ProcStats Class Reference

#include <src/ProcStats.h>

Collaboration diagram for ProcStats:

Classes
struct	cleanup
class	unique_fd

Public Member Functions
bool	fetch (procInfo &fill_me)
double	pageSize () const

Static Public Member Functions
static ProcStats *	instance ()

Private Member Functions
	ProcStats ()

Private Attributes
unique_fd	fd
double	pg_size
procInfo	curr
std::string	fname
char	buf [500]
bool	valid

Static Private Attributes
static ProcStats *	inst = 0

Friends
struct	cleanup

Detailed Description

Definition at line 41 of file ProcStats.h.

Constructor & Destructor Documentation

ProcStats::ProcStats ( )

private

Definition at line 245 of file ProcStats.cpp.

                    :valid(false)
{
#ifdef __linux
  pg_size = sysconf(_SC_PAGESIZE); // getpagesize();

  fname = "/proc/" + std::to_string(getpid()) + "/stat"; 

  fd.open( fname.c_str(), O_RDONLY );
  if(!fd) 
  {
    cerr << "Failed to open " << fname << endl;
    return;
  }
#endif
  valid=true;
}

Member Function Documentation

bool ProcStats::fetch

(

procInfo &

fill_me

)

Definition at line 263 of file ProcStats.cpp.

{
  if( valid == false ) return false;

#ifdef __linux
  double pr_size, pr_rssize;
  linux_proc pinfo;
  int cnt;

  fd.lseek(0,SEEK_SET);

  if((cnt=fd.read(buf,sizeof(buf)))<0)
  {
    cout << "LINUX Read of Proc file failed:" << endl;
    return false;
  }

  if(cnt>0)
  {
    buf[cnt]='\0';

    sscanf(buf,
        //1  2  3  4  5  6  7  8  9  10  1   2   3   4   5   6   7   8   9   20  1   2   3   4   5   6   7   8   9   30  1   2   3   4   5
        "%d %s %c %d %d %d %d %d %lu %lu %lu %lu %lu %lu %lu %ld %ld %ld %ld %ld %ld %llu %lu %ld %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu",
        &pinfo.pid,
        pinfo.comm,
        &pinfo.state,
        &pinfo.ppid,
        &pinfo.pgrp,
        &pinfo.session,
        &pinfo.tty,
        &pinfo.tpgid,
        &pinfo.flags,
        &pinfo.minflt,
        &pinfo.cminflt,
        &pinfo.majflt,
        &pinfo.cmajflt,
        &pinfo.utime,
        &pinfo.stime,
        &pinfo.cutime,
        &pinfo.cstime,
        &pinfo.priority,
        &pinfo.nice,
        &pinfo.num_threads,
        &pinfo.itrealvalue,
        &pinfo.starttime,
        &pinfo.vsize,
        &pinfo.rss,
        &pinfo.rlim,
        &pinfo.startcode,
        &pinfo.endcode,
        &pinfo.startstack,
        &pinfo.kstkesp,
        &pinfo.kstkeip,
        &pinfo.signal,
        &pinfo.blocked,
        &pinfo.sigignore,
        &pinfo.sigcatch,
        &pinfo.wchan
        );

      // resident set size in pages
    pr_size = (double)pinfo.vsize;
    pr_rssize = (double)pinfo.rss;

    f.vsize = pr_size   / (1024*1024);
    f.rss   = pr_rssize * pg_size / (1024*1024);
  }

#else
  f.vsize = 0;
  f.rss   = 0;
#endif

  bool rc = (curr==f)?false:true;

  curr.rss=f.rss;
  curr.vsize=f.vsize;

  return rc;
}

ProcStats * ProcStats::instance ( )

static

Definition at line 237 of file ProcStats.cpp.

                               {
  static cleanup c;
  if(!inst) inst = new ProcStats;
  return inst;
}

double ProcStats::pageSize ( ) const

inline

Definition at line 47 of file ProcStats.h.

{ return pg_size; }

Friends And Related Function Documentation

friend struct cleanup

friend

Definition at line 58 of file ProcStats.h.

Member Data Documentation

char ProcStats::buf[500]

private

Definition at line 91 of file ProcStats.h.

procInfo ProcStats::curr

private

Definition at line 89 of file ProcStats.h.

unique_fd ProcStats::fd

private

Definition at line 87 of file ProcStats.h.

std::string ProcStats::fname

private

Definition at line 90 of file ProcStats.h.

ProcStats * ProcStats::inst = 0

staticprivate

Definition at line 94 of file ProcStats.h.

double ProcStats::pg_size

private

Definition at line 88 of file ProcStats.h.

bool ProcStats::valid

private

Definition at line 92 of file ProcStats.h.

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

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