Geant4 Cross Reference

Cross-Referencing   Geant4
Geant4/processes/electromagnetic/dna/management/src/G4MemStat.cc

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  1 //
  2 // ********************************************************************
  3 // * License and Disclaimer                                           *
  4 // *                                                                  *
  5 // * The  Geant4 software  is  copyright of the Copyright Holders  of *
  6 // * the Geant4 Collaboration.  It is provided  under  the terms  and *
  7 // * conditions of the Geant4 Software License,  included in the file *
  8 // * LICENSE and available at  http://cern.ch/geant4/license .  These *
  9 // * include a list of copyright holders.                             *
 10 // *                                                                  *
 11 // * Neither the authors of this software system, nor their employing *
 12 // * institutes,nor the agencies providing financial support for this *
 13 // * work  make  any representation or  warranty, express or implied, *
 14 // * regarding  this  software system or assume any liability for its *
 15 // * use.  Please see the license in the file  LICENSE  and URL above *
 16 // * for the full disclaimer and the limitation of liability.         *
 17 // *                                                                  *
 18 // * This  code  implementation is the result of  the  scientific and *
 19 // * technical work of the GEANT4 collaboration.                      *
 20 // * By using,  copying,  modifying or  distributing the software (or *
 21 // * any work based  on the software)  you  agree  to acknowledge its *
 22 // * use  in  resulting  scientific  publications,  and indicate your *
 23 // * acceptance of all terms of the Geant4 Software license.          *
 24 // ********************************************************************
 25 //
 26 /*
 27  * MemStat.cc
 28  *
 29  *  Created on: 4 févr. 2014
 30  *      Author: kara
 31  */
 32 
 33 #include "G4MemStat.hh"
 34 
 35 #if ( defined(__MACH__) && defined(__clang__) && defined(__x86_64__) ) || \
 36     ( defined(__MACH__) && defined(__GNUC__) && __GNUC__>=4 && __GNUC_MINOR__>=7 ) || \
 37     defined(__linux__) || defined(_AIX)
 38 
 39 #include <unistd.h>
 40 
 41 #endif
 42 
 43 #include <ios>
 44 #include <iostream>
 45 #include <fstream>
 46 #include <string>
 47 
 48 namespace G4MemStat
 49 {
 50 
 51   using std::ios_base;
 52   using std::ifstream;
 53   using std::string;
 54 
 55   MemStat MemoryUsage()
 56   {
 57     MemStat output;
 58 
 59 #if ( defined(__MACH__) && defined(__clang__) && defined(__x86_64__) ) || \
 60     ( defined(__MACH__) && defined(__GNUC__) && __GNUC__>=4 && __GNUC_MINOR__>=7 ) || \
 61     defined(__linux__) || defined(_AIX)
 62 
 63     // 'file' stat seems to give the most reliable results
 64     //
 65     ifstream stat_stream("/proc/self/stat", ios_base::in);
 66 
 67     // dummy vars for leading entries in stat that we don't care about
 68     //
 69     string pid, comm, state, ppid, pgrp, session, tty_nr;
 70     string tpgid, flags, minflt, cminflt, majflt, cmajflt;
 71     string utime, stime, cutime, cstime, priority, nice;
 72     string O, itrealvalue, starttime;
 73 
 74     // the two fields we want
 75     //
 76     unsigned long vsize;
 77     long rss;
 78 
 79     stat_stream >> pid >> comm >> state >> ppid >> pgrp >> session >> tty_nr
 80     >> tpgid >> flags >> minflt >> cminflt >> majflt >> cmajflt >> utime
 81     >> stime >> cutime >> cstime >> priority >> nice >> O >> itrealvalue
 82     >> starttime >> vsize >> rss; // don't care about the rest
 83 
 84     stat_stream.close();
 85 
 86     long page_size_kb = sysconf(_SC_PAGE_SIZE) / 1024; // in case x86-64 is configured to use 2MB pages
 87     output.vmz = vsize / 1024.0;
 88     output.mem = rss * page_size_kb;
 89 #endif
 90 
 91     return output;
 92   }
 93 
 94   std::ostream & operator<<(std::ostream &os, const MemStat& memStat)
 95   {
 96     return os << "( vmz: " << memStat.vmz << ", " << "mem: " << memStat.mem
 97               << ")";
 98   }
 99 
100 }
101