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Greatly simplify call stack tree calculation.

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Instead of caching paths, compute accumulated cost of each path and only
then create the tree, going through each path just once.
This commit is contained in:
Bartosz Taudul 2018-08-19 16:34:26 +02:00
parent e1821e439a
commit 6224daf9c9
1 changed files with 33 additions and 39 deletions
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58
server/TracyView.cpp
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@ -6537,9 +6537,15 @@ static tracy_force_inline CallstackFrameTree* GetFrameTreeItem( std::vector<Call
std::vector<CallstackFrameTree> View::GetCallstackFrameTree( const MemData& mem ) const
{
struct PathData
{
uint32_t cnt;
uint64_t mem;
};
std::vector<CallstackFrameTree> root;
std::vector<Vector<uint32_t>> paths;
paths.resize( m_worker.GetCallstackPayloadCount() );
flat_hash_map<uint32_t, PathData, nohash<uint32_t>> pathSum;
pathSum.reserve( m_worker.GetCallstackPayloadCount() );
const auto zvMid = m_zvStart + ( m_zvEnd - m_zvStart ) / 2;
@ -6548,48 +6554,36 @@ std::vector<CallstackFrameTree> View::GetCallstackFrameTree( const MemData& mem
if( ev.csAlloc == 0 ) continue;
if( m_memInfo.restrictTime && ev.timeAlloc >= zvMid ) continue;
auto& path = paths[ev.csAlloc];
if( !path.empty() )
auto it = pathSum.find( ev.csAlloc );
if( it == pathSum.end() )
{
auto treePtr = &root;
CallstackFrameTree* node = nullptr;
for( auto& v : path )
{
node = treePtr->data() + v;
node->countInclusive++;
node->allocInclusive += ev.size;
treePtr = &node->children;
}
assert( treePtr->empty() );
node->countExclusive++;
node->allocExclusive += ev.size;
pathSum.emplace( ev.csAlloc, PathData { 1, ev.size } );
}
else
{
auto& cs = m_worker.GetCallstack( ev.csAlloc );
Vector<uint32_t> path;
path.reserve( cs.size() );
it->second.cnt++;
it->second.mem += ev.size;
}
}
for( auto& path : pathSum )
{
auto& cs = m_worker.GetCallstack( path.first );
auto base = cs.back();
auto treePtr = GetFrameTreeItem( root, base );
treePtr->countInclusive++;
treePtr->allocInclusive += ev.size;
path.push_back( uint32_t( treePtr - root.data() ) );
treePtr->countInclusive += path.second.cnt;
treePtr->allocInclusive += path.second.mem;
for( int i = int( cs.size() ) - 2; i >= 0; i-- )
{
auto newTreePtr = GetFrameTreeItem( treePtr->children, cs[i] );
newTreePtr->countInclusive++;
newTreePtr->allocInclusive += ev.size;
path.push_back( uint32_t( newTreePtr - treePtr->children.data() ) );
treePtr = newTreePtr;
treePtr = GetFrameTreeItem( treePtr->children, cs[i] );
treePtr->countInclusive += path.second.cnt;
treePtr->allocInclusive += path.second.mem;
}
treePtr->countExclusive++;
treePtr->allocExclusive += ev.size;
paths[ev.csAlloc] = std::move( path );
}
treePtr->countExclusive += path.second.cnt;
treePtr->allocExclusive += path.second.mem;
}
return root;
}