Timing.cpp

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//====================================================================
//  Timing.cpp
//--------------------------------------------------------------------
//
//  Package    : System (The LHCb System service)
//
//  Description: Implementation of Systems internals
//
//  Author     : M.Frank
//  Created    : 13/1/99
//  Changes    :
//====================================================================
#define GAUDIKERNEL_TIMING_CPP

#include "GaudiKernel/Timing.h"
#include "ProcessDescriptor.h"

#include <ctime>
#include <climits>
#ifdef _WIN32
#include <windows.h>
#else
#include <sys/time.h>
#include <sys/times.h>
#include <unistd.h>
#endif

#ifdef _WIN32
static const longlong UNIX_BASE_TIME = 116444736000000000;
#else
static const longlong UNIX_BASE_TIME = 0;
#endif

// convert time from internal representation to the appropriate type
// Internal representation for WIN32: 100 nanosecond intervals
//                             Unix:    1 clock tick (usually 10 milliseconds)
longlong System::adjustTime(TimeType typ, longlong t)   {
  if ( t != -1 )   {
#ifndef _WIN32
    //  t /= CLK_TCK ;     // needs division by clock tick unit

#endif
    switch( typ )   {
    case Year    :  return adjustTime<Year    >(t);
    case Month   :  return adjustTime<Month   >(t);
    case Day     :  return adjustTime<Day     >(t);
    case Hour    :  return adjustTime<Hour    >(t);
    case Min     :  return adjustTime<Min     >(t);
    case Sec     :  return adjustTime<Sec     >(t);
    case milliSec:  return adjustTime<milliSec>(t);
    case microSec:  return adjustTime<microSec>(t);
    case nanoSec :  return adjustTime<nanoSec >(t);
    case Native  :  return adjustTime<Native  >(t);
    }
  }
  return t;
}

longlong System::tickCount()    {
  longlong count = 10000;
#ifdef _WIN32
  count *= ::GetTickCount(); // Number of milliSec since system startup
#else
  struct tms buf;
  count *= 10*times(&buf);
#endif
  return count;
}

#include <iostream>

longlong System::currentTime(TimeType typ)    {
  switch( typ )   {
  case Year    :  return currentTime<Year    >();
  case Month   :  return currentTime<Month   >();
  case Day     :  return currentTime<Day     >();
  case Hour    :  return currentTime<Hour    >();
  case Min     :  return currentTime<Min     >();
  case Sec     :  return currentTime<Sec     >();
  case milliSec:  return currentTime<milliSec>();
  case microSec:  return currentTime<microSec>();
  case nanoSec :  return currentTime<nanoSec >();
  case Native  :  return currentTime<Native  >();
  }
  return currentTime<Native>();
}

longlong System::systemStart(TimeType typ)    {
  static longlong sys_start = 0;
  if ( 0 == sys_start )   {
    longlong c = currentTime(microSec);
    longlong t = tickCount();
    sys_start = 10*c - t;
  }
  return adjustTime(typ, sys_start);
}

longlong System::upTime(TimeType typ)    {
  static longlong sys_start = 10*systemStart(microSec);
  return adjustTime(typ, 10*currentTime(microSec)-sys_start);
}

longlong System::creationTime(TimeType typ, InfoType fetch, long pid)   {
  longlong created = 0;
  KERNEL_USER_TIMES info;
  if ( fetch != NoFetch && getProcess()->query(pid, fetch, &info) )   {
    created = adjustTime(typ, info.CreateTime-UNIX_BASE_TIME);
  }
  return created;
}

longlong System::remainingTime(TimeType typ, InfoType fetch, long pid)   {
  longlong left = 0;
  QUOTA_LIMITS quota;
  if ( fetch != NoFetch && getProcess()->query(pid, fetch, &quota) )   {
    if ( left == -1 )     {
      //left = _I64_MAX;
    }
    else  {
      left = adjustTime(typ, quota.TimeLimit);
    }
  }
  return left;
}

longlong System::ellapsedTime(TimeType typ, InfoType fetch, long pid) {
  KERNEL_USER_TIMES info;
  longlong ellapsed = currentTime(microSec)*10;
  getProcess()->query(pid, fetch, &info);
  ellapsed = adjustTime(typ, ellapsed+UNIX_BASE_TIME-info.CreateTime);
  return ellapsed;
}

longlong System::kernelTime(TimeType typ, InfoType fetch, long pid) {
  KERNEL_USER_TIMES info;
  longlong kerneltime = 0;
  if ( fetch != NoFetch && getProcess()->query(pid, fetch, &info) )   {
    kerneltime = adjustTime(typ, info.KernelTime );
  }
  return kerneltime;
}

longlong System::userTime(TimeType typ, InfoType fetch, long pid) {
  longlong usertime = 0;
  KERNEL_USER_TIMES info;
  if ( fetch != NoFetch && getProcess()->query(pid, fetch, &info) )   {
    usertime = adjustTime(typ, info.UserTime );
  }
  return usertime;
}

longlong System::cpuTime(TimeType typ, InfoType fetch, long pid) {
  longlong cputime = 0;
  KERNEL_USER_TIMES info;
  if ( fetch != NoFetch && getProcess()->query(pid, fetch, &info) )   {
    cputime = adjustTime(typ, info.KernelTime+info.UserTime );
  }
  return cputime;
}

namespace System {
  ProcessTime getProcessTime(long pid) {
    KERNEL_USER_TIMES info;
    if (getProcess()->query(pid, Times, &info)) {
      return ProcessTime(info.KernelTime,
                         info.UserTime,
                         currentTime<Native>() - info.CreateTime);
    }
    return ProcessTime(); // return 0s in case of problems
  }
}