【贝能高性价比ATSAMD51评估板】基准性能测试之二:浮点计算能力whetstone

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【贝能高性价比ATSAMD51评估板】基准性能测试之二:浮点计算能力whetstone [复制链接]

前言

上一篇我们使用Dhrystone进行了整数运算性能的测试。这次我们使用whetstone进行浮点相关的计算性能测试。

过程

添加代码

获取代码

http://www.roylongbottom.org.uk/classic_benchmarks.tar.gz

解压classic_benchmarks.tar.gz将\classic_benchmarks\classic_benchmarks\source_code\whetstone文件夹复制到自己的工程。

添加代码

 

将\classic_benchmarks\source_code\whetstone文件夹复制到工程目录，并添加工程中

 

 

移植接口

whets.c中

 

161行 **************************************************************************

改为

 **************************************************************************/

 

167行注释掉

 //#include "cpuidh.h"

 

201行int main(int argc, char *argv[])

改为

int whets_main(int argc, char *argv[])

 

212行

int nopause = 1;

改为

    int nopause = 0;

 

注释掉228行以下内容

#if 0

    getDetails();

    for (i=1; i<10; i++)

    {

        printf("%s\n", configdata);

    }

 

    local_time();

    printf("\n");

    printf("##########################################\n");

    printf("%s Precision C Whetstone Benchmark %s, %s\n", Precision, opt, timeday);

 

    outfile = fopen("whets.txt","a+");

    if (outfile == NULL)

      {

       printf ("Cannot open results file \n\n");

       printf("Press Enter to exit\n");

       i = getchar();

 

       exit (0);

      }

      #endif

 

注释掉314行以下内容

#if 0

 fprintf (outfile, "\n");

 fprintf (outfile, "##############################################\n\n");

 for (i=1; i<10; i++)

 {

     fprintf(outfile, "%s \n", configdata);

 }

 fprintf (outfile, "\n");

 fprintf (outfile, "##############################################\n\n");

 fprintf (outfile, "Whetstone %s Precision C Benchmark  %s, %s\n",Precision, opt, timeday);

 fprintf (outfile, "\n");

 

 fprintf (outfile,"Loop content                   Result"

            "              MFLOPS      MOPS   Seconds\n\n");

 

 for (section=1; section<9; section++)

    {

     fprintf (outfile, "%s  %24.17f   ", headings[section],

                                              results[section]);

     if (loop_mops[section] == 99999)

       {          

        fprintf (outfile,"  %9.3f           %9.3f\n",

                 loop_mflops[section], loop_time[section]);

       }

       else

       {       

        fprintf (outfile, "            %9.3f %9.3f\n",

             loop_mops[section], loop_time[section], results[section]);

       }

    }

 fflush(outfile);

 fprintf (outfile, "\nMWIPS             ");

 fprintf (outfile, "%39.3f%20.3f\n\n",mwips,TimeUsed);

 fprintf (outfile, "Results  to  load  to  spreadsheet   ");

 fprintf (outfile, "     MWIPS   Mflops1   Mflops2   Mflops3   Cosmops"

                      "   Expmops  Fixpmops    Ifmops    Eqmops\n");

 fprintf (outfile, "Results  to  load  to  spreadsheet   ");   

                

 fprintf (outfile, " %9.3f %9.3f %9.3f", mwips, loop_mflops[1],

                                                         loop_mflops[2]);

 

 fprintf (outfile, " %9.3f %9.3f %9.3f", loop_mflops[6],

                                             loop_mops[5], loop_mops[8]);

 fprintf (outfile, " %9.3f %9.3f %9.3f\n\n", loop_mops[4],

                                              loop_mops[3], loop_mops[7]);

 fflush(outfile);

 

    

 fclose (outfile);

 

 printf ("\n");

 printf ("A new results file, whets.txt,  will have been created in the same\n");

 printf ("directory as the .EXE files, if one did not already exist.\n\n");

 

 if (nopause)

 {

    printf(" Press Enter\n\n");

    i = getchar();

 }  

 #endif

 

 

407行

start_time();改为

uint32_t s_stime_u32 = SYSTICK_GetTickCounter();

 

 

423行

end_time();改为

uint32_t s_etime_u32 = SYSTICK_GetTickCounter();

 

其他地方类似不再枚举

 

包含头文件

#include "definitions.h"

 

 

 

测试

main.c中

申明 void whets_main (int argc, char *argv[]);

 

int main ( void )

{

    /* Initialize all modules */

    SYS_Initialize ( NULL );

  SYSTICK_TimerStart();

    PORT_REGS->GROUP[1].PORT_PINCFG[24] = 0x1U;

    PORT_REGS->GROUP[1].PORT_PINCFG[25] = 0x1U;

    PORT_REGS->GROUP[1].PORT_PMUX[12] = 0x33U;

  whets_main(0,0);

    while ( true )

    {

        /* Maintain state machines of all polled MPLAB Harmony modules. */

        SYS_Tasks ( );

    }

 

    /* Execution should not come here during normal operation */

 

    return ( EXIT_FAILURE );

}

 

 

可以从以下地址对比，可以看到和80486DX2差不多

http://www.roylongbottom.org.uk/whetstone%20results.htm

 

 

 

总结

本文进行了浮点数运算性能测试，也和其他芯片对比，可以横向参考下芯片的性能。