PerfMon::MallocStats Class Reference

Access to some useful malloc statistics. More...

#include <MallocStats.h>

Collaboration diagram for PerfMon::MallocStats:

Public Types
typedef int	return_type

Public Member Functions
	MallocStats ()
	c-tor More...
void	refresh ()
	update cached informations about ,alloc statistics More...
return_type	from_system_nmmap ()
	Returns number of bytes allocated from system not including mmapped regions. More...
return_type	free_chunks ()
	Returns number of free chunks. More...
return_type	used ()
	Number of bytes allocated and in use. More...
return_type	not_used ()
	Number of bytes allocated but not in use. More...
return_type	releasable ()
	Top-most, releasable (via malloc_trim) space (bytes) More...
return_type	max_allocated ()
	Maximum total allocated space (bytes) (always 0 ?) More...
return_type	fastbin_blocks ()
	Number of fastbin blocks. More...
return_type	fastbin_free ()
	Space available in freed fastbin blocks (bytes) More...
return_type	from_system_mmap ()
	Returns number of bytes allocated from system using mmap. More...
return_type	mmap_chunks ()
	Number of chunks allocated via mmap() More...
return_type	from_system_total ()
	Returns total number of bytes allocated from system including mmapped regions. More...
std::string	repr ()
	display malloc stats More...
void	dump (std::ostream &out=std::cout)
	display malloc stats on std::cout More...

Private Attributes
PerfMon::mallinfo_t	m_infos

Detailed Description

Access to some useful malloc statistics.

malloc is default C++ allocator

Definition at line 26 of file MallocStats.h.

Member Typedef Documentation

return_type

typedef int PerfMon::MallocStats::return_type

Definition at line 36 of file MallocStats.h.

Constructor & Destructor Documentation

MallocStats()

PerfMon::MallocStats::MallocStats

(

)

c-tor

Definition at line 26 of file MallocStats.cxx.

                         :
  m_infos (PerfMon::mallinfo())
{}

Member Function Documentation

dump()

void PerfMon::MallocStats::dump

(

std::ostream &

out = std::cout

)

display malloc stats on std::cout

Definition at line 70 of file MallocStats.cxx.

{
  out << repr();
}

fastbin_blocks()

return_type PerfMon::MallocStats::fastbin_blocks ( )

inline

Number of fastbin blocks.

Definition at line 86 of file MallocStats.h.

  {
    refresh();
    return m_infos.smblks;
  }

fastbin_free()

return_type PerfMon::MallocStats::fastbin_free ( )

inline

Space available in freed fastbin blocks (bytes)

Definition at line 93 of file MallocStats.h.

  {
    refresh();
    return m_infos.fsmblks;
  }

free_chunks()

return_type PerfMon::MallocStats::free_chunks ( )

inline

Returns number of free chunks.

Definition at line 51 of file MallocStats.h.

  {
    refresh();
    return m_infos.ordblks;
  }

from_system_mmap()

return_type PerfMon::MallocStats::from_system_mmap ( )

inline

Returns number of bytes allocated from system using mmap.

Definition at line 100 of file MallocStats.h.

  {
    refresh();
    return m_infos.hblkhd;
  }

from_system_nmmap()

return_type PerfMon::MallocStats::from_system_nmmap ( )

inline

Returns number of bytes allocated from system not including mmapped regions.

Definition at line 44 of file MallocStats.h.

  {
    refresh();
    return m_infos.arena;
  }

from_system_total()

return_type PerfMon::MallocStats::from_system_total ( )

inline

Returns total number of bytes allocated from system including mmapped regions.

Definition at line 116 of file MallocStats.h.

  {
    refresh();
    return from_system_nmmap() + from_system_mmap();
  }

max_allocated()

return_type PerfMon::MallocStats::max_allocated ( )

inline

Maximum total allocated space (bytes) (always 0 ?)

Definition at line 79 of file MallocStats.h.

  {
    refresh();
    return m_infos.usmblks;
  }

mmap_chunks()

return_type PerfMon::MallocStats::mmap_chunks ( )

inline

Number of chunks allocated via mmap()

Definition at line 107 of file MallocStats.h.

  {
    refresh();
    return m_infos.hblks;
  }

not_used()

return_type PerfMon::MallocStats::not_used ( )

inline

Number of bytes allocated but not in use.

Definition at line 65 of file MallocStats.h.

  {
    refresh();
    return m_infos.fordblks;
  }

refresh()

void PerfMon::MallocStats::refresh ( )

inline

update cached informations about ,alloc statistics

Definition at line 40 of file MallocStats.h.

  { m_infos = PerfMon::mallinfo(); }

releasable()

return_type PerfMon::MallocStats::releasable ( )

inline

Top-most, releasable (via malloc_trim) space (bytes)

Definition at line 72 of file MallocStats.h.

  {
    refresh();
    return m_infos.keepcost;
  }

repr()

std::string PerfMon::MallocStats::repr

(

)

display malloc stats

Definition at line 37 of file MallocStats.cxx.

{
  std::ostringstream s;
  s << "MALLOC statistics\n"
    << "=================================================================\n"
    << "Space allocated from system not using mmap: " 
    << from_system_nmmap() << " bytes\n"
    << "       number of free chunks                       : " << free_chunks() 
    << "\n"
    << "       space allocated and in use                  : " << used() 
    << " bytes\n"
    << "       space allocated but not in use              : " << not_used()
    << " bytes\n"
    << "       top-most, releasable (via malloc_trim) space: " << releasable()
    << " bytes\n"
    << "       maximum total allocated space (?)           : " << max_allocated() 
    << " bytes\n"
    << "   FASTBIN blocks \n"
    << "       number of fastbin blocks: " << fastbin_blocks() << "\n"
    << "       space available in freed fastbin blocks: " << fastbin_free()
    << " bytes\n"
    << "Space allocated from system using mmap: " << from_system_mmap() 
    << " bytes\n"
    << "       number of chunks allocated via mmap(): " << mmap_chunks() 
    << "\n"
    << "Total space allocated from system (mmap and not mmap): " 
    << from_system_total() << " bytes\n"
    << "=================================================================\n"
    << std::flush;
  return s.str();
}

used()

return_type PerfMon::MallocStats::used ( )

inline

Number of bytes allocated and in use.

Definition at line 58 of file MallocStats.h.

  {
    refresh();
    return m_infos.uordblks;
  }

Member Data Documentation

m_infos

PerfMon::mallinfo_t PerfMon::MallocStats::m_infos

private

Definition at line 28 of file MallocStats.h.

---

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

• MallocStats.h
• MallocStats.cxx