TStopwatch Class Reference

Routines to benchmark table operations. More...

#include <util.h>

Public Types
enum	TExperiment {   LoadTables, Preprocess, ConstructGraph, Compute,   Postprocess, StoreOutputs, AllocateColumnCopies, CopyColumns,   Sort, Group, MergeNeighborhoods, AddNeighborhoods,   AddEdges, Sort2, ComputeOffset, ComputeETypes,   EstimateSizes, InitGraph, ExtractNbrETypes, CopyNodes,   PopulateGraph, ExtractEdges, BuildSubgraph }
	List of all experiments. More...

Public Member Functions
void	Start (const TExperiment Exp)
	Start a new experiment. More...
void	Stop (const TExperiment Exp)
	Stop the current experiment. More...
int	Cnt (const TExperiment Exp) const
	Returns the number of experiments. More...
double	Sum (const TExperiment Exp) const
	Returns the total time of all experiments. More...
double	Avg (const TExperiment Exp) const
	Returns the average time of all experiments. More...
double	Max (const TExperiment Exp) const
	Returns the maximum time of all experiments. More...
double	Min (const TExperiment Exp) const
	Returns the minimum time of all experiments. More...

Static Public Member Functions
static TStopwatch *	GetInstance ()

Static Public Attributes
static const int	NEXPS = 25
	The expected number of experiments (must be at least equal to the size of the above list) More...

Private Member Functions
	TStopwatch ()
	TStopwatch (TStopwatch const &)
void	operator= (TStopwatch const &)
double	Tick ()
	Routines to benchmark table operations. More...

Private Attributes
double	Starts [NEXPS]
int	Cnts [NEXPS]
double	Sums [NEXPS]
double	Maxs [NEXPS]
double	Mins [NEXPS]

Detailed Description

Routines to benchmark table operations.

Definition at line 71 of file util.h.

Member Enumeration Documentation

enum TStopwatch::TExperiment

List of all experiments.

Enumerator
LoadTables
Preprocess
ConstructGraph
Compute
Postprocess
StoreOutputs
AllocateColumnCopies
CopyColumns
Sort
Group
MergeNeighborhoods
AddNeighborhoods
AddEdges
Sort2
ComputeOffset
ComputeETypes
EstimateSizes
InitGraph
ExtractNbrETypes
CopyNodes
PopulateGraph
ExtractEdges
BuildSubgraph

Definition at line 74 of file util.h.

               {LoadTables, Preprocess, ConstructGraph, Compute, Postprocess, StoreOutputs,
      // graph construction
      AllocateColumnCopies, CopyColumns, Sort, Group, MergeNeighborhoods, AddNeighborhoods, AddEdges, Sort2, ComputeOffset,
      // subgraph construction
      ComputeETypes, EstimateSizes, InitGraph, ExtractNbrETypes, CopyNodes, PopulateGraph, ExtractEdges, BuildSubgraph} TExperiment;

Constructor & Destructor Documentation

TStopwatch::TStopwatch ( )

inlineprivate

Definition at line 88 of file util.h.

References Mins, and NEXPS.

               {
    for (int i = 0; i < NEXPS; i++) { Mins[i] = 100000000000.0; }
  }; // Constructor? (the {} brackets) are needed here.

TStopwatch::TStopwatch ( TStopwatch const &  )

private

Member Function Documentation

double TStopwatch::Avg

(

const TExperiment

Exp

)

const

Returns the average time of all experiments.

Definition at line 753 of file util.cpp.

                                          {

int TStopwatch::Cnt

(

const TExperiment

Exp

)

const

Returns the number of experiments.

Definition at line 745 of file util.cpp.

static TStopwatch* TStopwatch::GetInstance ( )

inlinestatic

Definition at line 82 of file util.h.

Referenced by TSnap::ToNetworkMP(), and TSnap::ToNetworkMP2().

                                   {
    static TStopwatch instance; // Guaranteed to be destroyed. Instantiated on first use.
    return &instance;
  }

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double TStopwatch::Max

(

const TExperiment

Exp

)

const

Returns the maximum time of all experiments.

Definition at line 757 of file util.cpp.

                    {

double TStopwatch::Min

(

const TExperiment

Exp

)

const

Returns the minimum time of all experiments.

Definition at line 761 of file util.cpp.

                    {
    nwritten = (int) write(fd, ptr, nleft);
    if (nwritten <= 0) {

void TStopwatch::operator= ( TStopwatch const &  )

private

void TStopwatch::Start

(

const TExperiment

Exp

)

Start a new experiment.

Definition at line 733 of file util.cpp.

Referenced by TSnap::ToNetworkMP(), and TSnap::ToNetworkMP2().

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void TStopwatch::Stop

(

const TExperiment

Exp

)

Stop the current experiment.

Definition at line 737 of file util.cpp.

Referenced by TSnap::ToNetworkMP(), and TSnap::ToNetworkMP2().

                                                  {
  return Sums[Exp] / Cnts[Exp];
}

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double TStopwatch::Sum

(

const TExperiment

Exp

)

const

Returns the total time of all experiments.

Definition at line 749 of file util.cpp.

                                          {

double TStopwatch::Tick ( )

private

Routines to benchmark table operations.

Definition at line 701 of file util.cpp.

                        {
  //return clock() / ((double)CLOCKS_PER_SEC);
#ifdef USE_OPENMP
  return omp_get_wtime();
#else
#ifdef GLib_WIN32
  return GetTickCount() / 1000.0;
#else
  struct rusage rusage;
  getrusage(RUSAGE_SELF, &rusage);

  float cputime =
  ((float) (rusage.ru_utime.tv_usec + rusage.ru_stime.tv_usec) / 1000000) +
  ((float) (rusage.ru_utime.tv_sec + rusage.ru_stime.tv_sec));
  return cputime;
#endif
#endif
}

void TStopwatch::Start(const TExperiment Exp) {
  Starts[Exp] = Tick();
}

void TStopwatch::Stop(const TExperiment Exp) {
  double Duration = Tick() - Starts[Exp];
  Sums[Exp] += Duration;
  Maxs[Exp] = Maxs[Exp] >= Duration ? Maxs[Exp] : Duration;
  Mins[Exp] = Mins[Exp] <= Duration ? Mins[Exp] : Duration;
  Cnts[Exp]++;
}

Member Data Documentation

int TStopwatch::Cnts[NEXPS]

private

Definition at line 99 of file util.h.

double TStopwatch::Maxs[NEXPS]

private

Definition at line 101 of file util.h.

double TStopwatch::Mins[NEXPS]

private

Definition at line 102 of file util.h.

Referenced by TStopwatch().

const int TStopwatch::NEXPS = 25

static

The expected number of experiments (must be at least equal to the size of the above list)

Definition at line 80 of file util.h.

Referenced by TStopwatch().

double TStopwatch::Starts[NEXPS]

private

Definition at line 98 of file util.h.

double TStopwatch::Sums[NEXPS]

private

Definition at line 100 of file util.h.

---

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

• snap-core/util.h
• snap-core/util.cpp