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Switch to optimistic conf for notifying gossip subscribers (#11289) 

Co-authored-by: Carl <carl@solana.com>
This commit is contained in:
carllin 2020-07-30 02:52:27 -07:00 committed by GitHub
parent bf18524368
commit a23e1129a9
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2 changed files with 33 additions and 129 deletions
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153
core/src/cluster_info_vote_listener.rs
View File

@ -24,7 +24,6 @@ use solana_perf::packet::{self, Packets};
use solana_runtime::{
bank::Bank,
bank_forks::BankForks,
commitment::VOTE_THRESHOLD_SIZE,
epoch_stakes::{EpochAuthorizedVoters, EpochStakes},
stakes::Stakes,
};
@ -62,7 +61,6 @@ pub struct SlotVoteTracker {
voted: HashMap<Arc<Pubkey>, bool>,
optimistic_votes_tracker: HashMap<Hash, VoteStakeTracker>,
updates: Option<Vec<Arc<Pubkey>>>,
total_voted_stake: u64,
gossip_only_stake: u64,
}
@ -118,7 +116,6 @@ impl VoteTracker {
voted: HashMap::new(),
optimistic_votes_tracker: HashMap::default(),
updates: None,
total_voted_stake: 0,
gossip_only_stake: 0,
}));
self.slot_vote_trackers
@ -599,7 +596,8 @@ impl ClusterInfoVoteListener {
if is_confirmed {
new_optimistic_confirmed_slots.push((*slot, last_vote_hash));
// TODO: Notify subscribers about new optimistic confirmation
// Notify subscribers about new optimistic confirmation
subscriptions.notify_gossip_subscribers(*slot);
}
if !is_new && !is_gossip_vote {
@ -714,25 +712,19 @@ impl ClusterInfoVoteListener {
if w_slot_tracker.updates.is_none() {
w_slot_tracker.updates = Some(vec![]);
}
let mut current_stake = 0;
let mut gossip_only_stake = 0;
let epoch = root_bank.epoch_schedule().get_epoch(slot);
let epoch_stakes = root_bank.epoch_stakes(epoch);
for (pubkey, seen_in_gossip_above) in slot_diff {
let is_new = !w_slot_tracker.voted.contains_key(&pubkey);
Self::sum_stake(
&mut current_stake,
&mut gossip_only_stake,
epoch_stakes,
&pubkey,
if seen_in_gossip_above {
// By this point we know if the vote was seen in gossip above,
// it was not seen in gossip at any point in the past, so it's
// safe to pass this in here as an overall indicator of whether
// this vote is new
seen_in_gossip_above,
is_new,
);
// it was not seen in gossip at any point in the past (if it was seen
// in gossip in the past, `is_new` would be false and it would have
// been filtered out above), so it's safe to increment the gossip-only
// stake
Self::sum_stake(&mut gossip_only_stake, epoch_stakes, &pubkey);
}
// From the `slot_diff.retain` earlier, we know because there are
// no other writers to `slot_vote_tracker` that
@ -743,14 +735,7 @@ impl ClusterInfoVoteListener {
.insert(pubkey.clone(), seen_in_gossip_above);
w_slot_tracker.updates.as_mut().unwrap().push(pubkey);
}
Self::notify_for_stake_change(
current_stake,
w_slot_tracker.total_voted_stake,
&subscriptions,
epoch_stakes,
slot,
);
w_slot_tracker.total_voted_stake += current_stake;
w_slot_tracker.gossip_only_stake += gossip_only_stake
}
new_optimistic_confirmed_slots
@ -775,43 +760,10 @@ impl ClusterInfoVoteListener {
.add_vote_pubkey(pubkey, stake, total_epoch_stake)
}
fn notify_for_stake_change(
current_stake: u64,
previous_stake: u64,
subscriptions: &RpcSubscriptions,
epoch_stakes: Option<&EpochStakes>,
slot: Slot,
) {
if let Some(stakes) = epoch_stakes {
let supermajority_stake = (stakes.total_stake() as f64 * VOTE_THRESHOLD_SIZE) as u64;
if previous_stake < supermajority_stake
&& (previous_stake + current_stake) > supermajority_stake
{
subscriptions.notify_gossip_subscribers(slot);
}
}
}
fn sum_stake(
sum: &mut u64,
gossip_only_stake: &mut u64,
epoch_stakes: Option<&EpochStakes>,
pubkey: &Pubkey,
is_new_from_gossip: bool,
is_new: bool,
) {
if !is_new_from_gossip && !is_new {
return;
}
fn sum_stake(sum: &mut u64, epoch_stakes: Option<&EpochStakes>, pubkey: &Pubkey) {
if let Some(stakes) = epoch_stakes {
if let Some(vote_account) = stakes.stakes().vote_accounts().get(pubkey) {
if is_new {
*sum += vote_account.0;
}
if is_new_from_gossip {
