ProcStats Class Reference

#include </builds/gaudi/Gaudi/GaudiAud/src/ProcStats.h>

Public Member Functions
bool	fetch (procInfo &fill_me)
	Fill fill_me with the current memory usage of this process.

Static Public Member Functions
static ProcStats *	instance ()

Private Member Functions
	ProcStats ()=default

Detailed Description

Definition at line 27 of file ProcStats.h.

Constructor & Destructor Documentation

ProcStats()

ProcStats::ProcStats ( )

privatedefault

Member Function Documentation

fetch()

bool ProcStats::fetch

(

procInfo &

fill_me

)

Fill fill_me with the current memory usage of this process.

Returns false (and leaves fill_me untouched) if the information could not be retrieved (e.g. unsupported platform).

Definition at line 27 of file ProcStats.cpp.

                                   {
  constexpr double MB = 1.0 / ( 1024 * 1024 );
#if defined( __linux__ )
  // see proc(5): /proc/self/statm is "size resident shared text lib data dt" in pages
  // size and resident are identical to the vsize and rss fields of /proc/self/stat
  std::ifstream statm{ "/proc/self/statm" };
  unsigned long size = 0, resident = 0; // in pages
  if ( !( statm >> size >> resident ) || size == 0 ) { return false; }
  f.vsize = size * m_pageSize * MB;
  f.rss   = resident * m_pageSize * MB;
  return true;
#elif defined( __APPLE__ )
  task_basic_info_64_data_t info;
  mach_msg_type_number_t    count = TASK_BASIC_INFO_64_COUNT;
  if ( task_info( mach_task_self(), TASK_BASIC_INFO_64, reinterpret_cast<task_info_t>( &info ), &count ) !=
       KERN_SUCCESS ) {
    return false;
  }
  f.vsize = info.virtual_size * MB;
  f.rss   = info.resident_size * MB;
  return true;
#else
  return false;
#endif
}

instance()

ProcStats * ProcStats::instance ( )

static

Definition at line 22 of file ProcStats.cpp.

                               {
  static ProcStats inst{};
  return &inst;
}

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The documentation for this class was generated from the following files:

• GaudiAud/src/ProcStats.h
• GaudiAud/src/ProcStats.cpp