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// 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();
void BM_Append(benchmark::State& state) {
auto file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
auto fd = ASSERT_NO_ERRNO_AND_VALUE(Open(file.path(), O_WRONLY | O_APPEND));
const char data = 'a';
for (auto _ : state) {
TEST_CHECK(WriteFd(fd.get(), &data, 1) == 1);
}
}
BENCHMARK(BM_Append);
} // namespace
} // namespace testing
} // namespace gvisor
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