2023-01-20 10:10:47 -08:00
|
|
|
use {
|
|
|
|
solana_poh::poh_recorder::{BankStart, PohRecorder},
|
|
|
|
solana_sdk::{
|
|
|
|
clock::{
|
|
|
|
DEFAULT_TICKS_PER_SLOT, FORWARD_TRANSACTIONS_TO_LEADER_AT_SLOT_OFFSET,
|
|
|
|
HOLD_TRANSACTIONS_SLOT_OFFSET,
|
|
|
|
},
|
|
|
|
pubkey::Pubkey,
|
|
|
|
},
|
2023-02-01 09:18:40 -08:00
|
|
|
std::sync::{Arc, RwLock},
|
2023-01-20 10:10:47 -08:00
|
|
|
};
|
|
|
|
|
|
|
|
#[derive(Debug, Clone)]
|
|
|
|
pub enum BufferedPacketsDecision {
|
|
|
|
Consume(BankStart),
|
|
|
|
Forward,
|
|
|
|
ForwardAndHold,
|
|
|
|
Hold,
|
|
|
|
}
|
|
|
|
|
2023-03-15 19:39:48 -07:00
|
|
|
impl BufferedPacketsDecision {
|
|
|
|
/// Returns the `BankStart` if the decision is `Consume`. Otherwise, returns `None`.
|
|
|
|
pub fn bank_start(&self) -> Option<&BankStart> {
|
|
|
|
match self {
|
|
|
|
Self::Consume(bank_start) => Some(bank_start),
|
|
|
|
_ => None,
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2023-02-01 09:18:40 -08:00
|
|
|
pub struct DecisionMaker {
|
|
|
|
my_pubkey: Pubkey,
|
|
|
|
poh_recorder: Arc<RwLock<PohRecorder>>,
|
|
|
|
}
|
2023-01-20 10:10:47 -08:00
|
|
|
|
|
|
|
impl DecisionMaker {
|
2023-02-01 09:18:40 -08:00
|
|
|
pub fn new(my_pubkey: Pubkey, poh_recorder: Arc<RwLock<PohRecorder>>) -> Self {
|
|
|
|
Self {
|
|
|
|
my_pubkey,
|
|
|
|
poh_recorder,
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2023-03-15 19:39:48 -07:00
|
|
|
pub(crate) fn make_consume_or_forward_decision(&self) -> BufferedPacketsDecision {
|
2023-01-20 10:10:47 -08:00
|
|
|
let (leader_at_slot_offset, bank_start, would_be_leader, would_be_leader_shortly) = {
|
2023-02-01 09:18:40 -08:00
|
|
|
let poh = self.poh_recorder.read().unwrap();
|
2023-01-20 10:10:47 -08:00
|
|
|
let bank_start = poh
|
|
|
|
.bank_start()
|
|
|
|
.filter(|bank_start| bank_start.should_working_bank_still_be_processing_txs());
|
|
|
|
(
|
|
|
|
poh.leader_after_n_slots(FORWARD_TRANSACTIONS_TO_LEADER_AT_SLOT_OFFSET),
|
|
|
|
bank_start,
|
|
|
|
poh.would_be_leader(HOLD_TRANSACTIONS_SLOT_OFFSET * DEFAULT_TICKS_PER_SLOT),
|
|
|
|
poh.would_be_leader(
|
|
|
|
(FORWARD_TRANSACTIONS_TO_LEADER_AT_SLOT_OFFSET - 1) * DEFAULT_TICKS_PER_SLOT,
|
|
|
|
),
|
|
|
|
)
|
|
|
|
};
|
|
|
|
|
2023-03-15 19:39:48 -07:00
|
|
|
Self::consume_or_forward_packets(
|
|
|
|
&self.my_pubkey,
|
|
|
|
leader_at_slot_offset,
|
|
|
|
bank_start,
|
|
|
|
would_be_leader,
|
|
|
|
would_be_leader_shortly,
|
2023-01-20 10:10:47 -08:00
|
|
|
)
|
|
|
|
}
|
|
|
|
|
|
|
|
fn consume_or_forward_packets(
|
|
|
|
my_pubkey: &Pubkey,
|
|
|
|
leader_pubkey: Option<Pubkey>,
|
|
|
|
bank_start: Option<BankStart>,
|
|
|
|
would_be_leader: bool,
|
|
|
|
would_be_leader_shortly: bool,
|
|
|
|
) -> BufferedPacketsDecision {
|
|
|
|
// If has active bank, then immediately process buffered packets
|
|
|
|
// otherwise, based on leader schedule to either forward or hold packets
|
|
|
|
if let Some(bank_start) = bank_start {
|
|
|
|
// If the bank is available, this node is the leader
|
|
|
|
BufferedPacketsDecision::Consume(bank_start)
|
|
|
|
} else if would_be_leader_shortly {
|
|
|
|
// If the node will be the leader soon, hold the packets for now
|
|
|
|
BufferedPacketsDecision::Hold
|
|
|
|
} else if would_be_leader {
|
|
|
|
// Node will be leader within ~20 slots, hold the transactions in
|
|
|
|
// case it is the only node which produces an accepted slot.
