/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. */ #include <atomic> #include <memory> #include <thread> #include <gtest/gtest.h> #include <tvm/runtime/c_backend_api.h> constexpr size_t N = 128; static FTVMParallelLambda atomic_add_task_id = [](int task_id, TVMParallelGroupEnv* penv, void* cdata) -> int { auto* data = reinterpret_cast<std::atomic<size_t>*>(cdata); const size_t N_per_task = (N + penv->num_task - 1) / penv->num_task; for (size_t i = task_id * N_per_task; i < N && i < (task_id + 1) * N_per_task; ++i) { data->fetch_add(i, std::memory_order_relaxed); } return 0; }; TEST(ThreadingBackend, TVMBackendParallelLaunch) { std::atomic<size_t> acc(0); TVMBackendParallelLaunch(atomic_add_task_id, &acc, 0); EXPECT_EQ(acc.load(std::memory_order_relaxed), N * (N - 1) / 2); } TEST(ThreadingBackend, TVMBackendParallelLaunchMultipleThreads) { // TODO(tulloch) use parameterised tests when available. size_t num_jobs_per_thread = 3; size_t max_num_threads = 2; for (size_t num_threads = 1; num_threads < max_num_threads; ++num_threads) { std::vector<std::unique_ptr<std::thread>> ts; for (size_t i = 0; i < num_threads; ++i) { ts.emplace_back(new std::thread([&]() { for (size_t j = 0; j < num_jobs_per_thread; ++j) { std::atomic<size_t> acc(0); TVMBackendParallelLaunch(atomic_add_task_id, &acc, 0); EXPECT_EQ(acc.load(std::memory_order_relaxed), N * (N - 1) / 2); } })); } for (auto& t : ts) { t->join(); } } } int main(int argc, char** argv) { testing::InitGoogleTest(&argc, argv); testing::FLAGS_gtest_death_test_style = "threadsafe"; return RUN_ALL_TESTS(); }