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fftw_setup.c
Go to the documentation of this file.00001 #include <stdio.h>
00002 #include "fftw.h"
00003 #include "mrilib.h"
00004
00005
00006
00007 int main( int argc , char * argv[] )
00008 {
00009 fftw_plan p ;
00010 char fname[1024]="\0" , *w ;
00011 int ii , len[] = { 1024 , 3600 , 784 , 2000 , 864 , 0 } ;
00012 double cpu_old , cpu_new ;
00013
00014 cpu_old = COX_cpu_time() ;
00015 for( ii=0 ; len[ii] > 1 ; ii++ ){
00016 fprintf(stderr,"FFTW calibrating N=%5d",len[ii]) ; fflush(stdout) ;
00017 p = fftw_create_plan(len[ii], FFTW_FORWARD , FFTW_MEASURE|FFTW_USE_WISDOM);
00018 fftw_destroy_plan(p) ;
00019 fprintf(stderr,".") ; fflush(stdout) ;
00020 p = fftw_create_plan(len[ii], FFTW_BACKWARD, FFTW_MEASURE|FFTW_USE_WISDOM);
00021 fftw_destroy_plan(p) ;
00022 fprintf(stderr,".") ; fflush(stdout) ;
00023 cpu_new = COX_cpu_time() ;
00024 fprintf(stderr," %.2f CPU s\n",cpu_new-cpu_old) ; cpu_old = cpu_new ;
00025 }
00026
00027 w = fftw_export_wisdom_to_string() ;
00028 printf("%s\n",w) ;
00029 fftw_free(w) ;
00030 exit(0) ;
00031 }
