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sigverify_stage.rs
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sigverify_stage.rs
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//! The `sigverify_stage` implements the signature verification stage of the TPU. It
//! receives a list of lists of packets and outputs the same list, but tags each
//! top-level list with a list of booleans, telling the next stage whether the
//! signature in that packet is valid. It assumes each packet contains one
//! transaction. All processing is done on the CPU by default and on a GPU
//! if perf-libs are available
use {
crate::sigverify,
crossbeam_channel::{Receiver, RecvTimeoutError, SendError, Sender},
solana_measure::measure::Measure,
solana_perf::packet::PacketBatch,
solana_sdk::timing,
solana_streamer::streamer::{self, PacketBatchReceiver, StreamerError},
std::{
collections::{HashMap, VecDeque},
thread::{self, Builder, JoinHandle},
time::Instant,
},
thiserror::Error,
};
const MAX_SIGVERIFY_BATCH: usize = 10_000;
#[derive(Error, Debug)]
pub enum SigVerifyServiceError {
#[error("send packets batch error")]
Send(#[from] SendError<Vec<PacketBatch>>),
#[error("streamer error")]
Streamer(#[from] StreamerError),
}
type Result<T> = std::result::Result<T, SigVerifyServiceError>;
pub struct SigVerifyStage {
thread_hdl: JoinHandle<()>,
}
pub trait SigVerifier {
fn verify_batches(&self, batches: Vec<PacketBatch>) -> Vec<PacketBatch>;
}
#[derive(Default, Clone)]
pub struct DisabledSigVerifier {}
#[derive(Default)]
struct SigVerifierStats {
recv_batches_us_hist: histogram::Histogram, // time to call recv_batch
verify_batches_pp_us_hist: histogram::Histogram, // per-packet time to call verify_batch
batches_hist: histogram::Histogram, // number of packet batches per verify call
packets_hist: histogram::Histogram, // number of packets per verify call
total_batches: usize,
total_packets: usize,
}
impl SigVerifierStats {
fn report(&self) {
datapoint_info!(
"sigverify_stage-total_verify_time",
(
"recv_batches_us_90pct",
self.recv_batches_us_hist.percentile(90.0).unwrap_or(0),
i64
),
(
"recv_batches_us_min",
self.recv_batches_us_hist.minimum().unwrap_or(0),
i64
),
(
"recv_batches_us_max",
self.recv_batches_us_hist.maximum().unwrap_or(0),
i64
),
(
"recv_batches_us_mean",
self.recv_batches_us_hist.mean().unwrap_or(0),
i64
),
(
"verify_batches_pp_us_90pct",
self.verify_batches_pp_us_hist.percentile(90.0).unwrap_or(0),
i64
),
(
"verify_batches_pp_us_min",
self.verify_batches_pp_us_hist.minimum().unwrap_or(0),
i64
),
(
"verify_batches_pp_us_max",
self.verify_batches_pp_us_hist.maximum().unwrap_or(0),
i64
),
(
"verify_batches_pp_us_mean",
self.verify_batches_pp_us_hist.mean().unwrap_or(0),
i64
),
(
"batches_90pct",
self.batches_hist.percentile(90.0).unwrap_or(0),
i64
),
("batches_min", self.batches_hist.minimum().unwrap_or(0), i64),
("batches_max", self.batches_hist.maximum().unwrap_or(0), i64),
("batches_mean", self.batches_hist.mean().unwrap_or(0), i64),
(
"packets_90pct",
self.packets_hist.percentile(90.0).unwrap_or(0),
i64
),
("packets_min", self.packets_hist.minimum().unwrap_or(0), i64),
("packets_max", self.packets_hist.maximum().unwrap_or(0), i64),
("packets_mean", self.packets_hist.mean().unwrap_or(0), i64),
("total_batches", self.total_batches, i64),
("total_packets", self.total_packets, i64),
);
}
}
impl SigVerifier for DisabledSigVerifier {
fn verify_batches(&self, mut batches: Vec<PacketBatch>) -> Vec<PacketBatch> {
sigverify::ed25519_verify_disabled(&mut batches);
batches
}
}
impl SigVerifyStage {
#[allow(clippy::new_ret_no_self)]
pub fn new<T: SigVerifier + 'static + Send + Clone>(
packet_receiver: Receiver<PacketBatch>,
verified_sender: Sender<Vec<PacketBatch>>,
verifier: T,
) -> Self {
let thread_hdl = Self::verifier_services(packet_receiver, verified_sender, verifier);
Self { thread_hdl }
}
