// 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/logging.h" #include "test/util/temp_path.h" #include "test/util/test_util.h" namespace gvisor { namespace testing { namespace { void BM_Write(benchmark::State& state) { auto f = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile()); FileDescriptor fd = ASSERT_NO_ERRNO_AND_VALUE(Open(f.path(), O_WRONLY)); const int size = state.range(0); std::vector<char> buf(size); RandomizeBuffer(buf.data(), size); for (auto _ : state) { TEST_CHECK(PwriteFd(fd.get(), buf.data(), size, 0) == size); } state.SetBytesProcessed(static_cast<int64_t>(size) * static_cast<int64_t>(state.iterations())); } BENCHMARK(BM_Write)->Range(1, 1 << 26)->UseRealTime(); } // namespace } // namespace testing } // namespace gvisor