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verify_mgr.rs
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verify_mgr.rs
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extern crate num_cpus;
use crate::component::verify_queue::VerifyQueue;
use crate::service::TxPoolService;
use ckb_logger::{debug, info};
use ckb_script::ChunkCommand;
use ckb_stop_handler::CancellationToken;
use std::sync::Arc;
use tokio::sync::{watch, RwLock};
use tokio::task::JoinHandle;
#[derive(Clone, Debug, PartialEq)]
enum WorkerRole {
OnlySmallCycleTx,
SubmitTimeFirst,
}
struct Worker {
tasks: Arc<RwLock<VerifyQueue>>,
command_rx: watch::Receiver<ChunkCommand>,
service: TxPoolService,
exit_signal: CancellationToken,
status: ChunkCommand,
role: WorkerRole,
}
impl Clone for Worker {
fn clone(&self) -> Self {
Self {
tasks: Arc::clone(&self.tasks),
command_rx: self.command_rx.clone(),
exit_signal: self.exit_signal.clone(),
service: self.service.clone(),
status: self.status.clone(),
role: self.role.clone(),
}
}
}
impl Worker {
pub fn new(
service: TxPoolService,
tasks: Arc<RwLock<VerifyQueue>>,
command_rx: watch::Receiver<ChunkCommand>,
exit_signal: CancellationToken,
role: WorkerRole,
) -> Self {
Worker {
service,
tasks,
command_rx,
exit_signal,
status: ChunkCommand::Resume,
role,
}
}
pub fn start(mut self) -> JoinHandle<()> {
tokio::spawn(async move {
let queue_ready = self.tasks.read().await.subscribe();
loop {
tokio::select! {
_ = self.exit_signal.cancelled() => {
break;
}
_ = self.command_rx.changed() => {
self.status = self.command_rx.borrow().to_owned();
self.process_inner().await;
}
_ = queue_ready.notified() => {
self.process_inner().await;
}
};
}
})
}
async fn process_inner(&mut self) {
loop {
if self.exit_signal.is_cancelled() {
info!("Verify worker::process_inner exit_signal is cancelled");
return;
}
if self.status != ChunkCommand::Resume {
return;
}
// cheap query to check queue is not empty
if self.tasks.read().await.is_empty() {
return;
}
// pick a entry to run verify
let entry = {
let mut tasks = self.tasks.write().await;
match tasks.pop_front(self.role == WorkerRole::OnlySmallCycleTx) {
Some(entry) => entry,
None => {
if !tasks.is_empty() {
tasks.re_notify();
debug!(
"Worker (role: {:?}) didn't got tx after pop_front, but tasks is not empty, notify other Workers now",
self.role
);
}
return;
}
}
};
if let Some((res, snapshot)) = self
.service
._process_tx(
entry.tx.clone(),
entry.remote.map(|e| e.0),
Some(&mut self.command_rx),
)
.await
{
self.service
.after_process(entry.tx, entry.remote, &snapshot, &res)
.await;
} else {
info!("_process_tx for tx: {} returned none", entry.tx.hash());
}
}
}
}
pub(crate) struct VerifyMgr {
workers: Vec<(watch::Sender<ChunkCommand>, Worker)>,
join_handles: Option<Vec<JoinHandle<()>>>,
signal_exit: CancellationToken,
command_rx: watch::Receiver<ChunkCommand>,
}
impl VerifyMgr {
pub fn new(
service: TxPoolService,
command_rx: watch::Receiver<ChunkCommand>,
signal_exit: CancellationToken,
) -> Self {
// `num_cpus::get()` will always return at least 1,
// don't use too many cpu cores to avoid high workload on the system
let worker_num = std::cmp::max(num_cpus::get() * 3 / 4, 1);
let workers: Vec<_> = (0..worker_num)
.map({
let tasks = Arc::clone(&service.verify_queue);
let signal_exit = signal_exit.clone();
move |idx| {
let role = if idx == 0 && worker_num > 1 {
WorkerRole::OnlySmallCycleTx
} else {
WorkerRole::SubmitTimeFirst
};
let (child_tx, child_rx) = watch::channel(ChunkCommand::Resume);
(
child_tx,
Worker::new(
service.clone(),
Arc::clone(&tasks),
child_rx,
signal_exit.clone(),
role,
),
)
}
})
.collect();
Self {
workers,
join_handles: None,
signal_exit,
command_rx,
}
}
fn send_child_command(&self, command: ChunkCommand) {
for w in &self.workers {
if let Err(err) = w.0.send(command.clone()) {
info!("send worker command failed, error: {}", err);
}
}
}
async fn start_loop(&mut self) {
let mut join_handles = Vec::new();
for w in self.workers.iter_mut() {
let h = w.1.clone().start();
join_handles.push(h);
}
self.join_handles.replace(join_handles);
loop {
tokio::select! {
_ = self.signal_exit.cancelled() => {
info!("TxPool chunk_command service received exit signal, exit now");
self.send_child_command(ChunkCommand::Stop);
break;
},
_ = self.command_rx.changed() => {
let command = self.command_rx.borrow().to_owned();
self.send_child_command(command);
}
}
}
if let Some(jh) = self.join_handles.take() {
for h in jh {
h.await.expect("Worker thread panic");
}
}
info!("TxPool verify_mgr service exited");
}
pub async fn run(&mut self) {
self.start_loop().await;
}
}