pub fn discard_excess_packets(batches: &mut Vec<PacketBatch>, max_packets: usize) {
let mut received_ips = HashMap::new();
for (batch_index, batch) in batches.iter().enumerate() {
for (packet_index, packets) in batch.packets.iter().enumerate() {
let e = received_ips
.entry(packets.meta.addr().ip())
.or_insert_with(VecDeque::new);
e.push_back((batch_index, packet_index));
}
}
let mut batch_len = 0;
while batch_len < max_packets {
for (_ip, indexes) in received_ips.iter_mut() {
if !indexes.is_empty() {
indexes.pop_front();
batch_len += 1;
if batch_len >= MAX_SIGVERIFY_BATCH {
break;
}
}
}
}
for (_addr, indexes) in received_ips {
for (batch_index, packet_index) in indexes {
batches[batch_index].packets[packet_index]
.meta
.set_discard(true);
}
}
}
fn verifier<T: SigVerifier>(
recvr: &PacketBatchReceiver,
sendr: &Sender<Vec<PacketBatch>>,
verifier: &T,
stats: &mut SigVerifierStats,
) -> Result<()> {
let (mut batches, num_packets, recv_duration) = streamer::recv_packet_batches(recvr)?;
let batches_len = batches.len();
debug!(
"@{:?} verifier: verifying: {}",
timing::timestamp(),
num_packets,
);
if num_packets > MAX_SIGVERIFY_BATCH {
Self::discard_excess_packets(&mut batches, MAX_SIGVERIFY_BATCH);
}
let mut verify_batch_time = Measure::start("sigverify_batch_time");
sendr.send(verifier.verify_batches(batches))?;
verify_batch_time.stop();
debug!(
"@{:?} verifier: done. batches: {} total verify time: {:?} verified: {} v/s {}",
timing::timestamp(),
batches_len,
verify_batch_time.as_ms(),
num_packets,
(num_packets as f32 / verify_batch_time.as_s())
);
stats
.recv_batches_us_hist
.increment(recv_duration.as_micros() as u64)
.unwrap();
stats
.verify_batches_pp_us_hist
.increment(verify_batch_time.as_us() / (num_packets as u64))
.unwrap();
stats.batches_hist.increment(batches_len as u64).unwrap();
stats.packets_hist.increment(num_packets as u64).unwrap();
stats.total_batches += batches_len;
stats.total_packets += num_packets;
Ok(())
}
fn verifier_service<T: SigVerifier + 'static + Send + Clone>(
packet_receiver: PacketBatchReceiver,
verified_sender: Sender<Vec<PacketBatch>>,
verifier: &T,
) -> JoinHandle<()> {
let verifier = verifier.clone();
let mut stats = SigVerifierStats::default();
let mut last_print = Instant::now();
Builder::new()
.name("solana-verifier".to_string())
.spawn(move || loop {
if let Err(e) =
Self::verifier(&packet_receiver, &verified_sender, &verifier, &mut stats)
{
match e {
SigVerifyServiceError::Streamer(StreamerError::RecvTimeout(
RecvTimeoutError::Disconnected,
)) => break,
SigVerifyServiceError::Streamer(StreamerError::RecvTimeout(
RecvTimeoutError::Timeout,
)) => (),
SigVerifyServiceError::Send(_) => {
break;
}
_ => error!("{:?}", e),
}
}
if last_print.elapsed().as_secs() > 2 {
stats.report();
stats = SigVerifierStats::default();
last_print = Instant::now();
}
})
.unwrap()
}
fn verifier_services<T: SigVerifier + 'static + Send + Clone>(
packet_receiver: PacketBatchReceiver,
verified_sender: Sender<Vec<PacketBatch>>,
verifier: T,
) -> JoinHandle<()> {
Self::verifier_service(packet_receiver, verified_sender, &verifier)
}
pub fn join(self) -> thread::Result<()> {
self.thread_hdl.join()
}
}
#[cfg(test)]
mod tests {
use {super::*, solana_perf::packet::Packet};
fn count_non_discard(packet_batches: &[PacketBatch]) -> usize {
packet_batches
.iter()
.map(|batch| {
batch
.packets
.iter()
.map(|p| if p.meta.discard() { 0 } else { 1 })
.sum::<usize>()
})
.sum::<usize>()
}
#[test]
fn test_packet_discard() {
solana_logger::setup();
let mut batch = PacketBatch::default();
batch.packets.resize(10, Packet::default());
batch.packets[3].meta.addr = std::net::IpAddr::from([1u16; 8]);
let mut batches = vec![batch];
let max = 3;
SigVerifyStage::discard_excess_packets(&mut batches, max);
assert_eq!(count_non_discard(&batches), max);
assert!(!batches[0].packets[0].meta.discard());
assert!(!batches[0].packets[3].meta.discard());
}
}