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cache sorted long and short term block weights

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Boog900 2023-11-08 00:28:15 +00:00
parent 9471ca5d6a
commit f025513950
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GPG key ID: 5401367FB7302004
3 changed files with 84 additions and 36 deletions
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5
consensus/src/bin/scan_chain.rs
View file

@ -24,7 +24,7 @@ use monero_consensus::{
mod tx_pool;
const MAX_BLOCKS_IN_RANGE: u64 = 1000;
const MAX_BLOCKS_HEADERS_IN_RANGE: u64 = 250;
const MAX_BLOCKS_HEADERS_IN_RANGE: u64 = 500;
/// Calls for a batch of blocks, returning the response and the time it took.
async fn call_batch<D: Database>(
@ -229,13 +229,14 @@ async fn main() {
let rpc_config = RpcConfig::new(MAX_BLOCKS_IN_RANGE, MAX_BLOCKS_HEADERS_IN_RANGE);
let rpc_config = Arc::new(RwLock::new(rpc_config));
tracing::info!("Attempting to open cache at: {}", file_for_cache.display());
let cache = match ScanningCache::load(&file_for_cache) {
Ok(cache) => {
tracing::info!("Reloaded from cache, chain height: {}", cache.height);
Arc::new(RwLock::new(cache))
}
Err(_) => {
tracing::info!("Couldn't load from cache starting from scratch");
tracing::warn!("Couldn't load from cache starting from scratch");
let mut cache = ScanningCache::default();
let genesis = monero_consensus::genesis::generate_genesis_block(&network);

8
consensus/src/context.rs
View file

@ -297,12 +297,10 @@ impl Service<BlockChainContextRequest> for BlockChainContextService {
next_difficulty: difficulty_cache.next_difficulty(&current_hf),
cumulative_difficulty: difficulty_cache.cumulative_difficulty(),
effective_median_weight: weight_cache
.effective_median_block_weight(&current_hf)
.await,
median_long_term_weight: weight_cache.median_long_term_weight().await,
.effective_median_block_weight(&current_hf),
median_long_term_weight: weight_cache.median_long_term_weight(),
median_weight_for_block_reward: weight_cache
.median_for_block_reward(&current_hf)
.await,
.median_for_block_reward(&current_hf),
already_generated_coins: *already_generated_coins,
top_block_timestamp: difficulty_cache.top_block_timestamp(),
median_block_timestamp: difficulty_cache.median_timestamp(

