// Copyright 2020 The gVisor Authors. // // Licensed 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 <sys/stat.h> #include <sys/types.h> #include <unistd.h> #include "gtest/gtest.h" #include "absl/strings/str_cat.h" #include "benchmark/benchmark.h" #include "test/util/fs_util.h" #include "test/util/temp_path.h" #include "test/util/test_util.h" namespace gvisor { namespace testing { namespace { // Creates a file in a nested directory hierarchy at least `depth` directories // deep, and stats that file multiple times. void BM_Stat(benchmark::State& state) { // Create nested directories with given depth. int depth = state.range(0); const TempPath top_dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir()); std::string dir_path = top_dir.path(); while (depth-- > 0) { // Don't use TempPath because it will make paths too long to use. // // The top_dir destructor will clean up this whole tree. dir_path = JoinPath(dir_path, absl::StrCat(depth)); ASSERT_NO_ERRNO(Mkdir(dir_path, 0755)); } // Create the file that will be stat'd. const TempPath file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileIn(dir_path)); struct stat st; for (auto _ : state) { ASSERT_THAT(stat(file.path().c_str(), &st), SyscallSucceeds()); } } BENCHMARK(BM_Stat)->Range(1, 100)->UseRealTime(); } // namespace } // namespace testing } // namespace gvisor