Simple tool for performance measuring. More...

Public Member Functions
void	tic ()
	Start timer. More...

void	toc ()
	Stop timer. More...

double	diff () const
	Return time in seconds elapsed between tic and toc. More...

Detailed Description

Simple tool for performance measuring.

The implementation of this class is chosen with compile-time MACROS THRUST_DEVICE_SYSTEM and MPI_VERSION.

dg::Timer t;
t.tic();
some_function_to_benchmark();
t.toc();
std::cout << "Function took "<<t.diff()<<"s\n";

Member Function Documentation

◆ diff()

double dg::Timer::diff ( ) const

Return time in seconds elapsed between tic and toc.

Returns: Time in seconds between calls of tic and toc

◆ tic()

void dg::Timer::tic ( )

Start timer.

uses omp_get_wtime() if available, else gettimeofday. If compiled with nvcc we place cudaEvent_t in the gpu stream. The mpi version places an MPI_Barrier(MPI_COMM_WORLD) and then uses MPI_Wtime. MPI + Cuda adds an additional cudaDeviceSynchronize

◆ toc()

void dg::Timer::toc ( )

Stop timer.