// 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 <fcntl.h> #include <stdlib.h> #include <sys/stat.h> #include <unistd.h> #include "gtest/gtest.h" #include "benchmark/benchmark.h" #include "test/util/fs_util.h" #include "test/util/logging.h" #include "test/util/temp_path.h" #include "test/util/test_util.h" namespace gvisor { namespace testing { namespace { void BM_Read(benchmark::State& state) { const int size = state.range(0); const std::string contents(size, 0); auto path = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith( GetAbsoluteTestTmpdir(), contents, TempPath::kDefaultFileMode)); FileDescriptor fd = ASSERT_NO_ERRNO_AND_VALUE(Open(path.path(), O_RDONLY)); std::vector<char> buf(size); for (auto _ : state) { TEST_CHECK(PreadFd(fd.get(), buf.data(), buf.size(), 0) == size); } state.SetBytesProcessed(static_cast<int64_t>(size) * static_cast<int64_t>(state.iterations())); } BENCHMARK(BM_Read)->Range(1, 1 << 26)->UseRealTime(); } // namespace } // namespace testing } // namespace gvisor