adam.dabrowski

I am trying to measure performance of my app. Starting with a modified hello_world demo, I try to read the rdcycle counter as defined in RISC-V specification:

unsigned long read_cycles(void)
{
unsigned long cycles
asm volatile ("rdcycle %0" : "=r" (cycles));
return cycles;
}

However, the value is always zero. Looking at the CSR…[Read more]