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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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30
src/validation.cpp
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@ -5297,3 +5297,33 @@ void ChainstateManager::Reset()
m_active_chainstate = nullptr;
m_snapshot_validated = false;
}
void ChainstateManager::MaybeRebalanceCaches()
{
if (m_ibd_chainstate && !m_snapshot_chainstate) {
LogPrintf("[snapshot] allocating all cache to the IBD chainstate\n");
// Allocate everything to the IBD chainstate.
m_ibd_chainstate->ResizeCoinsCaches(m_total_coinstip_cache, m_total_coinsdb_cache);
}
else if (m_snapshot_chainstate && !m_ibd_chainstate) {
LogPrintf("[snapshot] allocating all cache to the snapshot chainstate\n");
// Allocate everything to the snapshot chainstate.
m_snapshot_chainstate->ResizeCoinsCaches(m_total_coinstip_cache, m_total_coinsdb_cache);
}
else if (m_ibd_chainstate && m_snapshot_chainstate) {
// If both chainstates exist, determine who needs more cache based on IBD status.
//
// Note: shrink caches first so that we don't inadvertently overwhelm available memory.
if (m_snapshot_chainstate->IsInitialBlockDownload()) {
m_ibd_chainstate->ResizeCoinsCaches(
m_total_coinstip_cache * 0.05, m_total_coinsdb_cache * 0.05);
m_snapshot_chainstate->ResizeCoinsCaches(
m_total_coinstip_cache * 0.95, m_total_coinsdb_cache * 0.95);
} else {
m_snapshot_chainstate->ResizeCoinsCaches(
m_total_coinstip_cache * 0.05, m_total_coinsdb_cache * 0.05);
m_ibd_chainstate->ResizeCoinsCaches(
m_total_coinstip_cache * 0.95, m_total_coinsdb_cache * 0.95);
}
}
}