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TMemStatShow Class Reference

Utility class post-processing the file generated by TMemStat (default memstat.root)

TMemStat records all the calls to malloc and free and write a TTree with the position where the memory is allocated/freed , as well as the number of bytes.

To use the class TMemStat, add the following statement at the beginning of your script or program

TMemStat mm("gnubuiltin");

or in an interactive session do something like:

root > TMemStat mm("gnubuiltin");
root > .x somescript.C
root > .q

another (may be more practical way) is to modify $ROOTSYS/etc/system.rootrc and activate the variable

Root.TMemStat: 1

The file collected by TMemStat is named memstat_ProcessID and can be analyzed and results shown by executing the static function Show. When TMemStat is active it recors every call to malloc/free in a ROOT Tree. You must be careful when running jobs with many millions (or more) of calls to malloc/free because the generated Tree may become very large. The TMemStat constructor TMemStat(const char* system, Int_t buffersize, Int_t maxcalls) has its 3 arguments optional:

Simply do:

or specifying arguments

root > TMemStat::Show(0.1,20,"mydir/mymemstat.root");

The first argument to Show is the percentage of the time of the original job that produced the file after which the display is updated. By default update=0.1, ie 10 time intervals will be shown. The second argument is nbigleaks. if <=0 canvas2 and canvas3 are not shown The third argument is the imput file name (result of TMemStat). If this argument is omitted, Show will take the most recent file generated by TMemStat.

You can restrict the address range to be analyzed via TMemStatShow::SetAddressRange You can restrict the entry range to be analyzed via TMemStatShow::SetEntryRange

Definition at line 36 of file TMemStatShow.h.

Public Member Functions

 TMemStatShow ()
 
virtual ~TMemStatShow ()
 
- Public Member Functions inherited from TObject
 TObject ()
 
 TObject (const TObject &object)
 TObject copy ctor. More...
 
TObjectoperator= (const TObject &rhs)
 TObject assignment operator. More...
 
virtual ~TObject ()
 TObject destructor. More...
 
virtual void AppendPad (Option_t *option="")
 Append graphics object to current pad. More...
 
virtual void Browse (TBrowser *b)
 Browse object. May be overridden for another default action. More...
 
virtual const char * ClassName () const
 Returns name of class to which the object belongs. More...
 
virtual void Clear (Option_t *="")
 
virtual TObjectClone (const char *newname="") const
 Make a clone of an object using the Streamer facility. More...
 
virtual Int_t Compare (const TObject *obj) const
 Compare abstract method. More...
 
virtual void Copy (TObject &object) const
 Copy this to obj. More...
 
virtual void Delete (Option_t *option="")
 Delete this object. More...
 
virtual Int_t DistancetoPrimitive (Int_t px, Int_t py)
 Computes distance from point (px,py) to the object. More...
 
virtual void Draw (Option_t *option="")
 Default Draw method for all objects. More...
 
virtual void DrawClass () const
 Draw class inheritance tree of the class to which this object belongs. More...
 
virtual TObjectDrawClone (Option_t *option="") const
 Draw a clone of this object in the current pad. More...
 
virtual void Dump () const
 Dump contents of object on stdout. More...
 
virtual void Execute (const char *method, const char *params, Int_t *error=0)
 Execute method on this object with the given parameter string, e.g. More...
 
virtual void Execute (TMethod *method, TObjArray *params, Int_t *error=0)
 Execute method on this object with parameters stored in the TObjArray. More...
 
virtual void ExecuteEvent (Int_t event, Int_t px, Int_t py)
 Execute action corresponding to an event at (px,py). More...
 
virtual TObjectFindObject (const char *name) const
 Must be redefined in derived classes. More...
 
virtual TObjectFindObject (const TObject *obj) const
 Must be redefined in derived classes. More...
 
virtual Option_tGetDrawOption () const
 Get option used by the graphics system to draw this object. More...
 
virtual UInt_t GetUniqueID () const
 Return the unique object id. More...
 
virtual const char * GetName () const
 Returns name of object. More...
 
virtual const char * GetIconName () const
 Returns mime type name of object. More...
 
virtual Option_tGetOption () const
 
virtual char * GetObjectInfo (Int_t px, Int_t py) const
 Returns string containing info about the object at position (px,py). More...
 
virtual const char * GetTitle () const
 Returns title of object. More...
 
virtual Bool_t HandleTimer (TTimer *timer)
 Execute action in response of a timer timing out. More...
 
virtual ULong_t Hash () const
 Return hash value for this object. More...
 
