383 lines
12 KiB
Rust
383 lines
12 KiB
Rust
//! The `shred_fetch_stage` pulls shreds from UDP sockets and sends it to a channel.
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use crate::packet_hasher::PacketHasher;
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use lru::LruCache;
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use solana_ledger::shred::{get_shred_slot_index_type, ShredFetchStats};
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use solana_perf::cuda_runtime::PinnedVec;
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use solana_perf::packet::{Packet, PacketsRecycler};
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use solana_perf::recycler::Recycler;
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use solana_runtime::bank_forks::BankForks;
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use solana_sdk::clock::{Slot, DEFAULT_MS_PER_SLOT};
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use solana_streamer::streamer::{self, PacketReceiver, PacketSender};
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use std::net::UdpSocket;
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use std::sync::atomic::AtomicBool;
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use std::sync::mpsc::channel;
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use std::sync::Arc;
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use std::sync::RwLock;
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use std::thread::{self, Builder, JoinHandle};
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use std::time::Instant;
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const DEFAULT_LRU_SIZE: usize = 10_000;
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pub type ShredsReceived = LruCache<u64, ()>;
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pub struct ShredFetchStage {
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thread_hdls: Vec<JoinHandle<()>>,
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}
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impl ShredFetchStage {
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fn process_packet<F>(
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p: &mut Packet,
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shreds_received: &mut ShredsReceived,
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stats: &mut ShredFetchStats,
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last_root: Slot,
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last_slot: Slot,
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slots_per_epoch: u64,
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modify: &F,
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packet_hasher: &PacketHasher,
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) where
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F: Fn(&mut Packet),
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{
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p.meta.discard = true;
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if let Some((slot, _index, _shred_type)) = get_shred_slot_index_type(p, stats) {
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// Seems reasonable to limit shreds to 2 epochs away
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if slot > last_root && slot < (last_slot + 2 * slots_per_epoch) {
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// Shred filter
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let hash = packet_hasher.hash_packet(p);
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if shreds_received.get(&hash).is_none() {
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shreds_received.put(hash, ());
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p.meta.discard = false;
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modify(p);
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} else {
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stats.duplicate_shred += 1;
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}
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} else {
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stats.slot_out_of_range += 1;
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}
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}
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}
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// updates packets received on a channel and sends them on another channel
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fn modify_packets<F>(
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recvr: PacketReceiver,
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sendr: PacketSender,
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bank_forks: Option<Arc<RwLock<BankForks>>>,
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name: &'static str,
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modify: F,
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) where
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F: Fn(&mut Packet),
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{
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let mut shreds_received = LruCache::new(DEFAULT_LRU_SIZE);
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let mut last_updated = Instant::now();
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// In the case of bank_forks=None, setup to accept any slot range
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let mut last_root = 0;
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let mut last_slot = std::u64::MAX;
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let mut slots_per_epoch = 0;
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let mut last_stats = Instant::now();
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let mut stats = ShredFetchStats::default();
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let mut packet_hasher = PacketHasher::default();
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while let Some(mut p) = recvr.iter().next() {
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if last_updated.elapsed().as_millis() as u64 > DEFAULT_MS_PER_SLOT {
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last_updated = Instant::now();
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packet_hasher.reset();
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shreds_received.clear();
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if let Some(bank_forks) = bank_forks.as_ref() {
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let bank_forks_r = bank_forks.read().unwrap();
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last_root = bank_forks_r.root();
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let working_bank = bank_forks_r.working_bank();
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last_slot = working_bank.slot();
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let root_bank = bank_forks_r.root_bank();
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slots_per_epoch = root_bank.get_slots_in_epoch(root_bank.epoch());
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}
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}
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stats.shred_count += p.packets.len();
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p.packets.iter_mut().for_each(|mut packet| {
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Self::process_packet(
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&mut packet,
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&mut shreds_received,
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&mut stats,
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last_root,
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last_slot,
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slots_per_epoch,
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&modify,
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&packet_hasher,
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);
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});
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if last_stats.elapsed().as_millis() > 1000 {
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datapoint_info!(
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name,
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("index_overrun", stats.index_overrun, i64),
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("shred_count", stats.shred_count, i64),
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("slot_bad_deserialize", stats.slot_bad_deserialize, i64),
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("index_bad_deserialize", stats.index_bad_deserialize, i64),
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("index_out_of_bounds", stats.index_out_of_bounds, i64),
