CarmaTimer Class Reference

a simple timer for CUDA kernel. More...

#include <carma_timer.h>

Collaboration diagram for CarmaTimer:

Public Member Functions
	CarmaTimer ()
	~CarmaTimer ()
void	start ()
void	reset ()
void	stop ()
void	set_stream (cudaStream_t newStream)
double	elapsed ()

Protected Attributes
cudaEvent_t	start_event
cudaEvent_t	stop_event
cudaStream_t	stream = 0
double	total_time

Detailed Description

a simple timer for CUDA kernel.

this class provides the timer features to CarmaObj

Author

COMPASS Team https://github.com/ANR-COMPASS

Version

5.0.0

Date

2011/01/28

Copyright

GNU Lesser General Public License

Definition at line 52 of file carma_timer.h.

Constructor & Destructor Documentation

CarmaTimer()

CarmaTimer::CarmaTimer

(

)

Definition at line 59 of file carma_timer.h.

               {
    carma_safe_call(cudaEventCreate(&start_event));
    carma_safe_call(cudaEventCreate(&stop_event));
    total_time = 0.0;
  }

~CarmaTimer()

CarmaTimer::~CarmaTimer

(

)

Definition at line 65 of file carma_timer.h.

                {
    cudaEventDestroy(start_event);
    cudaEventDestroy(stop_event);
  }

Member Function Documentation

elapsed()

double CarmaTimer::elapsed

(

)

return elapsed time in seconds (as record in total_time)

Definition at line 85 of file carma_timer.h.

{ return total_time; }

reset()

void CarmaTimer::reset

(

)

Definition at line 72 of file carma_timer.h.

{ total_time = 0.0; }

set_stream()

void CarmaTimer::set_stream

(

cudaStream_t

newStream

)

Definition at line 83 of file carma_timer.h.

{ stream = newStream; }

start()

void CarmaTimer::start

(

)

Definition at line 70 of file carma_timer.h.

{ carma_safe_call(cudaEventRecord(start_event, stream)); }

stop()

void CarmaTimer::stop

(

)

stop timer and accumulate time in seconds

Definition at line 75 of file carma_timer.h.

              {
    float gpuTime;
    carma_safe_call(cudaEventRecord(stop_event, stream));
    carma_safe_call(cudaEventSynchronize(stop_event));
    carma_safe_call(cudaEventElapsedTime(&gpuTime, start_event, stop_event));
    total_time += (double)1e-3 * gpuTime;
  }

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Member Data Documentation

start_event

cudaEvent_t CarmaTimer::start_event

protected

Definition at line 54 of file carma_timer.h.

stop_event

cudaEvent_t CarmaTimer::stop_event

protected

Definition at line 54 of file carma_timer.h.

stream

cudaStream_t CarmaTimer::stream = 0

protected

Definition at line 55 of file carma_timer.h.

total_time

double CarmaTimer::total_time

protected

Definition at line 56 of file carma_timer.h.

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

• carma_timer.h