virtual Bool_t InheritsFrom (const char *classname) const
 Returns kTRUE if object inherits from class "classname". More...
 
virtual Bool_t InheritsFrom (const TClass *cl) const
 Returns kTRUE if object inherits from TClass cl. More...
 
virtual void Inspect () const
 Dump contents of this object in a graphics canvas. More...
 
virtual Bool_t IsFolder () const
 Returns kTRUE in case object contains browsable objects (like containers or lists of other objects). More...
 
virtual Bool_t IsEqual (const TObject *obj) const
 Default equal comparison (objects are equal if they have the same address in memory). More...
 
virtual Bool_t IsSortable () const
 
Bool_t IsOnHeap () const
 
Bool_t IsZombie () const
 
virtual Bool_t Notify ()
 This method must be overridden to handle object notification. More...
 
virtual void ls (Option_t *option="") const
 The ls function lists the contents of a class on stdout. More...
 
virtual void Paint (Option_t *option="")
 This method must be overridden if a class wants to paint itself. More...
 
virtual void Pop ()
 Pop on object drawn in a pad to the top of the display list. More...
 
virtual void Print (Option_t *option="") const
 This method must be overridden when a class wants to print itself. More...
 
virtual Int_t Read (const char *name)
 Read contents of object with specified name from the current directory. More...
 
virtual void RecursiveRemove (TObject *obj)
 Recursively remove this object from a list. More...
 
virtual void SaveAs (const char *filename="", Option_t *option="") const
 Save this object in the file specified by filename. More...
 
virtual void SavePrimitive (std::ostream &out, Option_t *option="")
 Save a primitive as a C++ statement(s) on output stream "out". More...
 
virtual void SetDrawOption (Option_t *option="")
 Set drawing option for object. More...
 
virtual void SetUniqueID (UInt_t uid)
 Set the unique object id. More...
 
virtual void UseCurrentStyle ()
 Set current style settings in this object This function is called when either TCanvas::UseCurrentStyle or TROOT::ForceStyle have been invoked. More...
 
virtual Int_t Write (const char *name=0, Int_t option=0, Int_t bufsize=0)
 Write this object to the current directory. More...
 
virtual Int_t Write (const char *name=0, Int_t option=0, Int_t bufsize=0) const
 Write this object to the current directory. More...
 
voidoperator new (size_t sz)
 
voidoperator new[] (size_t sz)
 
voidoperator new (size_t sz, void *vp)
 
voidoperator new[] (size_t sz, void *vp)
 
void operator delete (void *ptr)
 Operator delete. More...
 
void operator delete[] (void *ptr)
 Operator delete []. More...
 
void SetBit (UInt_t f, Bool_t set)
 Set or unset the user status bits as specified in f. More...
 
void SetBit (UInt_t f)
 
void ResetBit (UInt_t f)
 
Bool_t TestBit (UInt_t f) const
 
Int_t TestBits (UInt_t f) const
 
void InvertBit (UInt_t f)
 
virtual void Info (const char *method, const char *msgfmt,...) const
 Issue info message. More...
 
virtual void Warning (const char *method, const char *msgfmt,...) const
 Issue warning message. More...
 
virtual void Error (const char *method, const char *msgfmt,...) const
 Issue error message. More...
 
virtual void SysError (const char *method, const char *msgfmt,...) const
 Issue system error message. More...
 
virtual void Fatal (const char *method, const char *msgfmt,...) const
 Issue fatal error message. More...
 
void AbstractMethod (const char *method) const
 Use this method to implement an "abstract" method that you don't want to leave purely abstract. More...
 
void MayNotUse (const char *method) const
 Use this method to signal that a method (defined in a base class) may not be called in a derived class (in principle against good design since a child class should not provide less functionality than its parent, however, sometimes it is necessary). More...
 
void Obsolete (const char *method, const char *asOfVers, const char *removedFromVers) const
 Use this method to declare a method obsolete. More...
 

Static Public Member Functions

static void EventInfo1 (Int_t event, Int_t px, Int_t py, TObject *selected)
 Static: draw the tooltip showing the backtrace for the allocatios histogram. More...
 
static void EventInfo2 (Int_t event, Int_t px, Int_t py, TObject *selected)
 Static: draw the tooltip showing the backtrace for the histogram of leaks. More...
 
static void FillBTString (Int_t bin, Int_t mode, TString &btstring)
 Static: fill btstring with the traceback corresponding to entry in T btstring must be initialized in calling function. More...
 
static void SetAddressRange (Long64_t nbytes=0, Long64_t first=0)
 Specify a memory address range to process (static function). More...
 
static void SetEntryRange (Long64_t nentries=0, Long64_t first=0)
 Specify a range of entries to process (static function) More...
 
static void Show (Double_t update=0.1, Int_t nbigleaks=20, const char *fname="*")
 Function called by TMemStat::Show Open the memstat data file, then call TTree::Draw to precompute the arrays of positions and nbytes per entry. More...
 
