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https://github.com/Cuprate/cuprate.git
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cache sorted long and short term block weights
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parent
9471ca5d6a
commit
f025513950
3 changed files with 84 additions and 36 deletions
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@ -24,7 +24,7 @@ use monero_consensus::{
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mod tx_pool;
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const MAX_BLOCKS_IN_RANGE: u64 = 1000;
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const MAX_BLOCKS_HEADERS_IN_RANGE: u64 = 250;
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const MAX_BLOCKS_HEADERS_IN_RANGE: u64 = 500;
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/// Calls for a batch of blocks, returning the response and the time it took.
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async fn call_batch<D: Database>(
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@ -229,13 +229,14 @@ async fn main() {
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let rpc_config = RpcConfig::new(MAX_BLOCKS_IN_RANGE, MAX_BLOCKS_HEADERS_IN_RANGE);
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let rpc_config = Arc::new(RwLock::new(rpc_config));
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tracing::info!("Attempting to open cache at: {}", file_for_cache.display());
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let cache = match ScanningCache::load(&file_for_cache) {
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Ok(cache) => {
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tracing::info!("Reloaded from cache, chain height: {}", cache.height);
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Arc::new(RwLock::new(cache))
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}
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Err(_) => {
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tracing::info!("Couldn't load from cache starting from scratch");
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tracing::warn!("Couldn't load from cache starting from scratch");
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let mut cache = ScanningCache::default();
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let genesis = monero_consensus::genesis::generate_genesis_block(&network);
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@ -297,12 +297,10 @@ impl Service<BlockChainContextRequest> for BlockChainContextService {
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next_difficulty: difficulty_cache.next_difficulty(¤t_hf),
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cumulative_difficulty: difficulty_cache.cumulative_difficulty(),
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effective_median_weight: weight_cache
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.effective_median_block_weight(¤t_hf)
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.await,
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median_long_term_weight: weight_cache.median_long_term_weight().await,
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.effective_median_block_weight(¤t_hf),
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median_long_term_weight: weight_cache.median_long_term_weight(),
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median_weight_for_block_reward: weight_cache
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.median_for_block_reward(¤t_hf)
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.await,
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.median_for_block_reward(¤t_hf),
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already_generated_coins: *already_generated_coins,
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top_block_timestamp: difficulty_cache.top_block_timestamp(),
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median_block_timestamp: difficulty_cache.median_timestamp(
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@ -77,6 +77,14 @@ impl BlockWeightsCacheConfig {
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pub struct BlockWeightsCache {
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short_term_block_weights: VecDeque<usize>,
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long_term_weights: VecDeque<usize>,
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/// The short term block weights sorted so we don't have to sort them every time we need
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/// the median.
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cached_sorted_long_term_weights: Vec<usize>,
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/// The long term block weights sorted so we don't have to sort them every time we need
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/// the median.
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cached_sorted_short_term_weights: Vec<usize>,
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/// The height of the top block.
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tip_height: u64,
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@ -93,25 +101,37 @@ impl BlockWeightsCache {
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) -> Result<Self, ConsensusError> {
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tracing::info!("Initializing weight cache this may take a while.");
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let long_term_weights: VecDeque<usize> = get_long_term_weight_in_range(
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let long_term_weights = get_long_term_weight_in_range(
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chain_height.saturating_sub(config.long_term_window)..chain_height,
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database.clone(),
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)
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.await?
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.into();
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.await?;
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let short_term_block_weights: VecDeque<usize> = get_blocks_weight_in_range(
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let short_term_block_weights = get_blocks_weight_in_range(
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chain_height.saturating_sub(config.short_term_window)..chain_height,
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database,
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)
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.await?
