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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
// SPDX-FileCopyrightText: Copyright Contributors to the Kokkos project
#include <TestSYCL_Category.hpp>
#include <Kokkos_Macros.hpp>
#ifdef KOKKOS_ENABLE_EXPERIMENTAL_CXX20_MODULES
import kokkos.core;
#else
#include <Kokkos_Core.hpp>
#endif
#include <Kokkos_Graph.hpp>
#include <gtest/gtest.h>
#include <filesystem>
#include <fstream>
#include <regex>
namespace {
template <typename ViewType>
struct Increment {
ViewType data;
KOKKOS_FUNCTION
void operator()(const int) const { ++data(); }
};
TEST(TEST_CATEGORY, graph_get_native_return_types_are_references) {
using graph_t = Kokkos::Experimental::Graph<Kokkos::SYCL>;
static_assert(
std::is_reference_v<decltype(std::declval<graph_t>().native_graph())>);
static_assert(std::is_reference_v<
decltype(std::declval<graph_t>().native_graph_exec())>);
}
// This test checks the promises of Kokkos::Graph against its
// underlying SYCL native objects.
TEST(TEST_CATEGORY, graph_promises_on_native_objects) {
Kokkos::Experimental::Graph<Kokkos::SYCL> graph{};
// Before instantiation, the SYCL graph is valid, but the SYCL executable
// graph is still null. Since the SYCL command graph is a regular object,
// no check is needed.
// However, the executable SYCL command graph is stored as an optional,
// so let's check it is empty for now.
ASSERT_FALSE(graph.native_graph_exec().has_value());
// After instantiation, both native objects are valid.
graph.instantiate();
ASSERT_TRUE(graph.native_graph_exec().has_value());
}
// Use native SYCL graph to generate a DOT representation.
TEST(TEST_CATEGORY, graph_instantiate_and_debug_dot_print) {
using view_t = Kokkos::View<int, Kokkos::SYCL>;
const Kokkos::SYCL exec{};
view_t data(Kokkos::view_alloc(exec, "witness"));
Kokkos::Experimental::Graph graph{exec};
graph.root_node().then_parallel_for(1, Increment<view_t>{data});
graph.instantiate();
ASSERT_EQ(graph.native_graph().get_nodes().size(), 2u);
const auto dot = std::filesystem::temp_directory_path() / "sycl_graph.dot";
graph.native_graph().print_graph(dot, true);
ASSERT_TRUE(std::filesystem::exists(dot));
ASSERT_GT(std::filesystem::file_size(dot), 0u);
// We could write a check against the full kernel's function signature, but
// it would make the test rely too much on internal implementation details.
// Therefore, we just look for the functor and policy. Note that the
// signature is mangled in the 'dot' output.
const std::string expected("[A-Za-z0-9_]+Increment[A-Za-z0-9_]+RangePolicy");
std::stringstream buffer;
buffer << std::ifstream(dot).rdbuf();
ASSERT_TRUE(std::regex_search(buffer.str(), std::regex(expected)))
<< "Could not find expected signature regex " << std::quoted(expected)
<< " in " << dot;
}
// Build a Kokkos::Graph from an existing SYCL command graph.
TEST(TEST_CATEGORY, graph_construct_from_native) {
using graph_impl_t = Kokkos::Impl::GraphImpl<Kokkos::SYCL>;
using native_graph_t = typename graph_impl_t::native_graph_t;
using view_t = Kokkos::View<int, Kokkos::SYCLSharedUSMSpace>;
const Kokkos::SYCL exec{};
native_graph_t native_graph(exec.sycl_queue().get_context(),
exec.sycl_queue().get_device());
Kokkos::Experimental::Graph graph_from_native(exec, std::move(native_graph));
const view_t data(Kokkos::view_alloc(exec, "witness"));
graph_from_native.root_node().then_parallel_for(1, Increment<view_t>{data});
graph_from_native.submit(exec);
exec.fence();
ASSERT_EQ(data(), 1);
}
} // namespace
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