Line data    Source code

       1              : /*
       2              :  * Copyright (c) 2011-2015:  G-CSC, Goethe University Frankfurt
       3              :  * Author: Markus Breit
       4              :  *
       5              :  * This file is part of UG4.
       6              :  *
       7              :  * UG4 is free software: you can redistribute it and/or modify it under the
       8              :  * terms of the GNU Lesser General Public License version 3 (as published by the
       9              :  * Free Software Foundation) with the following additional attribution
      10              :  * requirements (according to LGPL/GPL v3 §7):
      11              :  *
      12              :  * (1) The following notice must be displayed in the Appropriate Legal Notices
      13              :  * of covered and combined works: "Based on UG4 (www.ug4.org/license)".
      14              :  *
      15              :  * (2) The following notice must be displayed at a prominent place in the
      16              :  * terminal output of covered works: "Based on UG4 (www.ug4.org/license)".
      17              :  *
      18              :  * (3) The following bibliography is recommended for citation and must be
      19              :  * preserved in all covered files:
      20              :  * "Reiter, S., Vogel, A., Heppner, I., Rupp, M., and Wittum, G. A massively
      21              :  *   parallel geometric multigrid solver on hierarchically distributed grids.
      22              :  *   Computing and visualization in science 16, 4 (2013), 151-164"
      23              :  * "Vogel, A., Reiter, S., Rupp, M., Nägel, A., and Wittum, G. UG4 -- a novel
      24              :  *   flexible software system for simulating pde based models on high performance
      25              :  *   computers. Computing and visualization in science 16, 4 (2013), 165-179"
      26              :  *
      27              :  * This program is distributed in the hope that it will be useful,
      28              :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      29              :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
      30              :  * GNU Lesser General Public License for more details.
      31              :  */
      32              : 
      33              : #include "mem_info.h"
      34              : 
      35              : #include <unistd.h>
      36              : #include <ios>
      37              : #include <fstream>
      38              : #include <string>
      39              : 
      40              : 
      41              : namespace ug {
      42              : 
      43              : 
      44            0 : void MemInfo::memory_consumption()
      45              : {
      46              :         // 'file' stat seems to give the most reliable results
      47            0 :         std::ifstream stat_stream("/proc/self/stat", std::ios_base::in);
      48              : 
      49              :         // dummy vars for leading entries in stat that we don't care about
      50              :         std::string dummy;
      51              :         long rss;
      52              : 
      53              :         stat_stream >> dummy >> dummy >> dummy >> dummy >> dummy >> dummy >> dummy
      54              :                            >> dummy >> dummy >> dummy >> dummy >> dummy >> dummy
      55              :                            >> dummy >> dummy >> dummy >> dummy >> dummy >> dummy
      56            0 :                            >> dummy >> dummy >> dummy >> m_locVirt >> rss;
      57              : 
      58            0 :         stat_stream.close();
      59              : 
      60            0 :         long page_size_kb = sysconf(_SC_PAGE_SIZE);
      61            0 :         m_locRes = rss * page_size_kb;
      62              : 
      63            0 :         communicate_process_values();
      64            0 : }
      65              : 
      66              : 
      67              : } // namespace ug