63 lines
1.9 KiB
C++
63 lines
1.9 KiB
C++
// Copyright 2020 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include "gtest/gtest.h"
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#include "absl/strings/str_cat.h"
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#include "benchmark/benchmark.h"
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#include "test/util/fs_util.h"
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#include "test/util/temp_path.h"
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#include "test/util/test_util.h"
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namespace gvisor {
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namespace testing {
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namespace {
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// Creates a file in a nested directory hierarchy at least `depth` directories
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// deep, and stats that file multiple times.
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void BM_Stat(benchmark::State& state) {
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// Create nested directories with given depth.
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int depth = state.range(0);
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const TempPath top_dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
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std::string dir_path = top_dir.path();
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while (depth-- > 0) {
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// Don't use TempPath because it will make paths too long to use.
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//
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// The top_dir destructor will clean up this whole tree.
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dir_path = JoinPath(dir_path, absl::StrCat(depth));
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ASSERT_NO_ERRNO(Mkdir(dir_path, 0755));
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}
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// Create the file that will be stat'd.
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const TempPath file =
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ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileIn(dir_path));
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struct stat st;
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for (auto _ : state) {
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ASSERT_THAT(stat(file.path().c_str(), &st), SyscallSucceeds());
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}
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}
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BENCHMARK(BM_Stat)->Range(1, 100)->UseRealTime();
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} // namespace
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} // namespace testing
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} // namespace gvisor
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