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("slot_out_of_range", stats.slot_out_of_range, i64),
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("duplicate_shred", stats.duplicate_shred, i64),
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);
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stats = ShredFetchStats::default();
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last_stats = Instant::now();
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}
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if sendr.send(p).is_err() {
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break;
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}
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}
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}
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fn packet_modifier<F>(
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sockets: Vec<Arc<UdpSocket>>,
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exit: &Arc<AtomicBool>,
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sender: PacketSender,
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recycler: Recycler<PinnedVec<Packet>>,
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bank_forks: Option<Arc<RwLock<BankForks>>>,
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name: &'static str,
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modify: F,
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) -> (Vec<JoinHandle<()>>, JoinHandle<()>)
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where
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F: Fn(&mut Packet) + Send + 'static,
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{
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let (packet_sender, packet_receiver) = channel();
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let streamers = sockets
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.into_iter()
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.map(|s| {
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streamer::receiver(
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s,
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exit,
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packet_sender.clone(),
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recycler.clone(),
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"packet_modifier",
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1,
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true,
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)
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})
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.collect();
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let modifier_hdl = Builder::new()
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.name("solana-tvu-fetch-stage-packet-modifier".to_string())
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.spawn(move || Self::modify_packets(packet_receiver, sender, bank_forks, name, modify))
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.unwrap();
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(streamers, modifier_hdl)
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}
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pub fn new(
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sockets: Vec<Arc<UdpSocket>>,
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forward_sockets: Vec<Arc<UdpSocket>>,
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repair_socket: Arc<UdpSocket>,
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sender: &PacketSender,
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bank_forks: Option<Arc<RwLock<BankForks>>>,
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exit: &Arc<AtomicBool>,
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) -> Self {
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let recycler: PacketsRecycler = Recycler::warmed(100, 1024);
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let (mut tvu_threads, tvu_filter) = Self::packet_modifier(
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sockets,
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exit,
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sender.clone(),
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recycler.clone(),
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bank_forks.clone(),
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"shred_fetch",
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|_| {},
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);
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let (tvu_forwards_threads, fwd_thread_hdl) = Self::packet_modifier(
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forward_sockets,
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exit,
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sender.clone(),
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recycler.clone(),
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bank_forks.clone(),
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"shred_fetch_tvu_forwards",
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|p| p.meta.forward = true,
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);
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let (repair_receiver, repair_handler) = Self::packet_modifier(
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vec![repair_socket],
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exit,
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sender.clone(),
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recycler,
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bank_forks,
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"shred_fetch_repair",
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|p| p.meta.repair = true,
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);
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tvu_threads.extend(tvu_forwards_threads.into_iter());
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tvu_threads.extend(repair_receiver.into_iter());
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tvu_threads.push(tvu_filter);
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tvu_threads.push(fwd_thread_hdl);
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tvu_threads.push(repair_handler);
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Self {
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thread_hdls: tvu_threads,
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}
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}
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pub fn join(self) -> thread::Result<()> {
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for thread_hdl in self.thread_hdls {
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thread_hdl.join()?;
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}
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Ok(())
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use solana_ledger::blockstore::MAX_DATA_SHREDS_PER_SLOT;
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use solana_ledger::shred::Shred;
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#[test]
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fn test_data_code_same_index() {
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solana_logger::setup();
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let mut shreds_received = LruCache::new(DEFAULT_LRU_SIZE);
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let mut packet = Packet::default();
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let mut stats = ShredFetchStats::default();
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let slot = 1;
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let shred = Shred::new_from_data(
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slot, 3, // shred index
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0, // parent offset
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None, // data
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true, // is_last_in_fec_set
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true, // is_last_in_slot
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0, // reference_tick
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0, // version
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3, // fec_set_index
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);
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shred.copy_to_packet(&mut packet);
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let hasher = PacketHasher::default();
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let last_root = 0;
