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Add a few read txns to streamline 

Slight perf gain, but mainly to reduce spam at loglevel 3
This commit is contained in:
Howard Chu 2017-02-18 17:27:33 +00:00
parent 59c9d165f8
commit dc53e9eef2
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GPG Key ID: FD2A70B44AB11BA7
3 changed files with 11 additions and 3 deletions
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8
src/blockchain_db/lmdb/db_lmdb.cpp
View File

@ -561,7 +561,7 @@ uint64_t BlockchainLMDB::get_estimated_batch_size(uint64_t batch_num_blocks) con
{ {
LOG_PRINT_L1("No existing blocks to check for average block size"); LOG_PRINT_L1("No existing blocks to check for average block size");
} }
else if (m_cum_count) else if (m_cum_count >= num_prev_blocks)
{ {
avg_block_size = m_cum_size / m_cum_count; avg_block_size = m_cum_size / m_cum_count;
LOG_PRINT_L1("average block size across recent " << m_cum_count << " blocks: " << avg_block_size); LOG_PRINT_L1("average block size across recent " << m_cum_count << " blocks: " << avg_block_size);
@ -570,6 +570,9 @@ uint64_t BlockchainLMDB::get_estimated_batch_size(uint64_t batch_num_blocks) con
} }
else else
{ {
MDB_txn *rtxn;
mdb_txn_cursors *rcurs;
block_rtxn_start(&rtxn, &rcurs);
for (uint64_t block_num = block_start; block_num <= block_stop; ++block_num) for (uint64_t block_num = block_start; block_num <= block_stop; ++block_num)
{ {
uint32_t block_size = get_block_size(block_num); uint32_t block_size = get_block_size(block_num);
@ -578,6 +581,7 @@ uint64_t BlockchainLMDB::get_estimated_batch_size(uint64_t batch_num_blocks) con
// some blocks were to be skipped for being outliers. // some blocks were to be skipped for being outliers.
++num_blocks_used; ++num_blocks_used;
} }
block_rtxn_stop();
avg_block_size = total_block_size / num_blocks_used; avg_block_size = total_block_size / num_blocks_used;
LOG_PRINT_L1("average block size across recent " << num_blocks_used << " blocks: " << avg_block_size); LOG_PRINT_L1("average block size across recent " << num_blocks_used << " blocks: " << avg_block_size);
} }
@ -1000,7 +1004,7 @@ tx_out BlockchainLMDB::output_from_blob(const blobdata& blob) const
void BlockchainLMDB::check_open() const void BlockchainLMDB::check_open() const
{ {
LOG_PRINT_L3("BlockchainLMDB::" << __func__); // LOG_PRINT_L3("BlockchainLMDB::" << __func__);
if (!m_open) if (!m_open)
throw0(DB_ERROR("DB operation attempted on a not-open DB instance")); throw0(DB_ERROR("DB operation attempted on a not-open DB instance"));
} }

2
src/blockchain_db/lmdb/db_lmdb.h
View File

@ -372,7 +372,7 @@ private:
uint64_t m_num_txs; uint64_t m_num_txs;
uint64_t m_num_outputs; uint64_t m_num_outputs;
mutable uint64_t m_cum_size; // used in batch size estimation mutable uint64_t m_cum_size; // used in batch size estimation
mutable int m_cum_count; mutable unsigned int m_cum_count;
std::string m_folder; std::string m_folder;
mdb_txn_safe* m_write_txn; // may point to either a short-lived txn or a batch txn mdb_txn_safe* m_write_txn; // may point to either a short-lived txn or a batch txn
mdb_txn_safe* m_write_batch_txn; // persist batch txn outside of BlockchainLMDB mdb_txn_safe* m_write_batch_txn; // persist batch txn outside of BlockchainLMDB

4
src/cryptonote_core/blockchain.cpp
View File

@ -1986,12 +1986,14 @@ bool Blockchain::find_blockchain_supplement(const std::list<crypto::hash>& qbloc
return false; return false;
} }
m_db->block_txn_start(true);
resp.total_height = get_current_blockchain_height(); resp.total_height = get_current_blockchain_height();
size_t count = 0; size_t count = 0;
for(size_t i = resp.start_height; i < resp.total_height && count < BLOCKS_IDS_SYNCHRONIZING_DEFAULT_COUNT; i++, count++) for(size_t i = resp.start_height; i < resp.total_height && count < BLOCKS_IDS_SYNCHRONIZING_DEFAULT_COUNT; i++, count++)
{ {
resp.m_block_ids.push_back(m_db->get_block_hash_from_height(i)); resp.m_block_ids.push_back(m_db->get_block_hash_from_height(i));
} }
m_db->block_txn_stop();
return true; return true;
} }
//------------------------------------------------------------------ //------------------------------------------------------------------
@ -2022,6 +2024,7 @@ bool Blockchain::find_blockchain_supplement(const uint64_t req_start_block, cons
} }
} }
m_db->block_txn_start(true);
total_height = get_current_blockchain_height(); total_height = get_current_blockchain_height();
size_t count = 0; size_t count = 0;
for(size_t i = start_height; i < total_height && count < max_count; i++, count++) for(size_t i = start_height; i < total_height && count < max_count; i++, count++)
@ -2032,6 +2035,7 @@ bool Blockchain::find_blockchain_supplement(const uint64_t req_start_block, cons
get_transactions(blocks.back().first.tx_hashes, blocks.back().second, mis); get_transactions(blocks.back().first.tx_hashes, blocks.back().second, mis);
CHECK_AND_ASSERT_MES(!mis.size(), false, "internal error, transaction from block not found"); CHECK_AND_ASSERT_MES(!mis.size(), false, "internal error, transaction from block not found");
} }
m_db->block_txn_stop();
return true; return true;
} }
//------------------------------------------------------------------ //------------------------------------------------------------------