ARCHIVE/xahaud
3
0
Fork 0
mirror of https://github.com/Xahau/xahaud.git synced 2025-12-06 17:27:52 +00:00
Code Issues Packages Projects Releases Wiki Activity

Cache the hashes of nodes known to be full below.

Browse Source 
Remove the TNByID entries for those nodes in state trees.
This reduces the memory and I/O neded during ledger fetching and prevents
ledger fetching from crushing other caches.
This commit is contained in:
JoelKatz
2013-04-19 14:22:52 -07:00
parent 38e3ab2b97
commit b993c6ee32
4 changed files with 78 additions and 42 deletions
Download Patch File Download Diff File Expand all files Collapse all files

106
src/cpp/ripple/SHAMapSync.cpp
View File

@@ -15,6 +15,8 @@ SETUP_LOG();
static const uint256 uZero;
KeyCache<uint256> SHAMap::fullBelowCache("fullBelowCache", 65536, 240);
void SHAMap::getMissingNodes(std::vector<SHAMapNode>& nodeIDs, std::vector<uint256>& hashes, int max,
SHAMapSyncFilter* filter)
{
@@ -49,46 +51,56 @@ void SHAMap::getMissingNodes(std::vector<SHAMapNode>& nodeIDs, std::vector<uint2
int branch = (base + ii) % 16;
if (!node->isEmptyBranch(branch))
{
SHAMapNode childID = node->getChildNodeID(branch);
const uint256& childHash = node->getChildHash(branch);
SHAMapTreeNode* d = NULL;
try
if (!fullBelowCache.isPresent(childHash))
{
d = getNodePointer(childID, childHash);
}
catch (SHAMapMissingNode&)
{ // node is not in the map
if (filter != NULL)
SHAMapNode childID = node->getChildNodeID(branch);
SHAMapTreeNode* d = NULL;
try
{
std::vector<unsigned char> nodeData;
if (filter->haveNode(childID, childHash, nodeData))
d = getNodePointer(childID, childHash);
}
catch (SHAMapMissingNode&)
{ // node is not in the map
if (filter != NULL)
{
assert(mSeq >= 1);
SHAMapTreeNode::pointer ptr =
boost::make_shared<SHAMapTreeNode>(childID, nodeData, mSeq - 1, snfPREFIX, childHash, true);
cLog(lsTRACE) << "Got sync node from cache: " << *ptr;
mTNByID[*ptr] = ptr;
d = ptr.get();
std::vector<unsigned char> nodeData;
if (filter->haveNode(childID, childHash, nodeData))
{
assert(mSeq >= 1);
SHAMapTreeNode::pointer ptr =
boost::make_shared<SHAMapTreeNode>(childID, nodeData, mSeq - 1, snfPREFIX, childHash, true);
cLog(lsTRACE) << "Got sync node from cache: " << *ptr;
mTNByID[*ptr] = ptr;
d = ptr.get();
}
}
}
}
if (!d)
{ // we need this node
nodeIDs.push_back(childID);
hashes.push_back(childHash);
if (--max <= 0)
return;
have_all = false;
}
else if (d->isInner() && !d->isFullBelow()) // we might need children of this node
{
have_all = false;
stack.push(d);
if (!d)
{ // we need this node
nodeIDs.push_back(childID);
hashes.push_back(childHash);
if (--max <= 0)
return;
have_all = false;
}
else if (d->isInner() && !d->isFullBelow()) // we might need children of this node
{
have_all = false;
stack.push(d);
}
}
}
}
if (have_all)
{
node->setFullBelow();
if (mType == smtSTATE)
{
fullBelowCache.add(node->getHash());
dropBelow(node);
}
}
}
if (nodeIDs.empty())
clearSynching();
@@ -123,27 +135,37 @@ std::vector<uint256> SHAMap::getNeededHashes(int max)
if (!node->isEmptyBranch(branch))
{
const uint256& childHash = node->getChildHash(branch);
try
if (!fullBelowCache.isPresent(childHash))
{
SHAMapTreeNode* d = getNodePointer(node->getChildNodeID(branch), childHash);
assert(d);
if (d->isInner() && !d->isFullBelow())
try
{
have_all = false;
stack.push(d);
SHAMapTreeNode* d = getNodePointer(node->getChildNodeID(branch), childHash);
assert(d);
if (d->isInner() && !d->isFullBelow())
{
have_all = false;
stack.push(d);
}
}
catch (SHAMapMissingNode&)
{ // node is not in the map
have_all = false;
ret.push_back(childHash);
if (--max <= 0)
return ret;
}
}
catch (SHAMapMissingNode&)
{ // node is not in the map
have_all = false;
ret.push_back(childHash);
if (--max <= 0)
return ret;
}
}
}
if (have_all)
{
node->setFullBelow();
if (mType == smtSTATE)
{
fullBelowCache.add(node->getHash());
dropBelow(node);
}
}
}
if (ret.empty())
clearSynching();