|
|
|
|
BufferedPacketsDecision::ForwardAndHold
|
|
|
|
} else if let Some(x) = leader_pubkey {
|
|
|
|
if x != *my_pubkey {
|
|
|
|
// If the current node is not the leader, forward the buffered packets
|
|
|
|
BufferedPacketsDecision::Forward
|
|
|
|
} else {
|
|
|
|
// If the current node is the leader, return the buffered packets as is
|
|
|
|
BufferedPacketsDecision::Hold
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
// We don't know the leader. Hold the packets for now
|
|
|
|
BufferedPacketsDecision::Hold
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
#[cfg(test)]
|
|
|
|
mod tests {
|
|
|
|
use {
|
|
|
|
super::*,
|
|
|
|
solana_runtime::bank::Bank,
|
|
|
|
std::{sync::Arc, time::Instant},
|
|
|
|
};
|
|
|
|
|
2023-03-15 19:39:48 -07:00
|
|
|
#[test]
|
|
|
|
fn test_buffered_packet_decision_bank_start() {
|
|
|
|
let bank = Arc::new(Bank::default_for_tests());
|
|
|
|
let bank_start = BankStart {
|
|
|
|
working_bank: bank,
|
|
|
|
bank_creation_time: Arc::new(Instant::now()),
|
|
|
|
};
|
|
|
|
assert!(BufferedPacketsDecision::Consume(bank_start)
|
|
|
|
.bank_start()
|
|
|
|
.is_some());
|
|
|
|
assert!(BufferedPacketsDecision::Forward.bank_start().is_none());
|
|
|
|
assert!(BufferedPacketsDecision::ForwardAndHold
|
|
|
|
.bank_start()
|
|
|
|
.is_none());
|
|
|
|
assert!(BufferedPacketsDecision::Hold.bank_start().is_none());
|
|
|
|
}
|
|
|
|
|
2023-01-20 10:10:47 -08:00
|
|
|
#[test]
|
|
|
|
fn test_should_process_or_forward_packets() {
|
|
|
|
let my_pubkey = solana_sdk::pubkey::new_rand();
|
|
|
|
let my_pubkey1 = solana_sdk::pubkey::new_rand();
|
|
|
|
let bank = Arc::new(Bank::default_for_tests());
|
|
|
|
let bank_start = Some(BankStart {
|
|
|
|
working_bank: bank,
|
|
|
|
bank_creation_time: Arc::new(Instant::now()),
|
|
|
|
});
|
|
|
|
// having active bank allows to consume immediately
|
|
|
|
assert_matches!(
|
|
|
|
DecisionMaker::consume_or_forward_packets(
|
|
|
|
&my_pubkey,
|
|
|
|
None,
|
|
|
|
bank_start.clone(),
|
|
|
|
false,
|
|
|
|
false
|
|
|
|
),
|
|
|
|
BufferedPacketsDecision::Consume(_)
|
|
|
|
);
|
|
|
|
assert_matches!(
|
|
|
|
DecisionMaker::consume_or_forward_packets(&my_pubkey, None, None, false, false),
|
|
|
|
BufferedPacketsDecision::Hold
|
|
|
|
);
|
|
|
|
assert_matches!(
|
|
|
|
DecisionMaker::consume_or_forward_packets(&my_pubkey1, None, None, false, false),
|
|
|
|
BufferedPacketsDecision::Hold
|
|
|
|
);
|
|
|
|
|
|
|
|
assert_matches!(
|
|
|
|
DecisionMaker::consume_or_forward_packets(
|
|
|
|
&my_pubkey,
|
|
|
|
Some(my_pubkey1),
|
|
|
|
None,
|
|
|
|
false,
|
|
|
|
false
|
|
|
|
),
|
|
|
|
BufferedPacketsDecision::Forward
|
|
|
|
);
|
|
|
|
|
|
|
|
assert_matches!(
|
|
|
|
DecisionMaker::consume_or_forward_packets(
|
|
|
|
&my_pubkey,
|
|
|
|
Some(my_pubkey1),
|
|
|
|
None,
|
|
|
|
true,
|
|
|
|
true
|
|
|
|
),
|
|
|
|
BufferedPacketsDecision::Hold
|
|
|
|
);
|
|
|
|
assert_matches!(
|
|
|
|
DecisionMaker::consume_or_forward_packets(
|
|
|
|
&my_pubkey,
|
|
|
|
Some(my_pubkey1),
|
|
|
|
None,
|
|
|
|
true,
|
|
|
|
false
|
|
|
|
),
|
|
|
|
BufferedPacketsDecision::ForwardAndHold
|
|
|
|
);
|
|
|
|
assert_matches!(
|
|
|
|
DecisionMaker::consume_or_forward_packets(
|
|
|
|
&my_pubkey,
|
|
|
|
Some(my_pubkey1),
|
|
|
|
bank_start.clone(),
|
|
|
|
false,
|
|
|
|
false
|
|
|
|
),
|
|
|
|
BufferedPacketsDecision::Consume(_)
|
|
|
|
);
|
|
|
|
assert_matches!(
|
|
|
|
DecisionMaker::consume_or_forward_packets(
|
|
|
|
&my_pubkey1,
|
|
|
|
Some(my_pubkey1),
|
|
|
|
None,
|
|
|
|
false,
|
|
|
|
false
|
|
|
|
),
|
|
|
|
BufferedPacketsDecision::Hold
|
|
|
|
);
|
|
|
|
assert_matches!(
|
|
|
|
DecisionMaker::consume_or_forward_packets(
|
|
|
|
&my_pubkey1,
|
|
|
|
Some(my_pubkey1),
|
|
|
|
bank_start,
|
|
|
|
false,
|
|
|
|
false
|
|
|
|
),
|
|
|
|
BufferedPacketsDecision::Consume(_)
|
|
|
|
);
|
|
|
|
}
|
|
|
|
}
|