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Add higher bound to validations to keep

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This commit is contained in:
Peng Wang
2021-04-29 15:17:29 -04:00
committed by manojsdoshi
parent 9fd5cd303d
commit 7717056cf2
3 changed files with 79 additions and 31 deletions
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2
src/ripple/app/misc/NegativeUNLVote.cpp
View File

@@ -167,7 +167,7 @@ NegativeUNLVote::buildScoreTable(
// Ask the validation container to keep enough validation message history
// for next time.
auto const seq = prevLedger->info().seq + 1;
validations.setSeqToKeep(seq - 1);
validations.setSeqToKeep(seq - 1, seq + FLAG_LEDGER_INTERVAL);
// Find FLAG_LEDGER_INTERVAL (i.e. 256) previous ledger hashes
auto const hashIndex = prevLedger->read(keylet::skip());

58
src/ripple/consensus/Validations.h
View File

@@ -324,8 +324,13 @@ class Validations
beast::uhash<>>
bySequence_;
// Sequence of the earliest validation to keep from expire
std::optional<Seq> toKeep_;
// A range [low_, high_) of validations to keep from expire
struct KeepRange
{
Seq low_;
Seq high_;
};
std::optional<KeepRange> toKeep_;
// Represents the ancestry of validated ledgers
LedgerTrie<Ledger> trie_;
@@ -698,14 +703,17 @@ public:
}
/**
* Set the smallest sequence number of validations to keep from expire
* @param s the sequence number
* Set the range [low, high) of validations to keep from expire
* @param low the lower sequence number
* @param high the higher sequence number
* @note high must be greater than low
*/
void
setSeqToKeep(Seq const& s)
setSeqToKeep(Seq const& low, Seq const& high)
{
std::lock_guard lock{mutex_};
toKeep_ = s;
assert(low < high);
toKeep_ = {low, high};
}
/** Expire old validation sets
@@ -719,21 +727,35 @@ public:
std::lock_guard lock{mutex_};
if (toKeep_)
{
for (auto i = byLedger_.begin(); i != byLedger_.end(); ++i)
// We only need to refresh the keep range when it's just about to
// expire. Track the next time we need to refresh.
static std::chrono::steady_clock::time_point refreshTime;
if (auto const now = byLedger_.clock().now(); refreshTime <= now)
{
auto const& validationMap = i->second;
if (!validationMap.empty() &&
validationMap.begin()->second.seq() >= toKeep_)
{
byLedger_.touch(i);
}
}
// The next refresh time is shortly before the expiration
// time from now.
refreshTime = now + parms_.validationSET_EXPIRES -
parms_.validationFRESHNESS;
for (auto i = bySequence_.begin(); i != bySequence_.end(); ++i)
{
if (i->first >= toKeep_)
for (auto i = byLedger_.begin(); i != byLedger_.end(); ++i)
{
bySequence_.touch(i);
auto const& validationMap = i->second;
if (!validationMap.empty())
{
auto const seq = validationMap.begin()->second.seq();
if (toKeep_->low_ <= seq && seq < toKeep_->high_)
{
byLedger_.touch(i);
}
}
}
for (auto i = bySequence_.begin(); i != bySequence_.end(); ++i)
{
if (toKeep_->low_ <= i->first && i->first < toKeep_->high_)
{
bySequence_.touch(i);
}
}
}
}