| // 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 <cstdint> |
| #include <ostream> |
| #include <thread> |
| #include <vector> |
| |
| #include <glog/logging.h> |
| #include <gtest/gtest.h> |
| |
| #include "kudu/util/monotime.h" |
| #include "kudu/util/process_memory.h" |
| |
| using std::atomic; |
| using std::thread; |
| using std::vector; |
| |
| namespace kudu { |
| |
| // Microbenchmark for our new/delete hooks which track process-wide |
| // memory consumption. |
| TEST(ProcessMemory, BenchmarkConsumptionTracking) { |
| const int kNumThreads = 200; |
| vector<thread> threads; |
| atomic<bool> done(false); |
| atomic<int64_t> total_count(0); |
| |
| // We start many threads, each of which performs 10:1 ratio of |
| // new/delete pairs to consumption lookups. The high number |
| // of threads highlights when there is contention on central |
| // tcmalloc locks. |
| for (int i = 0; i < kNumThreads; i++) { |
| threads.emplace_back([&]() { |
| int64_t local_count = 0; |
| while (!done) { |
| for (int a = 0; a < 10; a++) { |
| // Mark 'x' volatile so that the compiler does not optimize out the |
| // allocation. |
| char* volatile x = new char[8000]; |
| delete[] x; |
| } |
| process_memory::CurrentConsumption(); |
| local_count++; |
| } |
| total_count += local_count; |
| }); |
| } |
| double secs = 3; |
| SleepFor(MonoDelta::FromSeconds(secs)); |
| done = true; |
| |
| for (auto& t : threads) { |
| t.join(); |
| } |
| |
| LOG(INFO) << "Performed " << total_count / secs << " iters/sec"; |
| } |
| |
| } // namespace kudu |