Cycle Count for SC573-Cortex A5 processor

I tried to get the cycle count for ADSP-SC573 -ARM in different ways. But i got  cycle count=0 for every case.  Listing out the different ways i tested for the same.

1. Using Core Cycle-Counting Macros defined in cycle_count.h

   #include <cycle_count.h>

   #include<stdio.h>
   #include<stdlib.h>

   int main()
   {

   int i;

   cycle_stats_t CyclsTst;

   CYCLES_INIT(CyclsTst);
   CYCLES_START(CyclsTst);
   for (i=0;i<500;i++)
   {
   int c1=1,a=5,c2=2,b=10,sum;
   sum = (c1*a)+(c2*b);
   }

   CYCLES_STOP(CyclsTst);

   CYCLES_STOP(CyclsTst);
   printf("\n=========Print cycle count values=========\n");
   CYCLES_PRINT(CyclsTst);

   return 0;

   }

2. Using A5_PMU source files which is attached in EngineerZone discussion:ADSP-SC58x/2158x PMU Overflow Interrupt- Example code 

   #include<stdio.h>
   #include<stdlib.h>

   int main()
   {

   A5_Start_Cycle_Count();
   printf("Read Cycle_Count = %d\n", A5_Read_Cycle_Count());

   int i;
   for (i=0;i<500;i++)
   {
   int c1=1,a=5,c2=2,b=10,sum;
   sum = (c1*a)+(c2*b);
   }

   A5_Stop_Cycle_Count();

   
   printf("Read Cycle_Count = %d\n", A5_Read_Cycle_Count());

   return 0;

   }

3. Using example code downloaded from ARM community: DS-5 Development Studio | Using the PMU Event Counters in DS-5 – Arm Developer 

   #include<stdio.h>
   #include<stdlib.h>

   int main()
   {

   int i;
   start_counters(); //Configure and Start the counters

   for (i=0;i<500;i++)
   {
   int c1=1,a=5,c2=2,b=10,sum;
   sum = (c1*a)+(c2*b);
   }

   stop_counters(); //Stop the counters

   
   printf("\nPerformance monitor results\n\n");
   printf("Instructions Executed = %u\n", read_pmn(0) );
   printf("Cycle Count (CCNT) = %u\n", read_ccnt() );
   printf("Data Accesses = %u\n", read_pmn(1) );
   printf("Data Reads = %u\n", read_pmn(2) );
   printf("Data Writes = %u\n", read_pmn(3) );
   inst=read_pmn(0);
   cycl=read_ccnt();
   cycl_inst=cycl/inst;
   printf("Average cycles per instruction = %f\n",cycl_inst);

   return 0;
   }

For all the above codes i am getting cycle count as 0. I am using QEMU(Debug Configuration used :- Application with GDB and QEMU(Simulator) ) simulator to view the output.