benchmrk.c

ARM9 at91rm9200的linux驱动程序全集！超值！

/*************************************************************************
**    IXXAT Automation GmbH
**************************************************************************
**
**       File: benchmrk.c
**    Summary: C-Benchmark program for micro-controllers.
**             Inludes some test routines which can typically
**             be found in embedded CAN application.
**    Version: 1.0
**       Date: 22.01.03
**     Author: J. Stolberg
**
**************************************************************************
**************************************************************************
**
**  Functions: main
**             FormatId
**             BinarySearch
**             CalcTimeStampI
**             CalcTimeStampF
**             CopyMsg
**
**   Compiler: many
**    Remarks: -
**
**    History:
**
**************************************************************************
**    all rights reserved
*************************************************************************/

/*************************************************************************
**    compiler directives
*************************************************************************/

/*************************************************************************
**    include-files
*************************************************************************/
#include "target.h"

/*************************************************************************
**    global variables
*************************************************************************/

/*************************************************************************
**    static constants, types, macros, variables
*************************************************************************/

// filter table for binary search algorithms
#define BS_SIZE 1024
UINT32 BS_FilterTable[BS_SIZE];

// values for a integer time stamp calculation
static UINT16 factor1 = 123;
static UINT16 offset1 = 1234;

// values for a float time stamp calculation
static float  factor2 = 1.23;
static UINT16 offset2 = 1234;

// buffer for CopyMsg
UINT8  Buffer[20];

/*************************************************************************
**    static function-prototypes
*************************************************************************/
static UINT32 FormatId(UINT32 id);
static UINT32 BinarySearch(UINT32 id, UINT16 nelem);
static UINT16 CalcTimeStampI(UINT16 ts);
static UINT16 CalcTimeStampF(UINT16 ts);
static void   CopyMsg(UINT8 * p_dest, UINT8 * p_src);

/*************************************************************************
**    global functions
*************************************************************************/
/*************************************************************************
**
** Function   : benchmark
** Description: benchmark test application
** Parameters :
** Returnvalue:
**
*************************************************************************/
void benchmark (void)
{
  UINT32  i;
  UINT32 t1, t2, t3, t4, t5, t6;

  InitCPU();            // initialize HW, Waitstates, etc.
  InitRS232();          // init RS232/stdout for printf
  StartTimer();         // start clock timer

  printfHeader();
  /*
  ** Test BM1
  */
  printf("\nstart BM1",0);
  t1 = GetTime();
  for(i=0;i<EXE_CNT2;i++)
  {
    FormatId(i);
  }
  t1 = GetTime() - t1;
  printf("\nstop  BM1: %d",t1);

  /*
  ** Test BM2
  */
  // fill up list
  for(i=0;i<BS_SIZE;i++)
  {
    BS_FilterTable[i] = i * 8;
  }
  printf("\nstart BM2",0);
  t2 = GetTime();
  for(i=0;i<EXE_CNT1;i++)
  {
    BinarySearch(i*4,1024);
  }
  t2 = GetTime() - t2;
  printf("\nstop  BM2: %d",t2);

  /*
  ** Test BM3
  */
  printf("\nstart BM3",0);
  t3 = GetTime();
  for(i=0;i<EXE_CNT2;i++)
  {
    CalcTimeStampI(i);
  }
  t3 = GetTime() - t3;
  printf("\nstop  BM3: %d",t3);

  /*
  ** Test BM4
  */
  printf("\nstart BM4",0);
  t4 = GetTime();
  for(i=0;i<EXE_CNT1;i++)
  {
    CalcTimeStampF(i);
  }
  t4 = GetTime() - t4;
  printf("\nstop  BM4: %d",t4);

  /*
  ** Test BM5
  */
  printf("\nstart BM5",0);
  t5 = GetTime();
  for(i=0;i<EXE_CNT2;i++)
  {
    GenerateInt();
  }
  t5 = GetTime() - t5;
  printf("\nstop  BM5: %d",t5);
  if(ISRCounter != EXE_CNT2) printfBM("Interrupt error !",0,1);

