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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 <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include "gtest/gtest.h"
#include "benchmark/benchmark.h"
#include "test/util/fs_util.h"
#include "test/util/temp_path.h"
#include "test/util/test_util.h"
namespace gvisor {
namespace testing {
namespace {
// Creates a directory containing `files` files, and unlinks all the files.
void BM_Unlink(benchmark::State& state) {
// Create directory with given files.
const int file_count = state.range(0);
// We unlink all files on each iteration, but report this as a "batch"
// iteration so that reported times are per file.
TempPath dir;
while (state.KeepRunningBatch(file_count)) {
state.PauseTiming();
// N.B. dir is declared outside the loop so that destruction of the previous
// iteration's directory occurs here, inside of PauseTiming.
dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
std::vector<TempPath> files;
for (int i = 0; i < file_count; i++) {
TempPath file =
ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileIn(dir.path()));
files.push_back(std::move(file));
}
state.ResumeTiming();
while (!files.empty()) {
// Destructor unlinks.
files.pop_back();
}
}
state.SetItemsProcessed(state.iterations());
}
BENCHMARK(BM_Unlink)->Range(1, 100 * 1000)->UseRealTime();
} // namespace
} // namespace testing
} // namespace gvisor
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