
Kokkos::subview(a_increasing, Kokkos::ALL, 0, 0, 0, 0, 0, 0, 0);
EXPECT_TRUE(view_fill_test(space, sub_inc, magic));
EXPECT_EQ(compute_overall_sum(space, a_increasing), sub_inc.size() * magic);
}
reset_view(space, a_decreasing, 0);
reset_view(space, a_increasing, 0);
// Rank 2
{
auto sub_dec = Kokkos::subview(a_decreasing, Kokkos::ALL, Kokkos::ALL, 0, 0,
0, 0, 0, 0);
EXPECT_TRUE(view_fill_test(space, sub_dec, magic));
EXPECT_EQ(compute_overall_sum(space, a_decreasing), sub_dec.size() * magic);
auto sub_inc = Kokkos::subview(a_increasing, Kokkos::ALL, Kokkos::ALL, 0, 0,
0, 0, 0, 0);
EXPECT_TRUE(view_fill_test(space, sub_inc, magic));
EXPECT_EQ(compute_overall_sum(space, a_increasing), sub_inc.size() * magic);
}
reset_view(space, a_decreasing, 0);
reset_view(space, a_increasing, 0);
space.fence();
// Rank 3
{
auto sub_dec = Kokkos::subview(a_decreasing, Kokkos::ALL, Kokkos::ALL,
Kokkos::ALL, 0, 0, 0, 0, 0);
EXPECT_TRUE(view_fill_test(space, sub_dec, magic));
EXPECT_EQ(
compute_overall_sum(space, a_decreasing),
sub_dec.extent(0) * sub_dec.extent(1) * sub_dec.extent(2) * magic);
auto sub_inc = Kokkos::subview(a_increasing, Kokkos::ALL, Kokkos::ALL,
Kokkos::ALL, 0, 0, 0, 0, 0);
EXPECT_TRUE(view_fill_test(space, sub_inc, magic));
EXPECT_EQ(compute_overall_sum(space, a_increasing), sub_inc.size() * magic);
}
reset_view(space, a_decreasing, 0);
reset_view(space, a_increasing, 0);
space.fence();
// Rank 4
{
auto sub_dec = Kokkos::subview(a_decreasing, Kokkos::ALL, Kokkos::ALL,
Kokkos::ALL, Kokkos::ALL, 0, 0, 0, 0);
EXPECT_TRUE(view_fill_test(space, sub_dec, magic));
EXPECT_EQ(compute_overall_sum(space, a_decreasing),
sub_dec.extent(0) * sub_dec.extent(1) * sub_dec.extent(2) *
sub_dec.extent(3) * magic);
auto sub_inc = Kokkos::subview(a_increasing, Kokkos::ALL, Kokkos::ALL,
Kokkos::ALL, Kokkos::ALL, 0, 0, 0, 0);
EXPECT_TRUE(view_fill_test(space, sub_inc, magic));
EXPECT_EQ(compute_overall_sum(space, a_increasing), sub_inc.size() * magic);
}
reset_view(space, a_decreasing, 0);
reset_view(space, a_increasing, 0);
space.fence();
// Rank 5
{
auto sub_dec =
Kokkos::subview(a_decreasing, Kokkos::ALL, Kokkos::ALL, Kokkos::ALL,
Kokkos::ALL, Kokkos::ALL, 0, 0, 0);
EXPECT_TRUE(view_fill_test(space, sub_dec, magic));
EXPECT_EQ(compute_overall_sum(space, a_decreasing), sub_dec.size() * magic);
auto sub_inc =
Kokkos::subview(a_increasing, Kokkos::ALL, Kokkos::ALL, Kokkos::ALL,
Kokkos::ALL, Kokkos::ALL, 0, 0, 0);
EXPECT_TRUE(view_fill_test(space, sub_inc, magic));
EXPECT_EQ(compute_overall_sum(space, a_increasing), sub_inc.size() * magic);
}
reset_view(space, a_decreasing, 0);
reset_view(space, a_increasing, 0);
space.fence();
// Rank 6
{
auto sub_dec =
Kokkos::subview(a_decreasing, Kokkos::ALL, Kokkos::ALL, Kokkos::ALL,
Kokkos::ALL, Kokkos::ALL, Kokkos::ALL, 0, 0);
EXPECT_TRUE(view_fill_test(space, sub_dec, magic));
EXPECT_EQ(compute_overall_sum(space, a_decreasing), sub_dec.size() * magic);
auto sub_inc =
Kokkos::subview(a_increasing, Kokkos::ALL, Kokkos::ALL, Kokkos::ALL,
Kokkos::ALL, Kokkos::ALL, Kokkos::ALL, 0, 0);
EXPECT_TRUE(view_fill_test(space, sub_inc, magic));
EXPECT_EQ(compute_overall_sum(space, a_increasing), sub_inc.size() * magic);
}
reset_view(space, a_decreasing, 0);
reset_view(space, a_increasing, 0);
space.fence();
// Rank 7
{
auto sub_dec =
Kokkos::subview(a_decreasing, Kokkos::ALL, Kokkos::ALL, Kokkos::ALL,
Kokkos::ALL, Kokkos::ALL, Kokkos::ALL, Kokkos::ALL, 0);
EXPECT_TRUE(view_fill_test(space, sub_dec, magic));
EXPECT_EQ(compute_overall_sum(space, a_decreasing), sub_dec.size() * magic);
auto sub_inc =
Kokkos::subview(a_increasing, Kokkos::ALL, Kokkos::ALL, Kokkos::ALL,
Kokkos::ALL, Kokkos::ALL, Kokkos::ALL, Kokkos::ALL, 0);
EXPECT_TRUE(view_fill_test(space, sub_inc, magic));
EXPECT_EQ(compute_overall_sum(space, a_increasing), sub_inc.size() * magic);
}
reset_view(space, a_decreasing, 0);
reset_view(space, a_increasing, 0);
space.fence();
// Rank 8
{
auto sub_dec = Kokkos::subview(
a_decreasing, Kokkos::ALL, Kokkos::ALL, Kokkos::ALL, Kokkos::ALL,
Kokkos::ALL, Kokkos::ALL, Kokkos::ALL, std::make_pair(0, 2));
EXPECT_TRUE(view_fill_test(space, sub_dec, magic));
EXPECT_EQ(compute_overall_sum(space, a_decreasing), sub_dec.size() * magic);
auto sub_inc = Kokkos::subview(
a_increasing, Kokkos::ALL, Kokkos::ALL, Kokkos::ALL, Kokkos::ALL,
Kokkos::ALL, Kokkos::ALL, Kokkos::ALL, std::make_pair(0, 2));
EXPECT_TRUE(view_fill_test(space, sub_inc, magic));
EXPECT_EQ(compute_overall_sum(space, a_increasing), sub_inc.size() * magic);
}
}
TEST(TEST_CATEGORY, view_fill_tests_layout_right) {
using Space = TEST_EXECSPACE;
using Layout = Kokkos::LayoutRight;
run_test<Layout, Space>();
}
TEST(TEST_CATEGORY, view_fill_tests_layout_left) {
using Space = TEST_EXECSPACE;
using Layout = Kokkos::LayoutLeft;
run_test<Layout, Space>();
}
} // namespace