- Static Public Member Functions inherited from TObject
static Long_t GetDtorOnly ()
 Return destructor only flag. More...
 
static void SetDtorOnly (void *obj)
 Set destructor only flag. More...
 
static Bool_t GetObjectStat ()
 Get status of object stat flag. More...
 
static void SetObjectStat (Bool_t stat)
 Turn on/off tracking of objects in the TObjectTable. More...
 

Static Protected Attributes

static TTreefgT = 0
 
static TH1DfgHalloc = 0
 
static TH1DfgHfree = 0
 
static TH1DfgH = 0
 
static TH1IfgHleaks = 0
 
static TH1IfgHentry = 0
 
static TH1IfgHdiff = 0
 
static TGToolTipfgTip1 = 0
 
static TGToolTipfgTip2 = 0
 
static TObjArrayfgBtidlist = 0
 
static Double_tfgV1 = 0
 
static Double_tfgV2 = 0
 
static Double_tfgV3 = 0
 
static Double_tfgV4 = 0
 
static TCanvasfgC1 = 0
 
static TCanvasfgC2 = 0
 
static TCanvasfgC3 = 0
 
static Long64_t fgAddressFirst = 0
 
static Long64_t fgAddressN = 0
 
static Long64_t fgEntryFirst = 0
 
static Long64_t fgEntryN = 0
 

Additional Inherited Members

- Public Types inherited from TObject
enum  EStatusBits {
  kCanDelete = BIT(0), kMustCleanup = BIT(3), kObjInCanvas = BIT(3), kIsReferenced = BIT(4),
  kHasUUID = BIT(5), kCannotPick = BIT(6), kNoContextMenu = BIT(8), kInvalidObject = BIT(13)
}
 
enum  { kIsOnHeap = 0x01000000, kNotDeleted = 0x02000000, kZombie = 0x04000000, kBitMask = 0x00ffffff }
 
enum  { kSingleKey = BIT(0), kOverwrite = BIT(1), kWriteDelete = BIT(2) }
 
- Protected Member Functions inherited from TObject
void MakeZombie ()
 
virtual void DoError (int level, const char *location, const char *fmt, va_list va) const
 Interface to ErrorHandler (protected). More...
 

#include <TMemStatShow.h>

Inheritance diagram for TMemStatShow:
[legend]

Constructor & Destructor Documentation

TMemStatShow::TMemStatShow ( )
inline

Definition at line 64 of file TMemStatShow.h.

virtual TMemStatShow::~TMemStatShow ( )
inlinevirtual

Definition at line 65 of file TMemStatShow.h.

Member Function Documentation

void TMemStatShow::EventInfo1 ( Int_t  event,
Int_t  px,
Int_t  py,
TObject selected 
)
static

Static: draw the tooltip showing the backtrace for the allocatios histogram.

Definition at line 539 of file TMemStatShow.cxx.

void TMemStatShow::EventInfo2 ( Int_t  event,
Int_t  px,
Int_t  py,
TObject selected 
)
static

Static: draw the tooltip showing the backtrace for the histogram of leaks.

Definition at line 588 of file TMemStatShow.cxx.

void TMemStatShow::FillBTString ( Int_t  bin,
Int_t  mode,
TString btstring 
)
static

Static: fill btstring with the traceback corresponding to entry in T btstring must be initialized in calling function.

Definition at line 615 of file TMemStatShow.cxx.

Referenced by EventInfo1(), EventInfo2(), and Show().

void TMemStatShow::SetAddressRange ( Long64_t  nbytes = 0,
Long64_t  first = 0 
)
static

Specify a memory address range to process (static function).

This function can be used to restrict the range of memory addresses to be analyzed. For example whem TmemStat is run on a 64 bits machine and the results visualized on a 32 bits machine, it might be necessary to restrict the analysis range to the addresses below 2 Gigabytes, eg TMemStatShow::SetMemoryRange(500000000,0); //analyse only the first 500 MBytes

  • first : first address to process (default is 0)
  • nbytes : number of addresses in bytes to process starting at first if 0 (default), then all addresses are processed

Definition at line 141 of file TMemStatShow.cxx.

void TMemStatShow::SetEntryRange ( Long64_t  nentries = 0,
Long64_t  first = 0 
)
static

Specify a range of entries to process (static function)

  • first : first entry to process (default is 0)
  • nentries : number of entries to process starting at first if 0 (default), then all entries are processed call this function when the amount of data collected in the Tree is large and therefore making the analysis slow.

