#include <SimpleProfiler.h>

Public Types
typedef VoidVec::size_type	size_type
typedef std::vector< void * >	VoidVec
Public Member Functions
void	commitFrame (void first, void last)
void *	stackTop ()
void	start ()
void	stop ()
void **	tempStack ()
size_type	tempStackSize ()
Static Public Member Functions
static SimpleProfiler *	instance ()
Private Member Functions
void	complete ()
void	doWrite ()
	SimpleProfiler ()
	~SimpleProfiler ()
Private Attributes
void **	curr_
int	fd_
std::string	filename_
VoidVec	frame_data_
void **	high_water_
bool	installed_
pthread_t	owner_
bool	running_
void *	stacktop_
VoidVec	tmp_stack_
Static Private Attributes
static SimpleProfiler *	inst_ = 0
static boost::mutex	lock_

Detailed Description

Definition at line 12 of file SimpleProfiler.h.

Member Typedef Documentation

typedef VoidVec::size_type SimpleProfiler::size_type

Definition at line 16 of file SimpleProfiler.h.

typedef std::vector<void*> SimpleProfiler::VoidVec

Definition at line 15 of file SimpleProfiler.h.

Constructor & Destructor Documentation

SimpleProfiler::SimpleProfiler ( ) [private]

Definition at line 551 of file SimpleProfiler.cc.

References fd_, and filename_.

                              :
  frame_data_(10*1000*1000),
  tmp_stack_(1000),
  high_water_(&frame_data_[10*1000*1000-10*1000]),
  curr_(&frame_data_[0]),
  filename_(makeFileName()),
  fd_(open(filename_.c_str(),
           O_RDWR|O_CREAT,
           S_IRWXU|S_IRGRP|S_IROTH|S_IWGRP|S_IWOTH)),
  installed_(false),
  running_(false),
  owner_(),
  stacktop_(setStacktop()) {
  if(fd_ < 0) {
    std::ostringstream ost;
    ost << "failed to open profiler output file " << filename_;
    throw std::runtime_error(ost.str().c_str());
  }
  openCondFile();
}

SimpleProfiler::~SimpleProfiler ( ) [private]

Definition at line 572 of file SimpleProfiler.cc.

References dtNoiseDBValidation_cfg::cerr, filename_, and running_.

                                {
  if(running_) {
    std::cerr << "Warning: the profile timer was not stopped,\n"
              << "profiling data in " << filename_
              << " is probably incomplete and will not be processed\n";
  }
  closeCondFile();
}

Member Function Documentation

void SimpleProfiler::commitFrame	(	void **	first,
		void **	last
	)

Definition at line 581 of file SimpleProfiler.cc.

References filterCSVwithJSON::copy, curr_, doWrite(), and high_water_.

Referenced by sigFunc().

                                                          {
  void** cnt_ptr = curr_;
  *cnt_ptr = reinterpret_cast<void*>(std::distance(first, last));
  ++curr_;
  curr_ = std::copy(first, last, curr_);
  if(curr_ > high_water_) doWrite();
}

void SimpleProfiler::complete ( ) [private]

Definition at line 663 of file SimpleProfiler.cc.

References dtNoiseDBValidation_cfg::cerr, doWrite(), fd_, filename_, edmtest::makeFileName(), and writeProfileData().

Referenced by stop().

                              {
  doWrite();

  if(lseek(fd_, 0, SEEK_SET) < 0) {
      std::cerr << "SimpleProfiler: could not seek to the start of the profile\n"
                << " data file during completion.  Data will be lost.\n";
      return;
  }

  writeProfileData(fd_, filename_);
  write_maps();

  std::string totsname = makeFileName();
  totsname += "_sample_info";
  std::ofstream ost(totsname.c_str());

  ost << "samples_total " << samples_total << "\n"
      << "samples_missing_framepointer " << samples_missing_framepointer << "\n" ;
}

void SimpleProfiler::doWrite ( ) [private]

Definition at line 589 of file SimpleProfiler.cc.

References curr_, fd_, frame_data_, start(), and TablePrint::write.

Referenced by commitFrame(), and complete().

                             {
  void** start = &frame_data_[0];
  if(curr_ == start) return;
  unsigned int cnt = std::distance(start, curr_) * sizeof(void*);
  unsigned int totwr = 0;

  while(cnt>0 && (totwr = write(fd_, start, cnt)) != cnt) {
    if(totwr == 0)
      throw std::runtime_error("SimpleProfiler::doWrite wrote zero bytes");
    start += (totwr/sizeof(void*));
    cnt -= totwr;
  }

  curr_ = &frame_data_[0];
}

SimpleProfiler * SimpleProfiler::instance ( ) [static]

Definition at line 540 of file SimpleProfiler.cc.

References inst_, lock_, and AlCaHLTBitMon_ParallelJobs::p.

Referenced by sigFunc().

                                         {
  if(SimpleProfiler::inst_ == 0) {
      boost::mutex::scoped_lock sl(lock_);
      if(SimpleProfiler::inst_ == 0) {
          static SimpleProfiler p;
          SimpleProfiler::inst_ = &p;
      }
  }
  return SimpleProfiler::inst_;
}

void* SimpleProfiler::stackTop ( ) [inline]

Definition at line 23 of file SimpleProfiler.h.

References stacktop_.

{ return stacktop_; }

void SimpleProfiler::start ( void )

Definition at line 610 of file SimpleProfiler.cc.

References dtNoiseDBValidation_cfg::cerr, installed_, lock_, owner_, and running_.

Referenced by doWrite().

                           {
  {
    boost::mutex::scoped_lock sl(lock_);

    if(installed_) {
      std::cerr << "Warning: second thread " << pthread_self()
                << " requested the profiler timer and another thread\n"
                << owner_ << "has already started it.\n"
                << "Only one thread can do profiling at a time.\n"
                << "This second thread will not be profiled.\n";
      return;
    }

    installed_ = true;
  }

  owner_ = pthread_self();
  setupTimer();
  running_ = true;
}

void SimpleProfiler::stop ( )

Definition at line 632 of file SimpleProfiler.cc.

References dtNoiseDBValidation_cfg::cerr, complete(), installed_, owner_, and running_.

                          {
  if(!installed_) {
      std::cerr << "SimpleProfiler::stop - no timer installed to stop\n";
      return;
  }

  if(owner_ != pthread_self()) {
      std::cerr << "SimpleProfiler::stop - only owning thread can stop the timer\n";
      return;
  }

  if(!running_) {
      std::cerr << "SimpleProfiler::stop - no timer is running\n";
      return;
  }

  struct itimerval newval;

  newval.it_interval.tv_sec = 0;
  newval.it_interval.tv_usec = 0;
  newval.it_value.tv_sec = 0;
  newval.it_value.tv_usec = 0;

  if(setitimer(ITIMER_PROF, &newval, 0) != 0) {
      perror("setitimer call failed - could not stop the timer");
  }

  running_ = false;
  complete();
}