Frequency of StratixIV

I make as you said. But always i find the same time.

I explain to you what i do exactly. I have the SOPC given by the stratix IV GX. It work with simple program hello_world, i try to change the software, in the end i puts the execution time of my program. When i make a debug as NIOS II, i obtained 300ms.

Every time i change the frequency, i notes that the time always 300ms.

I change first the frequency under SOPC (input of PLL is 50 MHZ, pll.co=150Mhz, ppl.c1=150 MHZ) and i finished by generate. As you said,i uncomment derive_pll_clocks -create_base_clocks and add the three file "CPU.sdc, pll.sdc, and tse_mac_constraints.sdc" to timing analyser, Finally i compile my project. when i debug my program after building i obtained also 300 ms.