c++ - Time Short Functions with cpu time using RTEMS operating system -

I'm looking for some code profiles in a real-time operating system, RTEMS mandatory form From, to read the time, there is a bunch of gems of work, in which the most useful is rtems_clock_get_ticks_since_boot .

The problem here is that for whatever reason the clock timer reported, our state machine loop rate is synchronized with 5kHz , while the processor is almost 200MHz Running on (embedded system). I know this because I recorded the time of the clock, waited for 1 second and only 5000 went off.

So the question is:

How do I get real CPU tunes from RTEMS?

PS clock () with GNU C (the same problem)

is a guide I see, but me < Code> impossible impedance in asm which indicates that I have to use some different codeer keywords. Maybe someone can tell me something like this?

---

Reference

I want to code some code, so essentially:

  start = cpu_clock_ticks ( ) // some code time = cpu_clock_ticks () - get started;  

The code runs in less than 0.125 ms, so the 8khz counter clock () and other functions get the function, do not cut it.