1. Marian Ivanov, Anar Manafov
ROOT - Memory checker
Marian Ivanov, Anar Manafov

2. Outlook Motivation Code availability Example – run the checker
Example – analysis of the memory checker output

3. Motivation (0)
The check of the memory consumption very important for large project
Several crisis in ALIROOT during the last years
Standard tools (free software)
Valgrind - memory consumption leaks at the end of process (e.g. aliroot)
Massif – time profile of memory consumption
Problems (Vagrind)
Slow down factor ~ 50 ( few days for AliRoot simulation)
Impossible to use for AliRoot project

4. Motivation (1) Root memory checker
Originally developed by MI
Much faster - slow down factor ~ 2-3
But,
Had problems with loading of libraries on demand (current root, aliroot strategy)
Did not provide dynamic memory information
Problems to port it on 64 bit platform

5. New memory checker All (previously mentioned)problems removed
Adding functionality for the visualization of the memory consumption as function of time (stamps)
Possibility to select information by library, functions
Sorting according different criterias
(Current memory usage, Max, memory usage, maximal number of allocations..)
Make reports for selected code
Possibility to use as automatic test
General remark
Faster
More functionality

6. Code availability Code availbale in Alisoft repository
Installation example (last release version)
svn co
cd v0-01
make
source memstat_env.sh

7. Simple example
See $MEMSTAT/test diretory
root.exe
.x test/run_test.C

8. TPC calibration example
Initialization – In root prompt or macro
gSystem->Load("$ROOTSYS/lib/libGui.so");
gSystem->Load("$ROOTSYS/lib/libTree.so");
gSystem->Load("$MEMSTAT/libMemStat.so");
TMemStat memstat( , ,kTRUE);
memstat->AddStamp("Start");
AliSysInfo::AddCallBack(TMemStatManager::GetInstance()->fStampCallBack);
Code
Create manager
mgr->SetNSysInfo(100);
mgr->StartAnalysis("local",chain);
Output – memstat.root file to be visualized, analyzed

9. Simple example - Report with selected function

10. Simple example – Report full

11. Simple example - Draw
draw->Draw()

12. Analysis example - Draw
draw->Draw()

13. GUI
Work in progress - all features to be integrated