diff options
Diffstat (limited to 'src/cryptonote_core/blockchain.cpp')
| -rw-r--r-- | src/cryptonote_core/blockchain.cpp | 44 |
1 files changed, 43 insertions, 1 deletions
diff --git a/src/cryptonote_core/blockchain.cpp b/src/cryptonote_core/blockchain.cpp index 87ef47c11..4f1b028a1 100644 --- a/src/cryptonote_core/blockchain.cpp +++ b/src/cryptonote_core/blockchain.cpp @@ -158,7 +158,8 @@ Blockchain::Blockchain(tx_memory_pool& tx_pool) : m_db(), m_tx_pool(tx_pool), m_hardfork(NULL), m_timestamps_and_difficulties_height(0), m_current_block_cumul_sz_limit(0), m_current_block_cumul_sz_median(0), m_enforce_dns_checkpoints(false), m_max_prepare_blocks_threads(4), m_db_blocks_per_sync(1), m_db_sync_mode(db_async), m_db_default_sync(false), m_fast_sync(true), m_show_time_stats(false), m_sync_counter(0), m_cancel(false), m_difficulty_for_next_block_top_hash(crypto::null_hash), - m_difficulty_for_next_block(1) + m_difficulty_for_next_block(1), + m_btc_valid(false) { LOG_PRINT_L3("Blockchain::" << __func__); } @@ -632,6 +633,7 @@ block Blockchain::pop_block_from_blockchain() update_next_cumulative_size_limit(); m_tx_pool.on_blockchain_dec(m_db->height()-1, get_tail_id()); + invalidate_block_template_cache(); return popped_block; } @@ -642,6 +644,7 @@ bool Blockchain::reset_and_set_genesis_block(const block& b) CRITICAL_REGION_LOCAL(m_blockchain_lock); m_timestamps_and_difficulties_height = 0; m_alternative_chains.clear(); + invalidate_block_template_cache(); m_db->reset(); m_hardfork->init(); @@ -1212,9 +1215,26 @@ bool Blockchain::create_block_template(block& b, const account_public_address& m LOG_PRINT_L3("Blockchain::" << __func__); size_t median_size; uint64_t already_generated_coins; + uint64_t pool_cookie; CRITICAL_REGION_BEGIN(m_blockchain_lock); height = m_db->height(); + if (m_btc_valid) { + // The pool cookie is atomic. The lack of locking is OK, as if it changes + // just as we compare it, we'll just use a slightly old template, but + // this would be the case anyway if we'd lock, and the change happened + // just after the block template was created + if (!memcmp(&miner_address, &m_btc_address, sizeof(cryptonote::account_public_address)) && m_btc_nonce == ex_nonce && m_btc_pool_cookie == m_tx_pool.cookie()) { + MDEBUG("Using cached template"); + m_btc.timestamp = time(NULL); // update timestamp unconditionally + b = m_btc; + diffic = m_btc_difficulty; + expected_reward = m_btc_expected_reward; + return true; + } + MDEBUG("Not using cached template: address " << (!memcmp(&miner_address, &m_btc_address, sizeof(cryptonote::account_public_address))) << ", nonce " << (m_btc_nonce == ex_nonce) << ", cookie " << (m_btc_pool_cookie == m_tx_pool.cookie())); + invalidate_block_template_cache(); + } b.major_version = m_hardfork->get_current_version(); b.minor_version = m_hardfork->get_ideal_version(); @@ -1241,6 +1261,7 @@ bool Blockchain::create_block_template(block& b, const account_public_address& m { return false; } + pool_cookie = m_tx_pool.cookie(); #if defined(DEBUG_CREATE_BLOCK_TEMPLATE) size_t real_txs_size = 0; uint64_t real_fee = 0; @@ -1355,6 +1376,8 @@ bool Blockchain::create_block_template(block& b, const account_public_address& m MDEBUG("Creating block template: miner tx size " << coinbase_blob_size << ", cumulative size " << cumulative_size << " is now good"); #endif + + cache_block_template(b, miner_address, ex_nonce, diffic, expected_reward, pool_cookie); return true; } LOG_ERROR("Failed to create_block_template with " << 10 << " tries"); @@ -3697,6 +3720,7 @@ leave: // appears to be a NOP *and* is called elsewhere. wat? m_tx_pool.on_blockchain_inc(new_height, id); get_difficulty_for_next_block(); // just to cache it + invalidate_block_template_cache(); return true; } @@ -4666,6 +4690,24 @@ bool Blockchain::for_all_outputs(uint64_t amount, std::function<bool(uint64_t he return m_db->for_all_outputs(amount, f);; } +void Blockchain::invalidate_block_template_cache() +{ + MDEBUG("Invalidating block template cache"); + m_btc_valid = false; +} + +void Blockchain::cache_block_template(const block &b, const cryptonote::account_public_address &address, const blobdata &nonce, const difficulty_type &diff, uint64_t expected_reward, uint64_t pool_cookie) +{ + MDEBUG("Setting block template cache"); + m_btc = b; + m_btc_address = address; + m_btc_nonce = nonce; + m_btc_difficulty = diff; + m_btc_expected_reward = expected_reward; + m_btc_pool_cookie = pool_cookie; + m_btc_valid = true; +} + namespace cryptonote { template bool Blockchain::get_transactions(const std::vector<crypto::hash>&, std::vector<transaction>&, std::vector<crypto::hash>&) const; template bool Blockchain::get_transactions_blobs(const std::vector<crypto::hash>&, std::vector<cryptonote::blobdata>&, std::vector<crypto::hash>&, bool) const; |