*gossip_only_stake += vote_account.0;
}
*sum += vote_account.0;
}
}
}
@ -1315,7 +1267,7 @@ mod tests {
let (replay_votes_sender, replay_votes_receiver) = unbounded();
let vote_slot = 1;
let vote_bank_hash = Hash::default();
// Events:
// 0: Send gossip vote
// 1: Send replay vote
@ -1339,7 +1291,7 @@ mod tests {
// Create vote transaction
let vote_tx = vote_transaction::new_vote_transaction(
vec![vote_slot],
Hash::default(),
vote_bank_hash,
Hash::default(),
node_keypair,
vote_keypair,
@ -1371,12 +1323,24 @@ mod tests {
if events == vec![1] {
// Check `gossip_only_stake` is not incremented
assert_eq!(r_slot_vote_tracker.total_voted_stake, 100);
assert_eq!(
r_slot_vote_tracker
.optimistic_votes_tracker(&vote_bank_hash)
.unwrap()
.stake(),
100
);
assert_eq!(r_slot_vote_tracker.gossip_only_stake, 0);
} else {
// Check that both the `gossip_only_stake` and `total_voted_stake` both
// increased
assert_eq!(r_slot_vote_tracker.total_voted_stake, 100);
assert_eq!(
r_slot_vote_tracker
.optimistic_votes_tracker(&vote_bank_hash)
.unwrap()
.stake(),
100
);
assert_eq!(r_slot_vote_tracker.gossip_only_stake, 100);
}
}
@ -1718,72 +1682,13 @@ mod tests {
let (_, bank, validator_voting_keypairs, _) = setup();
let vote_keypair = &validator_voting_keypairs[0].vote_keypair;
let epoch_stakes = bank.epoch_stakes(bank.epoch()).unwrap();
// If `is_new_from_gossip` and `is_new` are both true, both fields
// should increase
let mut total_voted_stake = 0;
let mut gossip_only_stake = 0;
let is_new_from_gossip = true;
let is_new = true;
ClusterInfoVoteListener::sum_stake(
&mut total_voted_stake,
&mut gossip_only_stake,
Some(epoch_stakes),
&vote_keypair.pubkey(),
is_new_from_gossip,
is_new,
);
assert_eq!(total_voted_stake, 100);
assert_eq!(gossip_only_stake, 100);
// If `is_new_from_gossip` and `is_new` are both false, none should increase
let mut total_voted_stake = 0;
let mut gossip_only_stake = 0;
let is_new_from_gossip = false;
let is_new = false;
ClusterInfoVoteListener::sum_stake(
&mut total_voted_stake,
&mut gossip_only_stake,
Some(epoch_stakes),
&vote_keypair.pubkey(),
is_new_from_gossip,
is_new,
);
assert_eq!(total_voted_stake, 0);
assert_eq!(gossip_only_stake, 0);
// If only `is_new`, but not `is_new_from_gossip` then
// `total_voted_stake` will increase, but `gossip_only_stake` won't
let mut total_voted_stake = 0;
let mut gossip_only_stake = 0;
let is_new_from_gossip = false;
let is_new = true;
ClusterInfoVoteListener::sum_stake(
&mut total_voted_stake,
&mut gossip_only_stake,
Some(epoch_stakes),
&vote_keypair.pubkey(),
is_new_from_gossip,
is_new,
);
assert_eq!(total_voted_stake, 100);
assert_eq!(gossip_only_stake, 0);
// If only `is_new_from_gossip`, but not `is_new` then
// `gossip_only_stake` will increase, but `total_voted_stake` won't
let mut total_voted_stake = 0;
let mut gossip_only_stake = 0;
let is_new_from_gossip = true;
let is_new = false;
ClusterInfoVoteListener::sum_stake(
&mut total_voted_stake,
&mut gossip_only_stake,
Some(epoch_stakes),
&vote_keypair.pubkey(),
is_new_from_gossip,
is_new,
);
assert_eq!(total_voted_stake, 0);
assert_eq!(gossip_only_stake, 100);
}

9
core/src/vote_stake_tracker.rs
View File

@ -22,12 +22,11 @@ impl VoteStakeTracker {
let is_new = !self.voted.contains(&vote_pubkey);
if is_new {
self.voted.insert(vote_pubkey);
let ratio_before = self.stake as f64 / total_epoch_stake as f64;
let supermajority_stake = (total_epoch_stake as f64 * VOTE_THRESHOLD_SIZE) as u64;
let previous_stake = self.stake;
self.stake += stake;
let ratio_now = self.stake as f64 / total_epoch_stake as f64;
(
ratio_before <= VOTE_THRESHOLD_SIZE && ratio_now > VOTE_THRESHOLD_SIZE,
previous_stake <= supermajority_stake && self.stake > supermajority_stake,
is_new,
)
} else {
@ -66,7 +65,7 @@ mod test {
assert!(!is_confirmed2);
assert!(!is_new2);
// at i == 7, the voted stake is 70%, which is the first time crossing
// at i == 6, the voted stake is 70%, which is the first time crossing
// the supermajority threshold
if i == 6 {
assert!(is_confirmed);