I want to evaluate time of function execution in simulator. This function (void abc() for example) is called from external interrupt routine. I have done some tests and got different results: 1 test: On chip. After interrupt occurs, I write 1 to pin, then abc(), and write 0 to pin. So, I can use oscillograph to see real execution time of abc() between pin statement changing. It is about 400mks. 2 test: In Simulator. I wrote endless loop (while(1)) with abc() routine and made measurement with Perfomance Analyzer. It is 470 mks. 3 test: In Simulator. It repeats first test, but i look for time in Register window(Sec) between two breakpoints (before and after abc()). It is about 100 mks. Processor XC167CI with 32 MHz clock. Why so different results in measuring?
The simulator is not cycle accurate and does not account for memory/peripheral accesses, pipeline stalls, etc. My recommendation is to use the simulator/profiler to find relative performance issues. If you are looking to measure cycle accurate timing then you should use an emulator (Lauterbach or Hitex) as this will give all of the cycles. I am not familiar with the time unit (mks), should I assume this is microseconds (0.000001 "millionth of a second")?
U r right, i mean microseconds
U r right, i mean microseconds Now that is cleared up, what is uppercase U an abbreviation for, micro is lower case. I guess the 'r' is for resistor or resistance Erik
Well, if 'u' is "micro", then 'U' must stand for "macro". Macro resistance to the right -- but he says nothing about resistance to the left, so I suppose there is none. Must be talking about a diode on the board. I'm puzzled as to what happens when you turn the board over, though, swapping left for right. I'm not familiar with any diodes that can maintain an absolute spatial orientation. Could be handy for building products that only work during the day or during the night, though.
Exuse me, this topic is about time measuring! I correct "mks" for microseconds.
how then about correcting the Stupid Monkey S*** which makes us discuss micro, macro and resistance. repost in ENGLISH Erik
Note This message was edited because of rude or abusive language.
Think different! It's not a literature forum. Sorry for abridgements.
Think different! It's not a literature forum. EXACTLY and thus there should be no need for a major in litt to understand the posts. Sorry for abridgements accepted, now repost in English, and I'll try to help Erik
"'mks' for microseconds." What's wrong with "us"? Surely "mks" would be the metre-kilogramme-second system of units?