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use crate::{cluster_info::ClusterInfo, cluster_slots::ClusterSlots};
use solana_ledger::blockstore::{Blockstore, CompletedSlotsReceiver};
use solana_measure::measure::Measure;
use solana_runtime::bank_forks::BankForks;
use solana_sdk::{clock::Slot, pubkey::Pubkey};
use std::{
sync::{
atomic::{AtomicBool, Ordering},
{Arc, RwLock},
},
thread::sleep,
thread::{self, Builder, JoinHandle},
time::{Duration, Instant},
};
#[derive(Default, Debug)]
struct ClusterSlotsServiceTiming {
pub lowest_slot_elapsed: u64,
pub update_completed_slots_elapsed: u64,
}
impl ClusterSlotsServiceTiming {
fn update(&mut self, lowest_slot_elapsed: u64, update_completed_slots_elapsed: u64) {
self.lowest_slot_elapsed += lowest_slot_elapsed;
self.update_completed_slots_elapsed += update_completed_slots_elapsed;
}
}
pub struct ClusterSlotsService {
t_cluster_slots_service: JoinHandle<()>,
}
impl ClusterSlotsService {
pub fn new(
blockstore: Arc<Blockstore>,
cluster_slots: Arc<ClusterSlots>,
bank_forks: Arc<RwLock<BankForks>>,
cluster_info: Arc<ClusterInfo>,
completed_slots_receiver: CompletedSlotsReceiver,
exit: Arc<AtomicBool>,
) -> Self {
let id = cluster_info.id();
Self::initialize_lowest_slot(id, &blockstore, &cluster_info);
Self::initialize_epoch_slots(&blockstore, &cluster_info, &completed_slots_receiver);
let t_cluster_slots_service = Builder::new()
.name("solana-cluster-slots-service".to_string())
.spawn(move || {
Self::run(
blockstore,
cluster_slots,
bank_forks,
cluster_info,
completed_slots_receiver,
exit,
)
})
.unwrap();
ClusterSlotsService {
t_cluster_slots_service,
}
}
pub fn join(self) -> thread::Result<()> {
self.t_cluster_slots_service.join()
}
fn run(
blockstore: Arc<Blockstore>,
cluster_slots: Arc<ClusterSlots>,
bank_forks: Arc<RwLock<BankForks>>,
cluster_info: Arc<ClusterInfo>,
completed_slots_receiver: CompletedSlotsReceiver,
exit: Arc<AtomicBool>,
) {
let mut cluster_slots_service_timing = ClusterSlotsServiceTiming::default();
let mut last_stats = Instant::now();
loop {
if exit.load(Ordering::Relaxed) {
break;
}
let new_root = bank_forks.read().unwrap().root();
let id = cluster_info.id();
let mut lowest_slot_elapsed = Measure::start("lowest_slot_elapsed");
let lowest_slot = blockstore.lowest_slot();
Self::update_lowest_slot(&id, lowest_slot, &cluster_info);
lowest_slot_elapsed.stop();
let mut update_completed_slots_elapsed =
Measure::start("update_completed_slots_elapsed");
Self::update_completed_slots(&completed_slots_receiver, &cluster_info);
cluster_slots.update(new_root, &cluster_info, &bank_forks);
update_completed_slots_elapsed.stop();
cluster_slots_service_timing.update(
lowest_slot_elapsed.as_us(),
update_completed_slots_elapsed.as_us(),
);
if last_stats.elapsed().as_secs() > 2 {
datapoint_info!(
"cluster_slots_service-timing",
(
"lowest_slot_elapsed",
cluster_slots_service_timing.lowest_slot_elapsed,
i64
),
(
"update_completed_slots_elapsed",
cluster_slots_service_timing.update_completed_slots_elapsed,
i64
),
);
cluster_slots_service_timing = ClusterSlotsServiceTiming::default();
last_stats = Instant::now();
}
sleep(Duration::from_millis(200));
}
}
fn update_completed_slots(
completed_slots_receiver: &CompletedSlotsReceiver,
cluster_info: &ClusterInfo,
) {
let mut slots: Vec<Slot> = vec![];
while let Ok(mut more) = completed_slots_receiver.try_recv() {
slots.append(&mut more);
}
#[allow(clippy::stable_sort_primitive)]
slots.sort();
if !slots.is_empty() {
cluster_info.push_epoch_slots(&slots);
}
}
fn initialize_lowest_slot(id: Pubkey, blockstore: &Blockstore, cluster_info: &ClusterInfo) {
cluster_info.push_lowest_slot(id, blockstore.lowest_slot());
}
fn update_lowest_slot(id: &Pubkey, lowest_slot: Slot, cluster_info: &ClusterInfo) {
cluster_info.push_lowest_slot(*id, lowest_slot);
}
fn initialize_epoch_slots(
blockstore: &Blockstore,
cluster_info: &ClusterInfo,
completed_slots_receiver: &CompletedSlotsReceiver,
) {
let root = blockstore.last_root();
let mut slots: Vec<_> = blockstore
.live_slots_iterator(root)
.filter_map(|(slot, slot_meta)| {
if slot_meta.is_full() {
Some(slot)
} else {
None
}
})
.collect();
while let Ok(mut more) = completed_slots_receiver.try_recv() {
slots.append(&mut more);
}
slots.sort_unstable();
slots.dedup();
if !slots.is_empty() {
cluster_info.push_epoch_slots(&slots);
}
}
}
#[cfg(test)]
mod test {
use super::*;
use crate::cluster_info::Node;
#[test]
pub fn test_update_lowest_slot() {
let node_info = Node::new_localhost_with_pubkey(&Pubkey::default());
let cluster_info = ClusterInfo::new_with_invalid_keypair(node_info.info);
ClusterSlotsService::update_lowest_slot(&Pubkey::default(), 5, &cluster_info);
cluster_info.flush_push_queue();
let lowest = cluster_info
.get_lowest_slot_for_node(&Pubkey::default(), None, |lowest_slot, _| {
lowest_slot.clone()
})
.unwrap();
assert_eq!(lowest.lowest, 5);
}
}