diff options
Diffstat (limited to 'abseil-cpp/absl/debugging/stacktrace_benchmark.cc')
-rw-r--r-- | abseil-cpp/absl/debugging/stacktrace_benchmark.cc | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/abseil-cpp/absl/debugging/stacktrace_benchmark.cc b/abseil-cpp/absl/debugging/stacktrace_benchmark.cc new file mode 100644 index 0000000..9360baf --- /dev/null +++ b/abseil-cpp/absl/debugging/stacktrace_benchmark.cc @@ -0,0 +1,55 @@ +// Copyright 2022 The Abseil 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 +// +// https://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 "absl/base/attributes.h" +#include "absl/base/config.h" +#include "absl/base/optimization.h" +#include "absl/debugging/stacktrace.h" +#include "benchmark/benchmark.h" + +namespace absl { +ABSL_NAMESPACE_BEGIN +namespace { + +static constexpr int kMaxStackDepth = 100; +static constexpr int kCacheSize = (1 << 16); +void* pcs[kMaxStackDepth]; + +ABSL_ATTRIBUTE_NOINLINE void func(benchmark::State& state, int x, int depth) { + if (x <= 0) { + // Touch a significant amount of memory so that the stack is likely to be + // not cached in the L1 cache. + state.PauseTiming(); + int* arr = new int[kCacheSize]; + for (int i = 0; i < kCacheSize; ++i) benchmark::DoNotOptimize(arr[i] = 100); + delete[] arr; + state.ResumeTiming(); + benchmark::DoNotOptimize(absl::GetStackTrace(pcs, depth, 0)); + return; + } + ABSL_BLOCK_TAIL_CALL_OPTIMIZATION(); + func(state, --x, depth); +} + +void BM_GetStackTrace(benchmark::State& state) { + int depth = state.range(0); + for (auto s : state) { + func(state, depth, depth); + } +} + +BENCHMARK(BM_GetStackTrace)->DenseRange(10, kMaxStackDepth, 10); +} // namespace +ABSL_NAMESPACE_END +} // namespace absl |