Centre Blaise Pascal » Bench4GPU

/*

   Performs matrix multiply

   Thanks for help from aurel32@debian.org

*/

#include <stdio.h>

#include <math.h>

#include <stdlib.h>

#include <sys/time.h>

#include <string.h>

#ifdef CUFFT

#include <complex.h>

#include <cufft.h>

#else

#include <fftw3.h>

#endif

#ifdef DOUBLE

#define LENGTH double

#else

#define LENGTH float

#endif

// kind of plan estimations for FFTW3

#define ESTIMATE 1

#define MEASURE 2

#define PATIENT 3

#define EXHAUSTIVE 4

// Default values

#define NTHREADS 1

#define NLOOPS 10

#define DIMENSION 1024

// Redefine FFTW function calls

#ifdef FLOAT

#define FFTW_COMPLEX fftwf_complex

#define FFTW_PLAN fftwf_plan

#define FFTW_INIT_THREADS fftwf_init_threads

#define FFTW_PLAN_WITH_NTHREADS fftwf_plan_with_nthreads

#define FFTW_MALLOC fftwf_malloc

#define        FFTW_PLAN_DFT_2D fftwf_plan_dft_2d

#define FFTW_EXECUTE fftwf_execute

#define FFTW_DESTROY_PLAN fftwf_destroy_plan

#define FFTW_FREE fftwf_free

#elif DOUBLE

#define FFTW_COMPLEX fftw_complex

#define FFTW_PLAN fftw_plan

#define FFTW_INIT_THREADS fftw_init_threads

#define FFTW_PLAN_WITH_NTHREADS fftw_plan_with_nthreads

#define FFTW_MALLOC fftw_malloc

#define        FFTW_PLAN_DFT_2D fftw_plan_dft_2d

#define FFTW_EXECUTE fftw_execute

#define FFTW_DESTROY_PLAN fftw_destroy_plan

#define FFTW_FREE fftw_free

#endif

int main(int argc,char **argv)

{

  int i;

  int nloops=NLOOPS,nthreads=NTHREADS,size;

  int type_plan=0;

  double dplan=0.,dcompute=0.;

  struct timeval tv1,tv2;

  struct timezone tz;

  if ((argc==1)||

      (strcmp(argv[1],"-h")==0)||

      (strcmp(argv[1],"--help")==0))

    {

      printf("\n\tCalculate fake FFTW images\n\n"

             "\tParameters to give :\n\n"

             "\t1> Plan ESTIMATE MEASURE PATIENT EXHAUSTIVE\n"

             "\t2> Size of Image (2^n)\n"

             "\t3> Number of Loops (integer)\n"

             "\t4> Number of Threads (integer)\n\n");

      return(0);

    }

  // initialization of FFTW threads

  if (atoi(argv[4])<1) {

    nthreads=1;

  }

  else {

    nthreads=atoi(argv[4]);

  }

  if (atoi(argv[3])<1) {

    nloops=1;

  }

  else {

    nloops=atoi(argv[3]);

  }

  if (atoi(argv[2])<1) {

    size=2;

  }

  else {

    size=atoi(argv[2]);

  }

  printf("%i %i\n",size,nthreads);

#ifdef CUFFT

  cufftHandle plan;

  cufftComplex *in, *devin;

  size_t arraySize = sizeof(cufftComplex)*size*size;

  cudaMallocHost((void**) &in, arraySize);

  cudaMalloc((void**) &devin, arraySize);

  // initialisation of arrays

  for (i = 0; i < size*size; i++) {

    in[i].x=1.;

    in[i].y=0.;

  }

  in[0].x=1.;

  in[0].y=0.;

  // First timer to start plan

  gettimeofday(&tv1, &tz);

  // Plan & copy to device

  cufftPlan2d(&plan, size, size, CUFFT_C2C);

  cudaMemcpy(devin, in, arraySize, cudaMemcpyHostToDevice);

  // Second timer to end plan

  gettimeofday(&tv2, &tz);

  dplan=(double)((tv2.tv_sec-tv1.tv_sec) * 1000000L +                \

                     (tv2.tv_usec-tv1.tv_usec))/1000000.;

  // First timer to start process

  gettimeofday(&tv1, &tz);

  // Process

  for (i=0;i<nloops;i++) {

    cufftExecC2C(plan, devin, devin, CUFFT_FORWARD);

  }

  cudaMemcpy(in, devin, arraySize, cudaMemcpyDeviceToHost);

  printf("%i=%f,%f\n",0,in[0].x,in[0].y);

  // Second timer to end process

  gettimeofday(&tv2, &tz);

  cufftDestroy(plan);

  cudaFreeHost(in);

  cudaFree(devin);

#elif FFTW3

  FFTW_COMPLEX *in;

  FFTW_PLAN p;

  FFTW_INIT_THREADS();

  FFTW_PLAN_WITH_NTHREADS(nthreads);

  in = (FFTW_COMPLEX*) FFTW_MALLOC(sizeof(FFTW_COMPLEX)*size*size);

  // First timer to start plan

  gettimeofday(&tv1, &tz);

  if (strcmp(argv[1],"MEASURE")==0) {

    p = FFTW_PLAN_DFT_2D(size,size,in,in,FFTW_FORWARD,FFTW_MEASURE);

    type_plan=MEASURE;

  }

  if (strcmp(argv[1],"PATIENT")==0) {

    p = FFTW_PLAN_DFT_2D(size,size,in,in,FFTW_FORWARD,FFTW_PATIENT);

    type_plan=PATIENT;

  }

  if (strcmp(argv[1],"EXHAUSTIVE")==0) {

    p = FFTW_PLAN_DFT_2D(size,size,in,in,FFTW_FORWARD,FFTW_EXHAUSTIVE);

    type_plan=EXHAUSTIVE;

  }

  if ((type_plan==0)||(strcmp(argv[1],"ESTIMATE")==0)) {

    p = FFTW_PLAN_DFT_2D(size,size,in,in,FFTW_FORWARD,FFTW_ESTIMATE);

    type_plan=ESTIMATE;

  }

  // Second timer to end plan

  gettimeofday(&tv2, &tz);

  dplan=(double)((tv2.tv_sec-tv1.tv_sec) * 1000000L +                \

                 (tv2.tv_usec-tv1.tv_usec))/1000000.;

  // initialisation of arrays

  for (i = 0; i < size*size; i++) {

    (in[i])[0]=0.;

    (in[i])[1]=0.;

  }

  (in[0])[0]=1.;

  (in[0])[1]=0.;

  // First timer to start process

  gettimeofday(&tv1, &tz);

  for (i=0;i<nloops;i++) {

    FFTW_EXECUTE(p);

  }

  // Second timer to end process

  gettimeofday(&tv2, &tz);

  FFTW_DESTROY_PLAN(p);

  FFTW_FREE(in);

#endif

  dcompute=(double)((tv2.tv_sec-tv1.tv_sec) * 1000000L +                \

                    (tv2.tv_usec-tv1.tv_usec))/1000000./(double)nloops;

  printf("%s,%i,%i,%i,%i,%lf,%lf\n",argv[1],

         size,size,nthreads,nloops,dplan,dcompute);

  /* if ((file=fopen(argv[7],"a"))==NULL) */

  /*         { */

  /*           printf("Impossible to append result in %s file\n", */

  /*                  argv[7]); */

  /*           return(0); */

  /*         } */

  /* fprintf(file,"%s,%i,%i,%i,%i,%lf,%lf\n", */

  /*           argv[1],size,size,nthreads,nloops,dplan,dcompute); */

  /* fclose(file); */

  return 0;

}