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Optimize the relay map to use shared_ptr's

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* Switch mapRelay to use shared_ptr<CTransaction>
* Switch the relay code to copy mempool shared_ptr's, rather than copying
  the transaction itself.
* Change vRelayExpiration to store mapRelay iterators rather than hashes
  (smaller and faster).
This commit is contained in:
Pieter Wuille 2016-05-31 19:51:45 +02:00
parent 8d39d7a2cf
commit dbfb426b96
1 changed files with 16 additions and 21 deletions
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37
src/main.cpp
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@ -80,9 +80,6 @@ uint64_t nPruneTarget = 0;
int64_t nMaxTipAge = DEFAULT_MAX_TIP_AGE;
bool fEnableReplacement = DEFAULT_ENABLE_REPLACEMENT;
std::map<uint256, CTransaction> mapRelay;
std::deque<std::pair<int64_t, uint256> > vRelayExpiration;
CCriticalSection cs_mapRelay;
CFeeRate minRelayTxFee = CFeeRate(DEFAULT_MIN_RELAY_TX_FEE);
CAmount maxTxFee = DEFAULT_TRANSACTION_MAXFEE;
@ -215,6 +212,12 @@ namespace {
/** Number of peers from which we're downloading blocks. */
int nPeersWithValidatedDownloads = 0;
/** Relay map, protected by cs_main. */
typedef std::map<uint256, std::shared_ptr<const CTransaction>> MapRelay;
MapRelay mapRelay;
/** Expiration-time ordered list of (expire time, relay map entry) pairs, protected by cs_main). */
std::deque<std::pair<int64_t, MapRelay::iterator>> vRelayExpiration;
} // anon namespace
//////////////////////////////////////////////////////////////////////////////
@ -4505,31 +4508,24 @@ void static ProcessGetData(CNode* pfrom, const Consensus::Params& consensusParam
}
}
}
else if (inv.IsKnownType())
else if (inv.type == MSG_TX)
{
CTransaction tx;
// Send stream from relay memory
bool push = false;
{
LOCK(cs_mapRelay);
map<uint256, CTransaction>::iterator mi = mapRelay.find(inv.hash);
if (mi != mapRelay.end()) {
tx = (*mi).second;
push = true;
}
}
if (!push && inv.type == MSG_TX) {
auto mi = mapRelay.find(inv.hash);
if (mi != mapRelay.end()) {
pfrom->PushMessage(NetMsgType::TX, *mi->second);
push = true;
} else {
auto txinfo = mempool.info(inv.hash);
// To protect privacy, do not answer getdata using the mempool when
// that TX couldn't have been INVed in reply to a MEMPOOL request.
if (txinfo.tx && txinfo.nTime <= pfrom->timeLastMempoolReq) {
tx = *txinfo.tx;
pfrom->PushMessage(NetMsgType::TX, *txinfo.tx);
push = true;
}
}
if (push) {
pfrom->PushMessage(inv.GetCommand(), tx);
} else {
if (!push) {
vNotFound.push_back(inv);
}
}
@ -5978,7 +5974,6 @@ bool SendMessages(CNode* pto)
vInv.push_back(CInv(MSG_TX, hash));
nRelayedTransactions++;
{
LOCK(cs_mapRelay);
// Expire old relay messages
while (!vRelayExpiration.empty() && vRelayExpiration.front().first < GetTime())
{
@ -5986,9 +5981,9 @@ bool SendMessages(CNode* pto)
vRelayExpiration.pop_front();
}
auto ret = mapRelay.insert(std::make_pair(hash, *txinfo.tx));
auto ret = mapRelay.insert(std::make_pair(hash, std::move(txinfo.tx)));
if (ret.second) {
vRelayExpiration.push_back(std::make_pair(GetTime() + 15 * 60, hash));
vRelayExpiration.push_back(std::make_pair(GetTime() + 15 * 60, ret.first));
}
}
if (vInv.size() == MAX_INV_SZ) {