Is there any possible way to detect the accurate clock cycle of memory access or calculation for performing some algorithms in Nios II processor?

Hi,

1. The number of instructions which take more than one clock cycle is determined by the complexity of the ALU and its pipelining architecture. Therefore, the minimum and maximum cycles per instruction depend on the core you choose (Nios® II/f, Nios II/s, Nios II/e).
2. For the cycles per instruction, refer to chapter 5, Nios II Core Implementation Details, in the Nios II Processor Reference Handbook
3. Also, refer An391 fro examples.

https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/an/an391.pdf

http://www.cs.columbia.edu/~sedwards/classes/2007/4840/n2cpu_nii5v1.pdf

Regards

Anand