// 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 <stdlib.h> #include <sys/stat.h> #include <unistd.h> #include <cerrno> #include "gtest/gtest.h" #include "benchmark/benchmark.h" #include "test/util/logging.h" #include "test/util/test_util.h" #include "test/util/thread_util.h" namespace gvisor { namespace testing { namespace { void BM_Pipe(benchmark::State& state) { int fds[2]; TEST_CHECK(pipe(fds) == 0); const int size = state.range(0); std::vector<char> wbuf(size); std::vector<char> rbuf(size); RandomizeBuffer(wbuf.data(), size); ScopedThread t([&] { auto const fd = fds[1]; for (int i = 0; i < state.max_iterations; i++) { TEST_CHECK(WriteFd(fd, wbuf.data(), wbuf.size()) == size); } }); for (auto _ : state) { TEST_CHECK(ReadFd(fds[0], rbuf.data(), rbuf.size()) == size); } t.Join(); close(fds[0]); close(fds[1]); state.SetBytesProcessed(static_cast<int64_t>(size) * static_cast<int64_t>(state.iterations())); } BENCHMARK(BM_Pipe)->Range(1, 1 << 20)->UseRealTime(); } // namespace } // namespace testing } // namespace gvisor