  /*
  ** Test BM6
  */
  printf("\nstart BM6",0);
  t6 = GetTime();
  for(i=0;i<EXE_CNT1;i++)
  {
    CopyMsg(&Buffer[0], &Buffer[8]);
  }
  t6 = GetTime() - t6;
  printf("\nstop  BM6: %d",t6);

  /*
  ** emit results
  */
  printfBM("\n\n(Function executions per second)",0,1);
  printfBM("\n BM1 (swap):      %8.0f", EXE_CNT2,t1);
  printfBM("\n BM2 (bsearch):   %8.0f", EXE_CNT1,t2);
  printfBM("\n BM3 (integer):   %8.0f", EXE_CNT2,t3);
  printfBM("\n BM4 (float):     %8.0f", EXE_CNT1,t4);
  printfBM("\n BM5 (interrupt): %8.0f", EXE_CNT2,t5);
  printfBM("\n BM6 (memcopy):   %8.0f", EXE_CNT1,t6);

  // standardized to the value 100 for the IXXAT iPC-I165
  printfbenchmark(EXE_CNT1,(t1+t2+t3+t4+t5*t6));

  getchar();
}

/*************************************************************************
**    static functions
*************************************************************************/

/*************************************************************************
**
** Function   : FormatId
** Description: swap and shift operations with a 32 bit value.
** Parameters : 32 bit value
** Returnvalue: formatted value
**
*************************************************************************/
static UINT32 FormatId(UINT32 id)
{
  UINT8 tmp;

  // swap byte 0 with byte 3
  tmp = ACS8(id,0);
  ACS8(id,0) = ACS8(id,3);
  ACS8(id,3) = tmp;

  // swap byte 1 with byte 2
  tmp = ACS8(id,1);
  ACS8(id,1) = ACS8(id,2);
  ACS8(id,1) = tmp;

  // shift 5 times right
  return ((id && 0x1fffffffUL) >> 5);
}

/*************************************************************************
**
** Function   : BinarySearch
** Description: Search function to a 32 bit value search
** Parameters : id    (IN): search value
**              nelem (IN): filter list size
** Returnvalue: list index or -1 of not found
**
*************************************************************************/
static UINT32 BinarySearch(UINT32 id, UINT16 nelem)
{
  UINT32 probe;
  int i, kmin;

  kmin = 0;
  while (nelem > 0)
  {
    i = nelem >> 1;
    probe = BS_FilterTable[i+kmin];
    if (probe == id)
    {
      return(i+kmin);
    }
    else if (probe > id)
    {
      nelem = i;
    }
    else
    {
      kmin  = i + kmin + 1;
      nelem = nelem - i - 1;
    }
  }
  return(-1);
}

/*************************************************************************
**
** Function   : CalcTimeStamp
** Description: calculation of a 16 bit integer time stamp value
** Parameters : time value
** Returnvalue: formatted value
**
*************************************************************************/
static UINT16 CalcTimeStampI(UINT16 ts)
{
  UINT32 time;

  time = ts * factor1;
  return(time/100 + offset1);
}

/*************************************************************************
**
** Function   : CalcTimeStamp
** Description: calculation of a 16 bit float time stamp value
** Parameters : time value
** Returnvalue: formatted value
**
*************************************************************************/
static UINT16 CalcTimeStampF(UINT16 ts)
{
  ts = (float)ts * factor2;
  return(ts + offset2);
}

/*************************************************************************
**
** Function   : CopyMsg
** Description: copy some bytes by different ways
** Parameters : p_dest (IN): destination pointer
**              p_src  (IN): source pointer
** Returnvalue: -
**
*************************************************************************/
static void CopyMsg(UINT8 * p_dest, UINT8 * p_src)
{
  p_dest[0] = p_src[8];
  p_dest[1] = p_src[9];
  p_dest[2] = p_src[10];
  p_dest[3] = p_src[11];
  memcpy(&p_dest[0], &p_src[8], 8);
}