Definition at line 155 of file TMemStatShow.cxx.

void TMemStatShow::Show ( Double_t  update = 0.1,
Int_t  nbigleaks = 20,
const char *  fname = "*" 
)
static

Function called by TMemStat::Show Open the memstat data file, then call TTree::Draw to precompute the arrays of positions and nbytes per entry.

update is the time interval in the data file in seconds after which the display is updated. For example is the job producing the memstat.root file took 100s to execute, an update of 0.1s will generate 1000 time views of the memory use. the histogram hbigleaks will contain the nbigleaks largest leaks if fname=="*" (default), the most recent file memstat*.root will be taken.

Definition at line 172 of file TMemStatShow.cxx.

Member Data Documentation

Long64_t TMemStatShow::fgAddressFirst = 0
staticprotected

Definition at line 58 of file TMemStatShow.h.

Referenced by SetAddressRange().

Long64_t TMemStatShow::fgAddressN = 0
staticprotected

Definition at line 59 of file TMemStatShow.h.

Referenced by SetAddressRange(), and Show().

TObjArray * TMemStatShow::fgBtidlist = 0
staticprotected

Definition at line 49 of file TMemStatShow.h.

Referenced by FillBTString(), and Show().

TCanvas * TMemStatShow::fgC1 = 0
staticprotected

Definition at line 54 of file TMemStatShow.h.

Referenced by EventInfo1(), and Show().

TCanvas * TMemStatShow::fgC2 = 0
staticprotected

Definition at line 55 of file TMemStatShow.h.

Referenced by EventInfo2(), and Show().

TCanvas * TMemStatShow::fgC3 = 0
staticprotected

Definition at line 56 of file TMemStatShow.h.

Referenced by Show().

Long64_t TMemStatShow::fgEntryFirst = 0
staticprotected

Definition at line 60 of file TMemStatShow.h.

Referenced by SetEntryRange(), and Show().

Long64_t TMemStatShow::fgEntryN = 0
staticprotected

Definition at line 61 of file TMemStatShow.h.

Referenced by SetEntryRange(), and Show().

TH1D * TMemStatShow::fgH = 0
staticprotected

Definition at line 42 of file TMemStatShow.h.

Referenced by EventInfo1(), and Show().

TH1D * TMemStatShow::fgHalloc = 0
staticprotected

Definition at line 40 of file TMemStatShow.h.

Referenced by Show().

TH1I * TMemStatShow::fgHdiff = 0
staticprotected

Definition at line 45 of file TMemStatShow.h.

Referenced by Show().

TH1I * TMemStatShow::fgHentry = 0
staticprotected

Definition at line 44 of file TMemStatShow.h.

Referenced by EventInfo2(), and Show().

TH1D * TMemStatShow::fgHfree = 0
staticprotected

Definition at line 41 of file TMemStatShow.h.

Referenced by Show().

TH1I * TMemStatShow::fgHleaks = 0
staticprotected

Definition at line 43 of file TMemStatShow.h.

Referenced by EventInfo2(), and Show().

TTree * TMemStatShow::fgT = 0
staticprotected

Definition at line 39 of file TMemStatShow.h.

Referenced by EventInfo1(), FillBTString(), and Show().

TGToolTip * TMemStatShow::fgTip1 = 0
staticprotected

Definition at line 47 of file TMemStatShow.h.

Referenced by EventInfo1(), and Show().

TGToolTip * TMemStatShow::fgTip2 = 0
staticprotected

Definition at line 48 of file TMemStatShow.h.

Referenced by EventInfo2(), and Show().

Double_t * TMemStatShow::fgV1 = 0
staticprotected

Definition at line 50 of file TMemStatShow.h.

Referenced by EventInfo1(), and Show().

Double_t * TMemStatShow::fgV2 = 0
staticprotected

Definition at line 51 of file TMemStatShow.h.

Referenced by EventInfo1(), and Show().

Double_t * TMemStatShow::fgV3 = 0
staticprotected

Definition at line 52 of file TMemStatShow.h.

Referenced by EventInfo1(), EventInfo2(), and Show().

Double_t * TMemStatShow::fgV4 = 0
staticprotected

Definition at line 53 of file TMemStatShow.h.

Referenced by FillBTString(), and Show().

Collaboration diagram for TMemStatShow:
[legend]

The documentation for this class was generated from the following files: