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Refactor packet deduplication and harden bench test (solana-labs#22080)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,63 @@ | ||
| use { | ||
| crate::{banking_stage::BankingStageStats, packet_hasher::PacketHasher}, | ||
| lru::LruCache, | ||
| solana_measure::measure::Measure, | ||
| solana_perf::packet::PacketBatch, | ||
| std::{ | ||
| ops::DerefMut, | ||
| sync::{atomic::Ordering, Arc, Mutex}, | ||
| }, | ||
| }; | ||
|
|
||
| const DEFAULT_LRU_SIZE: usize = 200_000; | ||
|
|
||
| #[derive(Clone)] | ||
| pub struct PacketDeduper(Arc<Mutex<(LruCache<u64, ()>, PacketHasher)>>); | ||
|
|
||
| impl Default for PacketDeduper { | ||
| fn default() -> Self { | ||
| Self(Arc::new(Mutex::new(( | ||
| LruCache::new(DEFAULT_LRU_SIZE), | ||
| PacketHasher::default(), | ||
| )))) | ||
| } | ||
| } | ||
|
|
||
| impl PacketDeduper { | ||
| pub fn dedupe_packets( | ||
| &self, | ||
| packet_batch: &PacketBatch, | ||
| packet_indexes: &mut Vec<usize>, | ||
| banking_stage_stats: &BankingStageStats, | ||
| ) { | ||
| let original_packets_count = packet_indexes.len(); | ||
| let mut packet_duplicate_check_time = Measure::start("packet_duplicate_check"); | ||
| let mut duplicates = self.0.lock().unwrap(); | ||
| let (cache, hasher) = duplicates.deref_mut(); | ||
| packet_indexes.retain(|i| { | ||
| let packet_hash = hasher.hash_packet(&packet_batch.packets[*i]); | ||
| match cache.get_mut(&packet_hash) { | ||
| Some(_hash) => false, | ||
| None => { | ||
| cache.put(packet_hash, ()); | ||
| true | ||
| } | ||
| } | ||
| }); | ||
| packet_duplicate_check_time.stop(); | ||
| banking_stage_stats | ||
| .packet_duplicate_check_elapsed | ||
| .fetch_add(packet_duplicate_check_time.as_us(), Ordering::Relaxed); | ||
| banking_stage_stats | ||
| .dropped_duplicated_packets_count | ||
| .fetch_add( | ||
| original_packets_count.saturating_sub(packet_indexes.len()), | ||
| Ordering::Relaxed, | ||
| ); | ||
| } | ||
|
|
||
| pub fn reset(&self) { | ||
| let mut duplicates = self.0.lock().unwrap(); | ||
| duplicates.0.clear(); | ||
| } | ||
| } |
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