Rene,
ROOT version 4.00/08
I open the TFile first, then create a new tree. It would't
fit in memory anyway .
peter
>On Wed, Aug 11, 2004 at 05:49:50PM +0200, Rene Brun wrote:
> Peter,
>
> Are you sure that you do not build a memory-resident Tree?
> When you create teh tree, proceed like
> TFile *f = new TFile("myfile.root","recreate");
> TTree *T = new TTree("T",..);
> and not the inverse.
>
> If the symptom still p;ersists, send the result of
> T->Print();
> after a reasonable number of entries.
>
> You do not indicate which version of ROOT. I assume 4.00/08.
>
> Rene Brun
>
> On Wed, 11 Aug
> 2004, Peter Skensved wrote:
>
> > Hi,
> >
> > I'm running an application which builds a large tree. It shows
> > signs of memory leaks so I started running it with memory checking
> > turned on . The first ( and largest ) item in the leak.info file is
> > as follows :
> >
> >
> > Leaked allocations: 151 Leaked size: 608077
> > operator new[](unsigned) (newdelete/src/NewDelete.cxx:333).
> > 333 return ::operator new(size);
> > TBasket::WriteBuffer() (tree/src/TBasket.cxx:487).
> > 487 fBuffer = new char[buflen];
> > TBranch::Fill() (tree/src/TBranch.cxx:487).
> > 487 Int_t nout = basket->WriteBuffer(); // Write buffer
> > TBranchElement::Fill() (tree/src/TBranchElement.cxx:923).
> > 923 if (!TestBit(kDoNotProcess)) nbytes += TBranch::Fill();
> > TBranchElement::Fill() (tree/src/TBranchElement.cxx:920).
> > 920 if (!branch->TestBit(kDoNotProcess)) nbytes += branch->Fill();
> > TTree::Fill() (tree/src/TTree.cxx:2249).
> > 2249 nbytes += branch->Fill();
> > main (FillTree.cxx:1523).
> > 1523 sno->Fill();
> >
> >
> >
> > Am I correct in interpreting this as 151 instances of a leak of .6 Mb ?
> >
> > I looked at the code in TBasket::WriteBuffer() . I don't understand a lot of it
> > but two things struck me : fBuffer is never deleted and fBuffer appears to be
> > re-assigned inside the loop.
> >
> >
> >
> > I'm using version 4.00.08
> >
> >
> > peter
> >
> >
> >
> > ----
> >
> > Peter Skensved Email : peter@SNO.Phy.QueensU.CA
> > Dept. of Physics,
> > Queen's University,
> > Kingston, Ontario,
> > Canada
> >
> >
> >
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