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let last_slot = 100;
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let slots_per_epoch = 10;
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ShredFetchStage::process_packet(
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&mut packet,
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&mut shreds_received,
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&mut stats,
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last_root,
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last_slot,
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slots_per_epoch,
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&|_p| {},
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&hasher,
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);
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assert!(!packet.meta.discard);
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let coding = solana_ledger::shred::Shredder::generate_coding_shreds(
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&[shred],
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false, // is_last_in_slot
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);
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coding[0].copy_to_packet(&mut packet);
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ShredFetchStage::process_packet(
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&mut packet,
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&mut shreds_received,
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&mut stats,
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last_root,
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last_slot,
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slots_per_epoch,
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&|_p| {},
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&hasher,
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);
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assert!(!packet.meta.discard);
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}
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#[test]
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fn test_shred_filter() {
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solana_logger::setup();
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let mut shreds_received = LruCache::new(DEFAULT_LRU_SIZE);
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let mut packet = Packet::default();
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let mut stats = ShredFetchStats::default();
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let last_root = 0;
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let last_slot = 100;
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let slots_per_epoch = 10;
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let hasher = PacketHasher::default();
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// packet size is 0, so cannot get index
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ShredFetchStage::process_packet(
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&mut packet,
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&mut shreds_received,
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&mut stats,
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last_root,
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last_slot,
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slots_per_epoch,
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&|_p| {},
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&hasher,
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);
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assert_eq!(stats.index_overrun, 1);
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assert!(packet.meta.discard);
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let shred = Shred::new_from_data(1, 3, 0, None, true, true, 0, 0, 0);
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shred.copy_to_packet(&mut packet);
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// rejected slot is 1, root is 3
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ShredFetchStage::process_packet(
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&mut packet,
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&mut shreds_received,
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&mut stats,
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3,
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last_slot,
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slots_per_epoch,
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&|_p| {},
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&hasher,
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);
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assert!(packet.meta.discard);
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// Accepted for 1,3
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ShredFetchStage::process_packet(
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&mut packet,
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&mut shreds_received,
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&mut stats,
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last_root,
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last_slot,
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slots_per_epoch,
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&|_p| {},
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&hasher,
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);
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assert!(!packet.meta.discard);
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// shreds_received should filter duplicate
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ShredFetchStage::process_packet(
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&mut packet,
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&mut shreds_received,
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&mut stats,
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last_root,
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last_slot,
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slots_per_epoch,
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&|_p| {},
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&hasher,
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);
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assert!(packet.meta.discard);
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let shred = Shred::new_from_data(1_000_000, 3, 0, None, true, true, 0, 0, 0);
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shred.copy_to_packet(&mut packet);
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// Slot 1 million is too high
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ShredFetchStage::process_packet(
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&mut packet,
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&mut shreds_received,
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&mut stats,
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last_root,
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last_slot,
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slots_per_epoch,
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&|_p| {},
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&hasher,
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);
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assert!(packet.meta.discard);
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let index = MAX_DATA_SHREDS_PER_SLOT as u32;
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let shred = Shred::new_from_data(5, index, 0, None, true, true, 0, 0, 0);
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shred.copy_to_packet(&mut packet);
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ShredFetchStage::process_packet(
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&mut packet,
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&mut shreds_received,
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&mut stats,
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last_root,
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last_slot,
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slots_per_epoch,
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&|_p| {},
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&hasher,
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);
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assert!(packet.meta.discard);
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}
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}
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