/// <summary> Returns a difference between old and new memory allocation stats. </summary>
public static FMemoryAllocationStatsV3 Diff(FMemoryAllocationStatsV3 Old, FMemoryAllocationStatsV3 New)
{
FMemoryAllocationStatsV3 Diff = new FMemoryAllocationStatsV3();
FieldInfo[] FieldInfos = typeof(FMemoryAllocationStatsV3).GetFields();
int PropertiesNum = FieldInfos.Length;
for (int FieldIndex = 0; FieldIndex < PropertiesNum; FieldIndex++)
{
Int64 OldValue = (Int64)FieldInfos[FieldIndex].GetValue(Old);
Int64 NewValue = (Int64)FieldInfos[FieldIndex].GetValue(New);
FieldInfos[FieldIndex].SetValue(Diff, NewValue - OldValue);
}
return(Diff);
}
/// <summary> Diffs two snapshots and creates a result one. </summary>
public static FStreamSnapshot DiffSnapshots(FStreamSnapshot Old, FStreamSnapshot New)
{
// Create result snapshot object.
FStreamSnapshot ResultSnapshot = new FStreamSnapshot("Diff " + Old.Description + " <-> " + New.Description);
using (FScopedLogTimer LoadingTime = new FScopedLogTimer("FStreamSnapshot.DiffSnapshots"))
{
// Copy over allocation count so we can track where the graph starts
ResultSnapshot.AllocationCount = Old.AllocationCount;
Debug.Assert(Old.MetricArray.Count == New.MetricArray.Count);
ResultSnapshot.MetricArray = new List <long>(Old.MetricArray.Count);
for (int CallstackIndex = 0; CallstackIndex < Old.MetricArray.Count; CallstackIndex++)
{
ResultSnapshot.MetricArray.Add(New.MetricArray[CallstackIndex] - Old.MetricArray[CallstackIndex]);
}
ResultSnapshot.MemoryAllocationStats3 = FMemoryAllocationStatsV3.Diff(Old.MemoryAllocationStats3, New.MemoryAllocationStats3);
ResultSnapshot.MemoryAllocationStats4 = FMemoryAllocationStatsV4.Diff(Old.MemoryAllocationStats4, New.MemoryAllocationStats4);
ResultSnapshot.StreamIndex = New.StreamIndex;
ResultSnapshot.bIsDiffResult = true;
ResultSnapshot.AllocationMaxSize = New.AllocationMaxSize - Old.AllocationMaxSize;
ResultSnapshot.AllocationSize = New.AllocationSize - Old.AllocationSize;
ResultSnapshot.CurrentTime = 0;
ResultSnapshot.ElapsedTime = New.CurrentTime - Old.CurrentTime;
ResultSnapshot.FrameNumber = New.FrameNumber - Old.FrameNumber;
ResultSnapshot.LoadedLevels = New.LoadedLevels;
// These lists are guaranteed to be sorted by callstack index.
