Programming NIOSII interfaced with custom component, using Avalon MM Interface

I used performance counter, but not able to see anything on the console. Not even the stuff which I was getting before adding the performance counter.

I followed the steps below:

1. Added Performance counter in Qsys Design.

2. Added Timer.

3. Used:

PERF_RESET();

PERF_START_MEASURING();

PERF_BEGIN();

// Here is the code block to be tested.

// I want to know the cycles consumed during this block.

PERF_END();

PERF_STOP_MEASURING();

perf_print_formatted_report();

Please help if i am missing anything in the process.