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.into();
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.await?;
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tracing::info!("Initialized block weight cache, chain-height: {:?}, long term weights length: {:?}, short term weights length: {:?}", chain_height, long_term_weights.len(), short_term_block_weights.len());
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let mut cloned_short_term_weights = short_term_block_weights.clone();
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let mut cloned_long_term_weights = long_term_weights.clone();
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Ok(BlockWeightsCache {
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short_term_block_weights,
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long_term_weights,
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short_term_block_weights: short_term_block_weights.into(),
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long_term_weights: long_term_weights.into(),
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cached_sorted_long_term_weights: rayon_spawn_async(|| {
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cloned_long_term_weights.par_sort_unstable();
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cloned_long_term_weights
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})
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.await,
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cached_sorted_short_term_weights: rayon_spawn_async(|| {
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cloned_short_term_weights.par_sort_unstable();
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cloned_short_term_weights
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})
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.await,
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tip_height: chain_height - 1,
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config,
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})
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@ -132,59 +152,88 @@ impl BlockWeightsCache {
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);
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self.long_term_weights.push_back(long_term_weight);
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match self
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.cached_sorted_long_term_weights
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.binary_search(&long_term_weight)
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{
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Ok(idx) | Err(idx) => self
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.cached_sorted_long_term_weights
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.insert(idx, long_term_weight),
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}
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if u64::try_from(self.long_term_weights.len()).unwrap() > self.config.long_term_window {
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self.long_term_weights.pop_front();
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let val = self
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.long_term_weights
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.pop_front()
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.expect("long term window can't be negative");
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match self.cached_sorted_long_term_weights.binary_search(&val) {
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Ok(idx) | Err(idx) => self.cached_sorted_long_term_weights.remove(idx),
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};
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}
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self.short_term_block_weights.push_back(block_weight);
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match self
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.cached_sorted_short_term_weights
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.binary_search(&long_term_weight)
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{
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Ok(idx) | Err(idx) => self
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.cached_sorted_short_term_weights
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.insert(idx, long_term_weight),
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}
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if u64::try_from(self.short_term_block_weights.len()).unwrap()
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> self.config.short_term_window
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{
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self.short_term_block_weights.pop_front();
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let val = self
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.short_term_block_weights
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.pop_front()
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.expect("short term window can't be negative");
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match self.cached_sorted_short_term_weights.binary_search(&val) {
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Ok(idx) | Err(idx) => self.cached_sorted_short_term_weights.remove(idx),
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};
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}
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debug_assert_eq!(
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self.cached_sorted_long_term_weights.len(),
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self.long_term_weights.len()
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);
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debug_assert_eq!(
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self.cached_sorted_short_term_weights.len(),
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self.short_term_block_weights.len()
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);
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}
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/// Returns the median long term weight over the last [`LONG_TERM_WINDOW`] blocks, or custom amount of blocks in the config.
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pub async fn median_long_term_weight(&self) -> usize {
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let mut sorted_long_term_weights: Vec<usize> = self.long_term_weights.clone().into();
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// Move this out of the async runtime as this can take a bit.
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let sorted_long_term_weights = rayon_spawn_async(|| {
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sorted_long_term_weights.par_sort_unstable();
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sorted_long_term_weights
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})
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.await;
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median(&sorted_long_term_weights)
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pub fn median_long_term_weight(&self) -> usize {
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median(&self.cached_sorted_long_term_weights)
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}
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pub fn median_short_term_weight(&self) -> usize {
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let mut sorted_short_term_block_weights: Vec<usize> =
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self.short_term_block_weights.clone().into();
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sorted_short_term_block_weights.sort_unstable();
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median(&sorted_short_term_block_weights)
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median(&self.cached_sorted_short_term_weights)
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}
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/// Returns the effective median weight, used for block reward calculations and to calculate
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/// the block weight limit.
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///
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/// See: https://cuprate.github.io/monero-book/consensus_rules/blocks/weight_limit.html#calculating-effective-median-weight
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pub async fn effective_median_block_weight(&self, hf: &HardFork) -> usize {
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pub fn effective_median_block_weight(&self, hf: &HardFork) -> usize {
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calculate_effective_median_block_weight(
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hf,
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self.median_short_term_weight(),
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self.median_long_term_weight().await,
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self.median_long_term_weight(),
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)
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}
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/// Returns the median weight used to calculate block reward punishment.
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///
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/// https://cuprate.github.io/monero-book/consensus_rules/blocks/reward.html#calculating-block-reward
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pub async fn median_for_block_reward(&self, hf: &HardFork) -> usize {
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pub fn median_for_block_reward(&self, hf: &HardFork) -> usize {
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if hf.in_range(&HardFork::V1, &HardFork::V12) {
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self.median_short_term_weight()
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} else {
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self.effective_median_block_weight(hf).await
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self.effective_median_block_weight(hf)
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}
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.max(penalty_free_zone(hf))
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}
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