Abseil Common Libraries (C++) (grcp 依赖)
https://abseil.io/
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
55 lines
1.7 KiB
55 lines
1.7 KiB
// 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
|
|
|