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71 lines
2.3 KiB
C++
71 lines
2.3 KiB
C++
// Copyright (C) 2007-2019 CEA/DEN, EDF R&D, OPEN CASCADE
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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//
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// See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
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//
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// File : SMDS_MemoryLimit.cxx
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// Created : Fri Sep 21 17:16:42 2007
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// Author : Edward AGAPOV (eap)
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// Executable to find out a lower RAM limit (MB), i.e. at what size of freeRAM
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// reported by sysinfo, no more memory can be allocated.
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// This is not done inside a function of SALOME because allocated memory is not always
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// returned to the system. (PAL16631)
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//
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#if !defined WIN32 && !defined __APPLE__
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#include <sys/sysinfo.h>
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#endif
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#ifdef _DEBUG_
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#include <iostream>
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#endif
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int main (int argc, char ** argv)
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{
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// To better understand what is going on here, consult bug [SALOME platform 0019911]
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#if !defined WIN32 && !defined __APPLE__
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struct sysinfo si;
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int err = sysinfo( &si );
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if ( err )
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return -1;
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unsigned long freeRamKb = ( si.freeram * si.mem_unit ) / 1024;
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// total RAM size in Gb, float is in order not to have 1 instead of 1.9
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float totalramGb = float( si.totalram * si.mem_unit ) / 1024 / 1024 / 1024;
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// nb Kbytes to allocate at one step. Small nb leads to hung up
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const int stepKb = int( 5 * totalramGb );
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unsigned long nbSteps = freeRamKb / stepKb * 2;
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try {
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while ( nbSteps-- ) {
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new char[stepKb*1024];
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err = sysinfo( &si );
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if ( !err )
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freeRamKb = ( si.freeram * si.mem_unit ) / 1024;
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}
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} catch (...) {}
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// #ifdef _DEBUG_
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// std::cout << freeRamKb / 1024 << std::endl;
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// #endif
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return freeRamKb / 1024;
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#endif
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return -1;
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}
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