If you're expecting to always get the data in 5 cycles but you sporadically get in 250 cycles, you're no longer on a realtime system. The latency per se doesn't

If you're expecting to always get the data in 5 cycles but you sporadically get in 250 cycles, you're no longer on a realtime system. The latency per se doesn't matter, as long as it is what you expect it to be.