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Use PoolAllocator for CCoinsMap

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In my benchmarks, using this pool allocator for CCoinsMap gives about
20% faster `-reindex-chainstate` with -dbcache=5000 with practically the
same memory usage. The change in max RSS changed was 0.3%.

The `validation_flush_tests` tests need to be updated because
memory allocation is now done in large pools instead of one node at a
time, so the limits need to be updated accordingly.
This commit is contained in:
Martin Leitner-Ankerl
2022-06-11 11:27:38 +02:00
parent 5e4ac5abf5
commit 9f947fc3d4
5 changed files with 79 additions and 17 deletions
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6
src/coins.cpp
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@@ -34,7 +34,7 @@ size_t CCoinsViewBacked::EstimateSize() const { return base->EstimateSize(); }
CCoinsViewCache::CCoinsViewCache(CCoinsView* baseIn, bool deterministic) :
CCoinsViewBacked(baseIn), m_deterministic(deterministic),
cacheCoins(0, SaltedOutpointHasher(/*deterministic=*/deterministic))
cacheCoins(0, SaltedOutpointHasher(/*deterministic=*/deterministic), CCoinsMap::key_equal{}, &m_cache_coins_memory_resource)
{}
size_t CCoinsViewCache::DynamicMemoryUsage() const {
@@ -317,7 +317,9 @@ void CCoinsViewCache::ReallocateCache()
// Cache should be empty when we're calling this.
assert(cacheCoins.size() == 0);
cacheCoins.~CCoinsMap();
::new (&cacheCoins) CCoinsMap(0, SaltedOutpointHasher(/*deterministic=*/m_deterministic));
m_cache_coins_memory_resource.~CCoinsMapMemoryResource();
::new (&m_cache_coins_memory_resource) CCoinsMapMemoryResource{};
::new (&cacheCoins) CCoinsMap{0, SaltedOutpointHasher{/*deterministic=*/m_deterministic}, CCoinsMap::key_equal{}, &m_cache_coins_memory_resource};
}
void CCoinsViewCache::SanityCheck() const