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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 <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
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