List <FCallStackAllocationInfo> OldActiveCallStackList = Old.ActiveCallStackList;
List <FCallStackAllocationInfo> NewActiveCallStackList = New.ActiveCallStackList;
List <FCallStackAllocationInfo> ResultActiveCallStackList = new List <FCallStackAllocationInfo>(FStreamInfo.GlobalInstance.CallStackArray.Count);
int OldIndex = 0;
int NewIndex = 0;
while (true)
{
FCallStackAllocationInfo OldAllocInfo = OldActiveCallStackList[OldIndex];
FCallStackAllocationInfo NewAllocInfo = NewActiveCallStackList[NewIndex];
if (OldAllocInfo.CallStackIndex == NewAllocInfo.CallStackIndex)
{
long ResultSize = NewAllocInfo.Size - OldAllocInfo.Size;
int ResultCount = NewAllocInfo.Count - OldAllocInfo.Count;
if (ResultSize != 0 || ResultCount != 0)
{
ResultActiveCallStackList.Add(new FCallStackAllocationInfo(ResultSize, NewAllocInfo.CallStackIndex, ResultCount));
}
OldIndex++;
NewIndex++;
}
else if (OldAllocInfo.CallStackIndex > NewAllocInfo.CallStackIndex)
{
ResultActiveCallStackList.Add(NewAllocInfo);
NewIndex++;
}
else // OldAllocInfo.CallStackIndex < NewAllocInfo.CallStackIndex
{
ResultActiveCallStackList.Add(new FCallStackAllocationInfo(-OldAllocInfo.Size, OldAllocInfo.CallStackIndex, -OldAllocInfo.Count));
OldIndex++;
}
if (OldIndex >= OldActiveCallStackList.Count)
{
for ( ; NewIndex < NewActiveCallStackList.Count; NewIndex++)
{
ResultActiveCallStackList.Add(NewActiveCallStackList[NewIndex]);
}
break;
}
if (NewIndex >= NewActiveCallStackList.Count)
{
for ( ; OldIndex < OldActiveCallStackList.Count; OldIndex++)
{
ResultActiveCallStackList.Add(OldActiveCallStackList[OldIndex]);
}
break;
}
}
// Check that list was correctly constructed.
for (int CallstackIndex = 0; CallstackIndex < ResultActiveCallStackList.Count - 1; CallstackIndex++)
{
Debug.Assert(ResultActiveCallStackList[CallstackIndex].CallStackIndex < ResultActiveCallStackList[CallstackIndex + 1].CallStackIndex);
}
ResultActiveCallStackList.TrimExcess();
ResultSnapshot.ActiveCallStackList = ResultActiveCallStackList;
// Iterate over new lifetime callstack info and subtract previous one.
for (int CallStackIndex = 0; CallStackIndex < New.LifetimeCallStackList.Count; CallStackIndex++)
{
ResultSnapshot.LifetimeCallStackList[CallStackIndex] = FCallStackAllocationInfo.Diff(
New.LifetimeCallStackList[CallStackIndex],
Old.LifetimeCallStackList[CallStackIndex]);
}
// Handle overall memory timeline
if (New.OverallMemorySlice.Count > Old.OverallMemorySlice.Count)
{
ResultSnapshot.OverallMemorySlice = new List <FMemorySlice>(New.OverallMemorySlice);
ResultSnapshot.OverallMemorySlice.RemoveRange(0, Old.OverallMemorySlice.Count);
}
else
{
ResultSnapshot.OverallMemorySlice = new List <FMemorySlice>(Old.OverallMemorySlice);
ResultSnapshot.OverallMemorySlice.RemoveRange(0, New.OverallMemorySlice.Count);
ResultSnapshot.OverallMemorySlice.Reverse();
}
}
return(ResultSnapshot);
}
/// <summary> Creates a new copy of this class. </summary>
public FMemoryAllocationStatsV3 DeepCopy()
{
FMemoryAllocationStatsV3 Copy = ( FMemoryAllocationStatsV3 )MemberwiseClone();
return(Copy);
}
/// <summary> Returns a difference between old and new memory allocation stats. </summary>
public static FMemoryAllocationStatsV3 Diff( FMemoryAllocationStatsV3 Old, FMemoryAllocationStatsV3 New )
{
FMemoryAllocationStatsV3 Diff = new FMemoryAllocationStatsV3();
FieldInfo[] FieldInfos = typeof( FMemoryAllocationStatsV3 ).GetFields();
int PropertiesNum = FieldInfos.Length;
for( int FieldIndex = 0; FieldIndex < PropertiesNum; FieldIndex++ )
{
Int64 OldValue = (Int64)FieldInfos[ FieldIndex ].GetValue( Old );
Int64 NewValue = (Int64)FieldInfos[ FieldIndex ].GetValue( New );
FieldInfos[ FieldIndex ].SetValue( Diff, NewValue-OldValue );
}
return Diff;
}