problem with performance counter core

[Altera_Forum]

Hi everyone, I am a new to nios. I've been trying to get this code to work on the cyclone 2 development board that I have. I just don't know what is wrong. I cannot get any valid result from the performance counter core of altera. any suggestion is very helpful. 

  # include "alt_types.h"# include <stdio.h> /* This ert_main.c example uses printf/fflush */# include <unistd.h># include <altera_avalon_performance_counter.h> /*Use to measure code performance*/ # include "varipitch.h" /* Model&#39;s header file */# include "rtwtypes.h" /* MathWorks types */# define RATE0 1# define RATE1 2  extern const float GNC_input_table[33343][21];  static RT_MODEL_varipitch varipitch_M_; static RT_MODEL_varipitch *varipitch_M = &varipitch_M_;/* Real-time model */ static BlockIO_varipitch varipitch_B; /* Observable signals */ static D_Work_varipitch varipitch_DWork;/* Observable states */ static real32_T varipitch_U_Xe[3];  /* Root inport: &#39;<Root>/Xe&#39; */ static real32_T varipitch_U_Ve[3];  /* Root inport: &#39;<Root>/Ve&#39; */ static real32_T varipitch_U_p;  /* Root inport: &#39;<Root>/p&#39; */ static real32_T varipitch_U_dpdt;  /* Root inport: &#39;<Root>/dpdt&#39; */ static real32_T varipitch_U_Q6;  /* Root inport: &#39;<Root>/Q6&#39; */ static real32_T varipitch_U_Cdsin6;  /* Root inport: &#39;<Root>/Cdsin6&#39; */ static real32_T varipitch_U_Cmas6;  /* Root inport: &#39;<Root>/Cmas6&#39; */ static real32_T varipitch_U_Vb[3];  /* Root inport: &#39;<Root>/Vb&#39; */ static real32_T varipitch_U_mass_single;  /* Root inport: &#39;<Root>/mass&#39; */ static real32_T varipitch_U_ix_single;  /* Root inport: &#39;<Root>/ix&#39; */ static real32_T varipitch_U_iy_single;  /* Root inport: &#39;<Root>/iy&#39; */ static real32_T varipitch_U_cg_single;  /* Root inport: &#39;<Root>/cg&#39; */ static real32_T varipitch_U_winds_single[2];  /* Root inport: &#39;<Root>/winds&#39; */ static real32_T varipitch_U_clock_single;  /* Root inport: &#39;<Root>/clock&#39; */ static real32_T varipitch_Y_Mode;  /* Root outport: &#39;<Root>/Mode&#39; */ static real32_T varipitch_Y_CMDP;  /* Root outport: &#39;<Root>/CMDP&#39; */ static boolean_T OverrunFlags[2] = { 0, 0 };  DEFINITION OF MYFUNCTION1{} DEFINITION OF MYFUNCTION2{  PERF_BEGIN(PERFORMANCE_COUNTER_0_BASE, RATE1);   do something  PERF_END(PERFORMANCE_COUNTER_0_BASE, RATE1); }      int perf_print_my_formatted_report (void* perf_base, alt_u32 clock_freq_hertz) {    double total_usec;  alt_u64 total_clocks;  alt_u64 section_clocks;  int section_num = 1;   const char* separator = "+---------------+-----+------------+---------------+-----------+\n";  const char* column_header = "| Section | % | Time (usec)| Time (clocks)|Occurrences|\n";    total_clocks = perf_get_total_time (perf_base);  total_usec = ((double)total_clocks) / clock_freq_hertz *1000000;   // Print the total at the top:  printf ("--Performance Counter Report--\nTotal Time: %lld microseconds ",(alt_u64)total_usec);  printf ("(%llu clock-cycles)\n\n", total_clocks);  printf ("%s",separator);  printf ("%s",column_header);  printf ("%s",separator);   for (section_num = 1; section_num <= 2; section_num++)  {  section_clocks = perf_get_section_time (perf_base, section_num);   if (section_num == 1){  printf ("|rate0 ");}  else {  printf ("|rate1 ");}  printf ("|%5lld",(section_clocks * 100) / total_clocks); // %  printf ("|%12lld",(section_clocks*1000000) / clock_freq_hertz); // time (us)  printf ("|%15lld",section_clocks); // time (clocks)  printf ("|%11u", (unsigned int) perf_get_num_starts (perf_base, section_num)); // occurrences  printf ("|\n");  printf ("%s",separator);   }   return 0; } /* The example "main" function illustrates what is required by your  * application code to initialize, execute, and terminate the generated code.  * Attaching rt_OneStep to a real-time clock is target specific. This example  * illustates how you do this relative to initializing the model.  */ int main(int_T argc, const char_T *argv[]) {  /* Initialize model */  PERF_RESET(PERFORMANCE_COUNTER_0_BASE);  int_T count = 0;   FILE *model_out;  CALL MYFUNCTION1;   /* Attach rt_OneStep to a timer or interrupt service routine with  * period 0.0002 seconds (the model&#39;s base sample time) here. The  * call syntax for rt_OneStep is  *  * rt_OneStep(varipitch_M);  */  printf("Warning: The simulation will run forever. "  "Generated ERT main won&#39;t simulate model step behavior. "  "To change this behavior select the &#39;MAT-file logging&#39; option.\n");  fflush(NULL);  PERF_START_MEASURING(PERFORMANCE_COUNTER_0_BASE);  while(count < 1){  CALL MYFUNCTION2  PERF_BEGIN(PERFORMANCE_COUNTER_0_BASE, RATE0);   count++;  PERF_END(PERFORMANCE_COUNTER_0_BASE, RATE0);  }  PERF_STOP_MEASURING(PERFORMANCE_COUNTER_0_BASE);  perf_print_my_formatted_report((void*)PERFORMANCE_COUNTER_0_BASE, ALT_CPU_FREQ);  }  output capture from screen:   nios2-terminal: Warning: The JTAG cable you are using is not supported for Nios nios2-terminal: II systems. You may experience intermittent JTAG communication nios2-terminal: failures with this cable. Please use a USB Blaster revision B nios2-terminal: cable or another supported cable. Please refer to the file nios2-terminal: errata.txt included in the Nios II development kit documents nios2-terminal: directory for more information.  nios2-terminal: connected to hardware target using JTAG UART on cable nios2-terminal: "USB-Blaster [USB-0]", device 1, instance 0 nios2-terminal: (Use the IDE stop button or Ctrl-C to terminate)  Warning: The simulation will run forever. Generated ERT main won&#39;t simulate mode l step behavior. To change this behavior select the &#39;MAT-file logging&#39; option. I am loading --Performance Counter Report-- Total Time: 217020518514230016 microseconds (18446744073709551615 clock-cycles)  +---------------+-----+------------+---------------+-----------+ | Section | % | Time (usec)| Time (clocks)|Occurrences| +---------------+-----+------------+---------------+-----------+ |rate0 | 0|217020518514| -1| 4294967295| +---------------+-----+------------+---------------+-----------+ |rate1 | 0|217020518514| -1| 4294967295| +---------------+-----+------------+---------------+-----------+   I generated the C code from matlab embedded real time workshop so that&#39;s why there are funky type like char_T, int_T, real32_T. Those are just regulare char, int, double but typedef in rtwtypes.h.