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d60522e4 | 1 | /************************************************************************** |
2 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
3 | * * | |
4 | * Author: The ALICE Off-line Project. * | |
5 | * Contributors are mentioned in the code where appropriate. * | |
6 | * * | |
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 | **************************************************************************/ | |
15 | /* $Id$ */ | |
16 | //_________________________________________________________________________ | |
17 | /*Basic Memory Leak utility. | |
18 | ||
19 | You can use this tiny class to *see* if your program is leaking. | |
d60522e4 | 20 | Usage: |
d60522e4 | 21 | AliPHOSMemoryWatcher memwatcher; |
d60522e4 | 22 | some program loop on events here { |
23 | if ( nevents % x == 0 ) | |
24 | { | |
25 | // take a sample every x events | |
26 | memwatcher.watch(nevents); | |
27 | } | |
28 | } | |
d60522e4 | 29 | TFile f("out.root","RECREATE"); |
30 | memwatcher.write(); | |
31 | f.Close(); | |
d60522e4 | 32 | In the output root file you'll get 3 graphs representing |
33 | the evolAliPHOSon, as a function of the number of events, of : | |
34 | - VSIZE is the virtual size (in KBytes) of your program, that is sort of | |
35 | the total memory used | |
36 | - RSSIZE is the resident size (in KBytes), that is, the part of your | |
37 | program which is really in physical memory. | |
38 | - TIME is an estimate of time per event (really it's the time elasped | |
39 | between two calls to watch method) | |
d60522e4 | 40 | WARNING: this is far from a bulletproof memory report (it's basically |
41 | using UNIX command ps -h -p [PID] -o vsize,rssize to do its job). | |
42 | It has only been tested on Linux so far. | |
43 | ||
44 | But by fitting the VSIZE by a pol1 under ROOT, you'll see right away | |
45 | by how much your program is leaking. | |
46 | */ | |
47 | //*-- Author: Laurent Aphecetche(SUBATECH) | |
d60522e4 | 48 | // --- std system --- |
b01af8c2 | 49 | class assert ; |
d60522e4 | 50 | // --- AliRoot header files --- |
51 | #include "AliPHOSMemoryWatcher.h" | |
d60522e4 | 52 | // --- ROOT system --- |
53 | #include "TSystem.h" | |
54 | #include "TGraph.h" | |
55 | #include "TH2.h" | |
56 | #include "TStopwatch.h" | |
dfe7f75b | 57 | |
58 | ClassImp(AliPHOSMemoryWatcher) | |
59 | ||
d60522e4 | 60 | //_____________________________________________________________________________ |
b01af8c2 | 61 | AliPHOSMemoryWatcher::AliPHOSMemoryWatcher(UInt_t maxsize) |
d60522e4 | 62 | { |
b01af8c2 | 63 | //ctor |
d60522e4 | 64 | fMAXSIZE=maxsize; |
65 | fPID = gSystem->GetPid(); | |
66 | sprintf(fCmd,"ps -h -p %d -o vsize,rssize",fPID); | |
b01af8c2 | 67 | fX = new Int_t[fMAXSIZE]; |
68 | fVSIZE = new Int_t[fMAXSIZE]; | |
69 | fRSSIZE = new Int_t[fMAXSIZE]; | |
70 | fTIME = new Double_t[fMAXSIZE]; | |
d60522e4 | 71 | fSize=0; |
72 | fDisabled=false; | |
73 | fTimer=0; | |
74 | } | |
d60522e4 | 75 | //_____________________________________________________________________________ |
76 | AliPHOSMemoryWatcher::~AliPHOSMemoryWatcher() | |
77 | { | |
78 | delete[] fVSIZE; | |
79 | delete[] fRSSIZE; | |
80 | delete[] fX; | |
81 | delete[] fTIME; | |
82 | delete fTimer; | |
83 | } | |
d60522e4 | 84 | //_____________________________________________________________________________ |
b01af8c2 | 85 | void AliPHOSMemoryWatcher::Watch(Int_t x) |
d60522e4 | 86 | { |
b01af8c2 | 87 | // Sets the point where CPU parameters have to be monitored |
d60522e4 | 88 | if ( !fDisabled && fSize < fMAXSIZE ) { |
d60522e4 | 89 | if ( fSize==0 ) { |
90 | assert(fTimer==0); | |
91 | fTimer = new TStopwatch; | |
