1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
16 //_________________________________________________________________________
17 //Basic Memory Leak utility.
18 // You can use this tiny class to *see* if your program is leaking.
20 // AliMemoryWatcher memwatcher;
21 // some program loop on events here {
22 // if ( nevents % x == 0 )
24 // // take a sample every x events
25 // memwatcher.Watch(nevents);
28 // TFile f("out.root","RECREATE");
29 // memwatcher.Write();
31 // In the output root file you'll get 3 graphs representing
32 // the evolAliPHOSon, as a function of the number of events, of :
33 // - VSIZE is the virtual size (in KBytes) of your program, that is sort of
34 // the total memory used
35 // - RSSIZE is the resident size (in KBytes), that is, the part of your
36 // program which is really in physical memory.
37 // - TIME is an estimate of time per event (really it's the time elasped
38 // between two calls to watch method)
39 // WARNING: this is far from a bulletproof memory report (it's basically
40 // using UNIX command ps -h -p [PID] -o vsize,rssize to do its job).
41 // It has only been tested on Linux so far.
42 // But by fitting the VSIZE by a pol1 under ROOT, you'll see right away
43 // by how much your program is leaking.
44 //*-- Author: Laurent Aphecetche(SUBATECH)
52 // --- AliRoot header files ---
54 #include "AliMemoryWatcher.h"
55 // --- ROOT system ---
59 #include "TStopwatch.h"
62 ClassImp(AliMemoryWatcher)
64 //_____________________________________________________________________________
65 AliMemoryWatcher::AliMemoryWatcher(UInt_t maxsize) :
68 fPID(gSystem->GetPid()),
71 fX(new Int_t[fMAXSIZE]),
72 fVSIZE(new Int_t[fMAXSIZE]),
73 fRSSIZE(new Int_t[fMAXSIZE]),
74 fTIME(new Double_t[fMAXSIZE]),
81 sprintf(fCmd,"ps -h -p %d -o vsz,rss | grep -v VSZ",fPID);
84 //_____________________________________________________________________________
85 AliMemoryWatcher::AliMemoryWatcher(const AliMemoryWatcher& mw):
87 fUseMallinfo(mw.fUseMallinfo),
89 fMAXSIZE(mw.fMAXSIZE),
91 fX(new Int_t[fMAXSIZE]),
92 fVSIZE(new Int_t[fMAXSIZE]),
93 fRSSIZE(new Int_t[fMAXSIZE]),
94 fTIME(new Double_t[fMAXSIZE]),
99 strcpy(fCmd, mw.fCmd) ;
102 //_____________________________________________________________________________
103 AliMemoryWatcher::~AliMemoryWatcher()
112 //_____________________________________________________________________________
113 void AliMemoryWatcher::Watch(Int_t x)
115 // Sets the point where CPU parameters have to be monitored
116 if ( !fDisabled && fSize < fMAXSIZE ) {
119 fTimer = new TStopwatch;
123 if ( fUseMallinfo ) {
125 static struct mallinfo meminfo;
126 meminfo = mallinfo();
128 fVSIZE[fSize] = (meminfo.hblkhd + meminfo.uordblks) / 1024;
129 fRSSIZE[fSize] = meminfo.uordblks / 1024;
130 fTIME[fSize] = fTimer->CpuTime();
133 AliFatal("Please SetUseMallinfo to kFALSE on this system");
136 static Int_t vsize, rssize;
137 static FILE* pipe = 0;
138 pipe = popen(fCmd,"r");
141 fscanf(pipe,"%d %d",&vsize,&rssize);
144 fVSIZE[fSize] = vsize ;
145 fRSSIZE[fSize] = rssize ;
146 fTIME[fSize] = fTimer->CpuTime();
149 assert(pclose(pipe)!=-1);
155 AliError("I'm full !" ) ;
158 //_____________________________________________________________________________
160 AliMemoryWatcher::GraphVSIZE(void)
162 // Fills the graph with the virtual memory sized used
166 g = new TGraph(Size());
168 for (i=0; i < g->GetN(); i++ ) {
169 g->SetPoint(i,X(i),VSIZE(i));
174 //_____________________________________________________________________________
176 AliMemoryWatcher::GraphRSSIZE(void)
178 // Fills the graph with the real memory sized used
182 g = new TGraph(Size());
184 for (i=0; i < g->GetN(); i++ ) {
185 g->SetPoint(i,X(i),RSSIZE(i));
190 //_____________________________________________________________________________
192 AliMemoryWatcher::GraphTIME(void)
194 // Fills the raph with the used CPU time
198 g = new TGraph(Size());
200 for (i=0; i < g->GetN(); i++ ) {
201 g->SetPoint(i,X(i),TIME(i));
206 //_____________________________________________________________________________
208 AliMemoryWatcher::Frame(void) const
210 //creates the frame histo in which the graphs will be plotted
216 for (i=0; i < Size() ; i++ ) {
217 if ( X(i) < xmin ) xmin = X(i);
218 if ( X(i) > xmax ) xmax = X(i);
219 Double_t y = VSIZE(i)+RSSIZE(i);
220 if ( y > ymax ) ymax = y;
221 if ( VSIZE(i) < ymin ) ymin = VSIZE(i);
222 if ( RSSIZE(i) < ymin ) ymin = RSSIZE(i);
224 TH2F* h = new TH2F("frame","",10,xmin,xmax,10,ymin*0.8,ymax*1.2);
227 //_____________________________________________________________________________
229 AliMemoryWatcher::WriteToFile()
231 // Stores the graphs in a file
232 if ( GraphVSIZE() ) GraphVSIZE()->Write("VSIZE",TObject::kOverwrite);
233 if ( GraphRSSIZE() ) GraphRSSIZE() ->Write("RSSIZE",TObject::kOverwrite);
234 if ( GraphTIME() ) GraphTIME()->Write("TIME",TObject::kOverwrite);