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efficiently sort transaction dependencies in one pass

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git-svn-id: https://bitcoin.svn.sourceforge.net/svnroot/bitcoin/trunk@184 1a98c847-1fd6-4fd8-948a-caf3550aa51b
This commit is contained in:
s_nakamoto 2010-11-19 20:22:46 +00:00
parent c4679ad0f1
commit 683bcb9154
3 changed files with 106 additions and 57 deletions
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123
main.cpp
View file

@ -598,6 +598,8 @@ bool CTransaction::AcceptToMemoryPool(CTxDB& txdb, bool fCheckInputs, bool* pfMi
if (i != 0)
return false;
ptxOld = mapNextTx[outpoint].ptx;
if (ptxOld->IsFinal())
return false;
if (!IsNewerThan(*ptxOld))
return false;
for (int i = 0; i < vin.size(); i++)
@ -3031,6 +3033,28 @@ extern unsigned int ScanHash_4WaySSE2(char* pmidstate, char* pblock, char* phash
class COrphan
{
public:
CTransaction* ptx;
set<uint256> setDependsOn;
double dPriority;
COrphan(CTransaction* ptxIn)
{
ptx = ptxIn;
dPriority = 0;
}
void print() const
{
printf("COrphan(hash=%s, dPriority=%.1f)\n", ptx->GetHash().ToString().substr(0,10).c_str(), dPriority);
foreach(uint256 hash, setDependsOn)
printf(" setDependsOn %s\n", hash.ToString().substr(0,10).c_str());
}
};
void BitcoinMiner()
{
@ -3098,6 +3122,8 @@ void BitcoinMiner()
CTxDB txdb("r");
// Priority order to process transactions
list<COrphan> vOrphan; // list memory doesn't move
map<uint256, vector<COrphan*> > mapDependers;
multimap<double, CTransaction*> mapPriority;
for (map<uint256, CTransaction>::iterator mi = mapTransactions.begin(); mi != mapTransactions.end(); ++mi)
{
@ -3105,6 +3131,7 @@ void BitcoinMiner()
if (tx.IsCoinBase() || !tx.IsFinal())
continue;
COrphan* porphan = NULL;
double dPriority = 0;
foreach(const CTxIn& txin, tx.vin)
{
@ -3112,7 +3139,18 @@ void BitcoinMiner()
CTransaction txPrev;
CTxIndex txindex;
if (!txPrev.ReadFromDisk(txdb, txin.prevout, txindex))
{
// Has to wait for dependencies
if (!porphan)
{
// Use list for automatic deletion
vOrphan.push_back(COrphan(&tx));
porphan = &vOrphan.back();
}
mapDependers[txin.prevout.hash].push_back(porphan);
porphan->setDependsOn.insert(txin.prevout.hash);
continue;
}
int64 nValueIn = txPrev.vout[txin.prevout.n].nValue;
// Read block header
@ -3138,55 +3176,66 @@ void BitcoinMiner()
// Priority is sum(valuein * age) / txsize
dPriority /= ::GetSerializeSize(tx, SER_NETWORK);
mapPriority.insert(make_pair(-dPriority, &(*mi).second));
if (porphan)
porphan->dPriority = dPriority;
else
mapPriority.insert(make_pair(-dPriority, &(*mi).second));
if (fDebug && mapArgs.count("-printpriority"))
printf("priority %-20.1f %s\n%s\n", dPriority, tx.GetHash().ToString().substr(0,10).c_str(), tx.ToString().c_str());
{
printf("priority %-20.1f %s\n%s", dPriority, tx.GetHash().ToString().substr(0,10).c_str(), tx.ToString().c_str());
if (porphan)
porphan->print();
printf("\n");
}
}
// Collect transactions into block
map<uint256, CTxIndex> mapTestPool;
uint64 nBlockSize = 1000;
int nBlockSigOps = 100;
bool fFoundSomething = true;
while (fFoundSomething)
while (!mapPriority.empty())
{
fFoundSomething = false;
for (multimap<double, CTransaction*>::iterator mi = mapPriority.begin(); mi != mapPriority.end();)
// Take highest priority transaction off priority queue
CTransaction& tx = *(*mapPriority.begin()).second;
mapPriority.erase(mapPriority.begin());
// Size limits
unsigned int nTxSize = ::GetSerializeSize(tx, SER_NETWORK);
if (nBlockSize + nTxSize >= MAX_BLOCK_SIZE_GEN)
continue;
int nTxSigOps = tx.GetSigOpCount();
if (nBlockSigOps + nTxSigOps >= MAX_BLOCK_SIGOPS)
continue;
// Transaction fee based on block size
int64 nMinFee = tx.GetMinFee(nBlockSize);
// Connecting shouldn't fail due to dependency on other memory pool transactions
// because we're already processing them in order of dependency
map<uint256, CTxIndex> mapTestPoolTmp(mapTestPool);
if (!tx.ConnectInputs(txdb, mapTestPoolTmp, CDiskTxPos(1,1,1), pindexPrev, nFees, false, true, nMinFee))
continue;
swap(mapTestPool, mapTestPoolTmp);
// Added
pblock->vtx.push_back(tx);
nBlockSize += nTxSize;
nBlockSigOps += nTxSigOps;
// Add transactions that depend on this one to the priority queue
uint256 hash = tx.GetHash();
if (mapDependers.count(hash))
{
CTransaction& tx = *(*mi).second;
unsigned int nTxSize = ::GetSerializeSize(tx, SER_NETWORK);
if (nBlockSize + nTxSize >= MAX_BLOCK_SIZE_GEN)
foreach(COrphan* porphan, mapDependers[hash])
{
mapPriority.erase(mi++);
continue;
if (!porphan->setDependsOn.empty())
{
porphan->setDependsOn.erase(hash);
if (porphan->setDependsOn.empty())
mapPriority.insert(make_pair(-porphan->dPriority, porphan->ptx));
}
}
int nTxSigOps = tx.GetSigOpCount();
if (nBlockSigOps + nTxSigOps >= MAX_BLOCK_SIGOPS)
{
mapPriority.erase(mi++);
continue;
}
// Transaction fee based on block size
int64 nMinFee = tx.GetMinFee(nBlockSize);
// Connecting can fail due to dependency on other memory pool transactions
// that aren't in the block yet, so keep trying in later passes
map<uint256, CTxIndex> mapTestPoolTmp(mapTestPool);
if (!tx.ConnectInputs(txdb, mapTestPoolTmp, CDiskTxPos(1,1,1), pindexPrev, nFees, false, true, nMinFee))
{
mi++;
continue;
}
swap(mapTestPool, mapTestPoolTmp);
// Added
pblock->vtx.push_back(tx);
nBlockSize += nTxSize;
nBlockSigOps += nTxSigOps;
fFoundSomething = true;
mapPriority.erase(mi++);
}
}
}