92 | fTimer->Start(true); | |
93 | fTimer->Stop(); | |
94 | } | |
b01af8c2 | 95 | static Int_t vsize, rssize; |
d60522e4 | 96 | static FILE* pipe = 0; |
d60522e4 | 97 | pipe = popen(fCmd,"r"); |
d60522e4 | 98 | if ( pipe ) { |
99 | ||
100 | fscanf(pipe,"%d %d",&vsize,&rssize); | |
101 | ||
102 | fX[fSize] = x ; | |
103 | fVSIZE[fSize] = vsize ; | |
104 | fRSSIZE[fSize] = rssize ; | |
105 | fTIME[fSize] = fTimer->CpuTime(); | |
106 | fSize++; | |
107 | } | |
d60522e4 | 108 | assert(pclose(pipe)!=-1); |
d60522e4 | 109 | fTimer->Start(true); |
d60522e4 | 110 | } |
111 | else { | |
112 | fDisabled=true; | |
21cd0c07 | 113 | Error("watch", "I'm full !" ) ; |
d60522e4 | 114 | } |
115 | } | |
d60522e4 | 116 | //_____________________________________________________________________________ |
117 | TGraph* | |
b01af8c2 | 118 | AliPHOSMemoryWatcher::GraphVSIZE(void) |
d60522e4 | 119 | { |
b01af8c2 | 120 | // Fills the graph with the virtual memory sized used |
d60522e4 | 121 | TGraph* g = 0; |
d60522e4 | 122 | if ( size() ) |
123 | { | |
124 | g = new TGraph(size()); | |
b01af8c2 | 125 | Int_t i ; |
126 | for (i=0; i < g->GetN(); i++ ) { | |
d60522e4 | 127 | g->SetPoint(i,X(i),VSIZE(i)); |
128 | } | |
129 | } | |
130 | return g; | |
131 | } | |
d60522e4 | 132 | //_____________________________________________________________________________ |
133 | TGraph* | |
b01af8c2 | 134 | AliPHOSMemoryWatcher::GraphRSSIZE(void) |
d60522e4 | 135 | { |
b01af8c2 | 136 | // Fills the graph with the real memory sized used |
d60522e4 | 137 | TGraph* g = 0; |
138 | if ( size() ) | |
139 | { | |
140 | g = new TGraph(size()); | |
b01af8c2 | 141 | Int_t i ; |
142 | for (i=0; i < g->GetN(); i++ ) { | |
d60522e4 | 143 | g->SetPoint(i,X(i),RSSIZE(i)); |
144 | } | |
145 | } | |
146 | return g; | |
147 | } | |
d60522e4 | 148 | //_____________________________________________________________________________ |
149 | TGraph* | |
b01af8c2 | 150 | AliPHOSMemoryWatcher::GraphTIME(void) |
d60522e4 | 151 | { |
b01af8c2 | 152 | // Fills the raph with the used CPU time |
d60522e4 | 153 | TGraph* g = 0; |
154 | if ( size() ) | |
155 | { | |
156 | g = new TGraph(size()); | |
b01af8c2 | 157 | Int_t i ; |
158 | for (i=0; i < g->GetN(); i++ ) { | |
d60522e4 | 159 | g->SetPoint(i,X(i),TIME(i)); |
160 | } | |
161 | } | |
162 | return g; | |
163 | } | |
d60522e4 | 164 | //_____________________________________________________________________________ |
165 | TH2* | |
b01af8c2 | 166 | AliPHOSMemoryWatcher::Frame(void) const |
d60522e4 | 167 | { |
b01af8c2 | 168 | //creates the frame histo in which the graphs will be plotted |
169 | Double_t xmin=1E30; | |
170 | Double_t xmax=0; | |
171 | Double_t ymin=1; | |
172 | Double_t ymax=0; | |
173 | UInt_t i ; | |
174 | for (i=0; i < size() ; i++ ) { | |
d60522e4 | 175 | if ( X(i) < xmin ) xmin = X(i); |
176 | if ( X(i) > xmax ) xmax = X(i); | |
b01af8c2 | 177 | Double_t y = VSIZE(i)+RSSIZE(i); |
d60522e4 | 178 | if ( y > ymax ) ymax = y; |
d60522e4 | 179 | if ( VSIZE(i) < ymin ) ymin = VSIZE(i); |
180 | if ( RSSIZE(i) < ymin ) ymin = RSSIZE(i); | |
181 | } | |
d60522e4 | 182 | TH2F* h = new TH2F("frame","",10,xmin,xmax,10,ymin*0.8,ymax*1.2); |
d60522e4 | 183 | return h; |
184 | } | |
d60522e4 | 185 | //_____________________________________________________________________________ |
186 | void | |
b01af8c2 | 187 | AliPHOSMemoryWatcher::Write(void) |
d60522e4 | 188 | { |
b01af8c2 | 189 | // Stores the graphs in a file |
190 | if ( GraphVSIZE() ) GraphVSIZE()->Write("VSIZE",TObject::kOverwrite); | |
191 | if ( GraphRSSIZE() ) GraphRSSIZE()->Write("RSSIZE",TObject::kOverwrite); | |
192 | if ( GraphTIME() ) GraphTIME()->Write("TIME",TObject::kOverwrite); | |
4ed9ed00 | 193 | } |