107
consensus/src/context/weight.rs
View file

@ -77,6 +77,14 @@ impl BlockWeightsCacheConfig {
pub struct BlockWeightsCache {
short_term_block_weights: VecDeque<usize>,
long_term_weights: VecDeque<usize>,
/// The short term block weights sorted so we don't have to sort them every time we need
/// the median.
cached_sorted_long_term_weights: Vec<usize>,
/// The long term block weights sorted so we don't have to sort them every time we need
/// the median.
cached_sorted_short_term_weights: Vec<usize>,
/// The height of the top block.
tip_height: u64,
@ -93,25 +101,37 @@ impl BlockWeightsCache {
) -> Result<Self, ConsensusError> {
tracing::info!("Initializing weight cache this may take a while.");
let long_term_weights: VecDeque<usize> = get_long_term_weight_in_range(
let long_term_weights = get_long_term_weight_in_range(
chain_height.saturating_sub(config.long_term_window)..chain_height,
database.clone(),
)
.await?
.into();
.await?;
let short_term_block_weights: VecDeque<usize> = get_blocks_weight_in_range(
let short_term_block_weights = get_blocks_weight_in_range(
chain_height.saturating_sub(config.short_term_window)..chain_height,
database,
)
.await?
.into();
.await?;
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());
let mut cloned_short_term_weights = short_term_block_weights.clone();
let mut cloned_long_term_weights = long_term_weights.clone();
Ok(BlockWeightsCache {
short_term_block_weights,
long_term_weights,
short_term_block_weights: short_term_block_weights.into(),
long_term_weights: long_term_weights.into(),
cached_sorted_long_term_weights: rayon_spawn_async(|| {
cloned_long_term_weights.par_sort_unstable();
cloned_long_term_weights
})
.await,
cached_sorted_short_term_weights: rayon_spawn_async(|| {
cloned_short_term_weights.par_sort_unstable();
cloned_short_term_weights
})
.await,
tip_height: chain_height - 1,
config,
})
@ -132,59 +152,88 @@ impl BlockWeightsCache {
);
self.long_term_weights.push_back(long_term_weight);
match self
.cached_sorted_long_term_weights
.binary_search(&long_term_weight)
{
Ok(idx) | Err(idx) => self
.cached_sorted_long_term_weights
.insert(idx, long_term_weight),
}
if u64::try_from(self.long_term_weights.len()).unwrap() > self.config.long_term_window {
self.long_term_weights.pop_front();
let val = self
.long_term_weights
.pop_front()
.expect("long term window can't be negative");
match self.cached_sorted_long_term_weights.binary_search(&val) {
Ok(idx) | Err(idx) => self.cached_sorted_long_term_weights.remove(idx),
};
}
self.short_term_block_weights.push_back(block_weight);
match self
.cached_sorted_short_term_weights
.binary_search(&long_term_weight)
{
Ok(idx) | Err(idx) => self
.cached_sorted_short_term_weights
.insert(idx, long_term_weight),
}
if u64::try_from(self.short_term_block_weights.len()).unwrap()
> self.config.short_term_window
{
self.short_term_block_weights.pop_front();
let val = self
.short_term_block_weights
.pop_front()
.expect("short term window can't be negative");
match self.cached_sorted_short_term_weights.binary_search(&val) {
Ok(idx) | Err(idx) => self.cached_sorted_short_term_weights.remove(idx),
};
}
debug_assert_eq!(
self.cached_sorted_long_term_weights.len(),
self.long_term_weights.len()
);
debug_assert_eq!(
self.cached_sorted_short_term_weights.len(),
self.short_term_block_weights.len()
);
}
/// Returns the median long term weight over the last [`LONG_TERM_WINDOW`] blocks, or custom amount of blocks in the config.
pub async fn median_long_term_weight(&self) -> usize {
let mut sorted_long_term_weights: Vec<usize> = self.long_term_weights.clone().into();
// Move this out of the async runtime as this can take a bit.
let sorted_long_term_weights = rayon_spawn_async(|| {
sorted_long_term_weights.par_sort_unstable();
sorted_long_term_weights
})
.await;
median(&sorted_long_term_weights)
pub fn median_long_term_weight(&self) -> usize {
median(&self.cached_sorted_long_term_weights)
}
pub fn median_short_term_weight(&self) -> usize {
let mut sorted_short_term_block_weights: Vec<usize> =
self.short_term_block_weights.clone().into();
sorted_short_term_block_weights.sort_unstable();
median(&sorted_short_term_block_weights)
median(&self.cached_sorted_short_term_weights)
}
/// Returns the effective median weight, used for block reward calculations and to calculate
/// the block weight limit.
///
/// See: https://cuprate.github.io/monero-book/consensus_rules/blocks/weight_limit.html#calculating-effective-median-weight
pub async fn effective_median_block_weight(&self, hf: &HardFork) -> usize {
pub fn effective_median_block_weight(&self, hf: &HardFork) -> usize {
calculate_effective_median_block_weight(
hf,
self.median_short_term_weight(),
self.median_long_term_weight().await,
self.median_long_term_weight(),
)
}
/// Returns the median weight used to calculate block reward punishment.
///
/// https://cuprate.github.io/monero-book/consensus_rules/blocks/reward.html#calculating-block-reward
pub async fn median_for_block_reward(&self, hf: &HardFork) -> usize {
pub fn median_for_block_reward(&self, hf: &HardFork) -> usize {
if hf.in_range(&HardFork::V1, &HardFork::V12) {
self.median_short_term_weight()
} else {
self.effective_median_block_weight(hf).await
self.effective_median_block_weight(hf)
}
.max(penalty_free_zone(hf))
}