38
net.cpp
View file

@ -177,25 +177,6 @@ bool GetMyExternalIP(unsigned int& ipRet)
for (int nHost = 1; nHost <= 2; nHost++)
{
if (nHost == 1)
{
addrConnect = CAddress("72.233.89.199:80"); // www.whatismyip.com
if (nLookup == 1)
{
struct hostent* phostent = gethostbyname("www.whatismyip.com");
if (phostent && phostent->h_addr_list && phostent->h_addr_list[0])
addrConnect = CAddress(*(u_long*)phostent->h_addr_list[0], htons(80));
}
pszGet = "GET /automation/n09230945.asp HTTP/1.1\r\n"
"Host: www.whatismyip.com\r\n"
"User-Agent: Bitcoin/1.0 (see www.bitcoin.org)\r\n"
"Connection: close\r\n"
"\r\n";
pszKeyword = NULL; // Returns just IP address
}
else if (nHost == 2)
{
addrConnect = CAddress("91.198.22.70:80"); // checkip.dyndns.org
@ -214,6 +195,25 @@ bool GetMyExternalIP(unsigned int& ipRet)
pszKeyword = "Address:";
}
else if (nHost == 2)
{
addrConnect = CAddress("74.208.43.192:80"); // www.showmyip.com
if (nLookup == 1)
{
struct hostent* phostent = gethostbyname("www.showmyip.com");
if (phostent && phostent->h_addr_list && phostent->h_addr_list[0])
addrConnect = CAddress(*(u_long*)phostent->h_addr_list[0], htons(80));
}
pszGet = "GET /simple/ HTTP/1.1\r\n"
"Host: www.showmyip.com\r\n"
"User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1)\r\n"
"Connection: close\r\n"
"\r\n";
pszKeyword = NULL; // Returns just IP address
}
if (GetMyExternalIP2(addrConnect, pszGet, pszKeyword, ipRet))
return true;

2
serialize.h
View file

@ -22,7 +22,7 @@ class CDataStream;
class CAutoFile;
static const unsigned int MAX_SIZE = 0x02000000;
static const int VERSION = 31501;
static const int VERSION = 31502;
static const char* pszSubVer = "";