mirror of
https://github.com/bitcoin/bitcoin.git
synced 2025-02-13 11:25:02 -05:00
ce881bf9fc
This changes the PoolAllocator to default the alignment to the given type. This makes the code simpler, and most importantly fixes a bug on ARM 32bit that caused OOM: The class CTxOut has a member CAmount which is an int64_t and on ARM 32bit int64_t are 8 byte aligned which is larger than the pointer alignment of 4 bytes. So for CCoinsMap to be able to use the pool, we need to use the alignment of the member instead of just alignof(void*).
49 lines
1.9 KiB
C++
49 lines
1.9 KiB
C++
// Copyright (c) 2022 The Bitcoin Core developers
|
|
// Distributed under the MIT software license, see the accompanying
|
|
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
|
|
|
|
#include <bench/bench.h>
|
|
#include <support/allocators/pool.h>
|
|
|
|
#include <unordered_map>
|
|
|
|
template <typename Map>
|
|
void BenchFillClearMap(benchmark::Bench& bench, Map& map)
|
|
{
|
|
size_t batch_size = 5000;
|
|
|
|
// make sure each iteration of the benchmark contains exactly 5000 inserts and one clear.
|
|
// do this at least 10 times so we get reasonable accurate results
|
|
|
|
bench.batch(batch_size).minEpochIterations(10).run([&] {
|
|
auto rng = ankerl::nanobench::Rng(1234);
|
|
for (size_t i = 0; i < batch_size; ++i) {
|
|
map[rng()];
|
|
}
|
|
map.clear();
|
|
});
|
|
}
|
|
|
|
static void PoolAllocator_StdUnorderedMap(benchmark::Bench& bench)
|
|
{
|
|
auto map = std::unordered_map<uint64_t, uint64_t>();
|
|
BenchFillClearMap(bench, map);
|
|
}
|
|
|
|
static void PoolAllocator_StdUnorderedMapWithPoolResource(benchmark::Bench& bench)
|
|
{
|
|
using Map = std::unordered_map<uint64_t,
|
|
uint64_t,
|
|
std::hash<uint64_t>,
|
|
std::equal_to<uint64_t>,
|
|
PoolAllocator<std::pair<const uint64_t, uint64_t>,
|
|
sizeof(std::pair<const uint64_t, uint64_t>) + 4 * sizeof(void*)>>;
|
|
|
|
// make sure the resource supports large enough pools to hold the node. We do this by adding the size of a few pointers to it.
|
|
auto pool_resource = Map::allocator_type::ResourceType();
|
|
auto map = Map{0, std::hash<uint64_t>{}, std::equal_to<uint64_t>{}, &pool_resource};
|
|
BenchFillClearMap(bench, map);
|
|
}
|
|
|
|
BENCHMARK(PoolAllocator_StdUnorderedMap, benchmark::PriorityLevel::HIGH);
|
|
BENCHMARK(PoolAllocator_StdUnorderedMapWithPoolResource, benchmark::PriorityLevel::HIGH);
|