forked from OSchip/llvm-project
136 lines
3.5 KiB
C++
136 lines
3.5 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "benchmark/benchmark.h"
|
|
|
|
#include <new>
|
|
#include <vector>
|
|
#include <cassert>
|
|
|
|
struct PointerList {
|
|
PointerList* Next = nullptr;
|
|
};
|
|
|
|
struct MallocWrapper {
|
|
__attribute__((always_inline))
|
|
static void* Allocate(size_t N) {
|
|
return std::malloc(N);
|
|
}
|
|
__attribute__((always_inline))
|
|
static void Deallocate(void* P, size_t) {
|
|
std::free(P);
|
|
}
|
|
};
|
|
|
|
struct NewWrapper {
|
|
__attribute__((always_inline))
|
|
static void* Allocate(size_t N) {
|
|
return ::operator new(N);
|
|
}
|
|
__attribute__((always_inline))
|
|
static void Deallocate(void* P, size_t) {
|
|
::operator delete(P);
|
|
}
|
|
};
|
|
|
|
struct BuiltinNewWrapper {
|
|
__attribute__((always_inline))
|
|
static void* Allocate(size_t N) {
|
|
return __builtin_operator_new(N);
|
|
}
|
|
__attribute__((always_inline))
|
|
static void Deallocate(void* P, size_t) {
|
|
__builtin_operator_delete(P);
|
|
}
|
|
};
|
|
|
|
struct BuiltinSizedNewWrapper {
|
|
__attribute__((always_inline))
|
|
static void* Allocate(size_t N) {
|
|
return __builtin_operator_new(N);
|
|
}
|
|
__attribute__((always_inline))
|
|
static void Deallocate(void* P, size_t N) {
|
|
__builtin_operator_delete(P, N);
|
|
}
|
|
};
|
|
|
|
|
|
template <class AllocWrapper>
|
|
static void BM_AllocateAndDeallocate(benchmark::State& st) {
|
|
const size_t alloc_size = st.range(0);
|
|
while (st.KeepRunning()) {
|
|
void* p = AllocWrapper::Allocate(alloc_size);
|
|
benchmark::DoNotOptimize(p);
|
|
AllocWrapper::Deallocate(p, alloc_size);
|
|
}
|
|
}
|
|
|
|
|
|
template <class AllocWrapper>
|
|
static void BM_AllocateOnly(benchmark::State& st) {
|
|
const size_t alloc_size = st.range(0);
|
|
PointerList *Start = nullptr;
|
|
|
|
while (st.KeepRunning()) {
|
|
PointerList* p = (PointerList*)AllocWrapper::Allocate(alloc_size);
|
|
benchmark::DoNotOptimize(p);
|
|
p->Next = Start;
|
|
Start = p;
|
|
}
|
|
|
|
PointerList *Next = Start;
|
|
while (Next) {
|
|
PointerList *Tmp = Next;
|
|
Next = Tmp->Next;
|
|
AllocWrapper::Deallocate(Tmp, alloc_size);
|
|
}
|
|
}
|
|
|
|
template <class AllocWrapper>
|
|
static void BM_DeallocateOnly(benchmark::State& st) {
|
|
const size_t alloc_size = st.range(0);
|
|
const auto NumAllocs = st.max_iterations;
|
|
|
|
std::vector<void*> Pointers(NumAllocs);
|
|
for (auto& p : Pointers) {
|
|
p = AllocWrapper::Allocate(alloc_size);
|
|
}
|
|
|
|
void** Data = Pointers.data();
|
|
void** const End = Pointers.data() + Pointers.size();
|
|
while (st.KeepRunning()) {
|
|
AllocWrapper::Deallocate(*Data, alloc_size);
|
|
Data += 1;
|
|
}
|
|
assert(Data == End);
|
|
}
|
|
|
|
static int RegisterAllocBenchmarks() {
|
|
using FnType = void(*)(benchmark::State&);
|
|
struct {
|
|
const char* name;
|
|
FnType func;
|
|
} TestCases[] = {
|
|
{"BM_Malloc", &BM_AllocateAndDeallocate<MallocWrapper>},
|
|
{"BM_New", &BM_AllocateAndDeallocate<NewWrapper>},
|
|
{"BM_BuiltinNewDelete", BM_AllocateAndDeallocate<BuiltinNewWrapper>},
|
|
{"BM_BuiltinSizedNewDelete", BM_AllocateAndDeallocate<BuiltinSizedNewWrapper>},
|
|
{"BM_BuiltinNewAllocateOnly", BM_AllocateOnly<BuiltinSizedNewWrapper>},
|
|
{"BM_BuiltinNewSizedDeallocateOnly", BM_DeallocateOnly<BuiltinSizedNewWrapper>},
|
|
|
|
};
|
|
for (auto TC : TestCases) {
|
|
benchmark::RegisterBenchmark(TC.name, TC.func)->Range(16, 4096 * 2);
|
|
}
|
|
return 0;
|
|
}
|
|
int Sink = RegisterAllocBenchmarks();
|
|
|
|
BENCHMARK_MAIN();
|