Trk::MemoryLogger Class Reference

A small helper class looking at /proc/<PID>status. More...

#include <MemoryLogger.h>

Collaboration diagram for Trk::MemoryLogger:

Public Member Functions
	MemoryLogger ()
	Default constructor.
void	refresh (int pid) const
	update the memory logger
float	vmSize () const
	vsize/rss returnal
float	vmRss () const

Private Attributes
std::atomic< float >	m_vsize
	virtual memory size
std::atomic< float >	m_rss
	real memory size

Detailed Description

A small helper class looking at /proc/<PID>status.

to monitor the memory usage of the Geometry objects

Author

Andre.nosp@m.as.S.nosp@m.alzbu.nosp@m.rger.nosp@m.@cern.nosp@m..ch

Definition at line 30 of file MemoryLogger.h.

Constructor & Destructor Documentation

MemoryLogger()

Trk::MemoryLogger::MemoryLogger

(

)

Default constructor.

Definition at line 13 of file MemoryLogger.cxx.

  : m_vsize{ -1 }
  , m_rss{ -1 }
{}

Member Function Documentation

refresh()

void Trk::MemoryLogger::refresh

(

int

pid

)

const

update the memory logger

Definition at line 19 of file MemoryLogger.cxx.

{
 
#ifndef __APPLE__
  // memory monitoring
  std::ostringstream filename;
  filename << "/proc/" << pid << "/status";
 
  std::ifstream status(filename.str().c_str());
  std::string buff;
  float vsize;
  float rss;
  // loop over the files in the input
  while (!status.eof()) {
    status >> buff;
    if (buff == "VmSize:")
      status >> vsize;
    if (buff == "VmRSS:")
      status >> rss;
  }
  // close the file again
  status.close();
  m_vsize.store(vsize);
  m_rss.store(vsize);
#else
#warning MemoryLogger does not yet work on the mac.
#endif
}

vmRss()

float Trk::MemoryLogger::vmRss ( ) const

inline

Definition at line 55 of file MemoryLogger.h.

{
  return m_rss;
}

vmSize()

float Trk::MemoryLogger::vmSize ( ) const

inline

vsize/rss returnal

Definition at line 49 of file MemoryLogger.h.

{
  return m_vsize;
}

Member Data Documentation

m_rss

std::atomic<float> Trk::MemoryLogger::m_rss

mutableprivate

real memory size

Definition at line 45 of file MemoryLogger.h.

m_vsize

std::atomic<float> Trk::MemoryLogger::m_vsize

mutableprivate

virtual memory size

Definition at line 44 of file MemoryLogger.h.

---

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

• MemoryLogger.h
• MemoryLogger.cxx