Merge pull request #8455

099fc1f Fixed get_block_template_backlog performance (SChernykh)
This commit is contained in:
luigi1111 2022-08-08 20:29:56 -05:00
commit 5c33f40cd8
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2 changed files with 57 additions and 18 deletions

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@ -925,26 +925,61 @@ namespace cryptonote
{
CRITICAL_REGION_LOCAL(m_transactions_lock);
CRITICAL_REGION_LOCAL1(m_blockchain);
const relay_category category = include_sensitive ? relay_category::all : relay_category::broadcasted;
backlog.reserve(m_blockchain.get_txpool_tx_count(include_sensitive));
txpool_tx_meta_t tmp_meta;
m_blockchain.for_all_txpool_txes([this, &backlog, &tmp_meta](const crypto::hash &txid, const txpool_tx_meta_t &meta, const cryptonote::blobdata_ref *bd){
transaction tx;
if (!(meta.pruned ? parse_and_validate_tx_base_from_blob(*bd, tx) : parse_and_validate_tx_from_blob(*bd, tx)))
{
MERROR("Failed to parse tx from txpool");
// continue
return true;
}
tx.set_hash(txid);
tmp_meta = meta;
if (is_transaction_ready_to_go(tmp_meta, txid, *bd, tx))
backlog.push_back({txid, meta.weight, meta.fee});
std::vector<tx_block_template_backlog_entry> tmp;
uint64_t total_weight = 0;
// First get everything from the mempool, filter it later
m_blockchain.for_all_txpool_txes([&tmp, &total_weight](const crypto::hash &txid, const txpool_tx_meta_t &meta, const cryptonote::blobdata_ref*){
tmp.emplace_back(tx_block_template_backlog_entry{txid, meta.weight, meta.fee});
total_weight += meta.weight;
return true;
}, true, category);
}, false, include_sensitive ? relay_category::all : relay_category::broadcasted);
// Limit backlog to 112.5% of current median weight. This is enough to mine a full block with the optimal block reward
const uint64_t median_weight = m_blockchain.get_current_cumulative_block_weight_median();
const uint64_t max_backlog_weight = median_weight + (median_weight / 8);
// If the total weight is too high, choose the best paying transactions
if (total_weight > max_backlog_weight)
std::sort(tmp.begin(), tmp.end(), [](const auto& a, const auto& b){ return a.fee * b.weight > b.fee * a.weight; });
backlog.clear();
uint64_t w = 0;
std::unordered_set<crypto::key_image> k_images;
for (const tx_block_template_backlog_entry& e : tmp)
{
try
{
txpool_tx_meta_t meta;
if (!m_blockchain.get_txpool_tx_meta(e.id, meta))
continue;
cryptonote::blobdata txblob;
if (!m_blockchain.get_txpool_tx_blob(e.id, txblob, relay_category::all))
continue;
cryptonote::transaction tx;
if (is_transaction_ready_to_go(meta, e.id, txblob, tx))
{
if (have_key_images(k_images, tx))
continue;
append_key_images(k_images, tx);
backlog.push_back(e);
w += e.weight;
if (w > max_backlog_weight)
break;
}
}
catch (const std::exception &e)
{
MERROR("Failed to check transaction readiness: " << e.what());
// continue, not fatal
}
}
}
//------------------------------------------------------------------
void tx_memory_pool::get_transaction_stats(struct txpool_stats& stats, bool include_sensitive) const

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@ -266,7 +266,11 @@ namespace cryptonote
void get_transaction_backlog(std::vector<tx_backlog_entry>& backlog, bool include_sensitive = false) const;
/**
* @brief get (hash, weight, fee) for all transactions in the pool - the minimum required information to create a block template
* @brief get (hash, weight, fee) for transactions in the pool - the minimum required information to create a block template
*
* Not all transactions in the pool will be returned for performance reasons
* If there are too many transactions in the pool, only the highest-paying transactions
* will be returned - but enough for the miner to create a full block
*
* @param backlog return-by-reference that data
* @param include_sensitive return stempool, anonymity-pool, and unrelayed txes