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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
// SPDX-FileCopyrightText: Copyright Contributors to the Kokkos project
#include <filesystem>
#include <fstream>
#include <regex>
#include <TestHIP_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>
namespace {
template <typename ViewType>
struct Increment {
ViewType data;
KOKKOS_FUNCTION
void operator()(const int) const { ++data(); }
};
// This test checks the promises of Kokkos::Graph against its
// underlying HIP native objects.
TEST(TEST_CATEGORY, graph_promises_on_native_objects) {
Kokkos::Experimental::Graph<Kokkos::HIP> graph{};
// Before instantiation, the HIP graph is valid, but the HIP executable
// graph is still null.
hipGraph_t hip_graph = graph.native_graph();
ASSERT_NE(hip_graph, nullptr);
ASSERT_EQ(graph.native_graph_exec(), nullptr);
// After instantiation, both native objects are valid.
graph.instantiate();
hipGraphExec_t hip_graph_exec = graph.native_graph_exec();
ASSERT_EQ(graph.native_graph(), hip_graph);
ASSERT_NE(hip_graph_exec, nullptr);
// Submission should not affect the underlying objects.
graph.submit();
ASSERT_EQ(graph.native_graph(), hip_graph);
ASSERT_EQ(graph.native_graph_exec(), hip_graph_exec);
}
// Use native HIP graph to generate a DOT representation.
TEST(TEST_CATEGORY, graph_instantiate_and_debug_dot_print) {
using view_t = Kokkos::View<int, Kokkos::HIP>;
const Kokkos::HIP 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();
size_t num_nodes;
KOKKOS_IMPL_HIP_SAFE_CALL(
hipGraphGetNodes(graph.native_graph(), nullptr, &num_nodes));
ASSERT_EQ(num_nodes, 2u);
const auto dot = std::filesystem::temp_directory_path() / "hip_graph.dot";
KOKKOS_IMPL_HIP_SAFE_CALL(hipGraphDebugDotPrint(
graph.native_graph(), dot.c_str(), hipGraphDebugDotFlagsVerbose));
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 hipGraph_t.
TEST(TEST_CATEGORY, graph_construct_from_native) {
using view_t = Kokkos::View<int, Kokkos::HIPManagedSpace>;
hipGraph_t native_graph = nullptr;
KOKKOS_IMPL_HIP_SAFE_CALL(hipGraphCreate(&native_graph, 0));
const Kokkos::HIP exec{};
Kokkos::Experimental::Graph graph_from_native(exec, native_graph);
ASSERT_EQ(native_graph, graph_from_native.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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