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add ChainstateManager::MaybeRebalanceCaches()

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Aside from in unittests, this method is unused at the moment. It will be used
in upcoming commits that enable utxo snapshot activation.
This commit is contained in:
James O'Beirne
2019-09-16 13:37:29 -04:00
committed by James O'Beirne
parent f36aaa6392
commit 8ac3ef4699
4 changed files with 99 additions and 0 deletions
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54
src/test/validation_chainstatemanager_tests.cpp
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@@ -103,4 +103,58 @@ BOOST_AUTO_TEST_CASE(chainstatemanager)
WITH_LOCK(::cs_main, manager.Unload());
}
//! Test rebalancing the caches associated with each chainstate.
BOOST_AUTO_TEST_CASE(chainstatemanager_rebalance_caches)
{
ChainstateManager manager;
size_t max_cache = 10000;
manager.m_total_coinsdb_cache = max_cache;
manager.m_total_coinstip_cache = max_cache;
std::vector<CChainState*> chainstates;
// Create a legacy (IBD) chainstate.
//
ENTER_CRITICAL_SECTION(cs_main);
CChainState& c1 = manager.InitializeChainstate();
LEAVE_CRITICAL_SECTION(cs_main);
chainstates.push_back(&c1);
c1.InitCoinsDB(
/* cache_size_bytes */ 1 << 23, /* in_memory */ true, /* should_wipe */ false);
{
LOCK(::cs_main);
c1.InitCoinsCache(1 << 23);
c1.CoinsTip().SetBestBlock(InsecureRand256());
manager.MaybeRebalanceCaches();
}
BOOST_CHECK_EQUAL(c1.m_coinstip_cache_size_bytes, max_cache);
BOOST_CHECK_EQUAL(c1.m_coinsdb_cache_size_bytes, max_cache);
// Create a snapshot-based chainstate.
//
ENTER_CRITICAL_SECTION(cs_main);
CChainState& c2 = manager.InitializeChainstate(GetRandHash());
LEAVE_CRITICAL_SECTION(cs_main);
chainstates.push_back(&c2);
c2.InitCoinsDB(
/* cache_size_bytes */ 1 << 23, /* in_memory */ true, /* should_wipe */ false);
{
LOCK(::cs_main);
c2.InitCoinsCache(1 << 23);
c2.CoinsTip().SetBestBlock(InsecureRand256());
manager.MaybeRebalanceCaches();
}
// Since both chainstates are considered to be in initial block download,
// the snapshot chainstate should take priority.
BOOST_CHECK_CLOSE(c1.m_coinstip_cache_size_bytes, max_cache * 0.05, 1);
BOOST_CHECK_CLOSE(c1.m_coinsdb_cache_size_bytes, max_cache * 0.05, 1);
BOOST_CHECK_CLOSE(c2.m_coinstip_cache_size_bytes, max_cache * 0.95, 1);
BOOST_CHECK_CLOSE(c2.m_coinsdb_cache_size_bytes, max_cache * 0.95, 1);
}
BOOST_AUTO_TEST_SUITE_END()