Programming NIOSII interfaced with custom component, using Avalon MM Interface

I have used performance counter long time ago.Its look like that you are doing the same thing. Here is my code

PERF_RESET(PERFORMANCE_COUNTER_0_BASE);

PERF_START_MEASURING(PERFORMANCE_COUNTER_0_BASE);

PERF_BEGIN(PERFORMANCE_COUNTER_0_BASE,1);

// Here is the code block to be tested.

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

PERF_END(PERFORMANCE_COUNTER_0_BASE,1);

int cycles = IORD(PERFORMANCE_COUNTER_0_BASE,4); //Read the value of counter.Note that offset is set to 4.

If it is not working then your should design counter in your custom component and read it using avalon interface for the quick solution.