Deal All,
I am executing a simple for() loop and like to calculate the time period
for this loop. I used rt_timer_read(). As per the document, it mentioned that
rt_timer_read() returns the current time expressed in clock ticks. I could not
able to get an clear idea about it. Suppose if i convert it by using
rt_timer_ticks2ns(), I am not getting the proper output. My code is,
RTIME start, end;
...
...
start=rt_timer_read();
for()
{}
end=rt_timer_read();
printf(TOTAL LOOP TIMING=%ld us\n", (long)((rt_timer_ticks2ns(end-start))/1000);
I would like to convert the ticks into nano seconds first and then into micro
seconds. The final result is irrelevant. I am not sure, where is the issue.
Help me to find the timings details properly.
In the example program trivial-periodic.c, they mentioned
"NOTE: printf may have unexpected impact on the timing of your program. It is
used here in the critical loop only for demonstration purposes."
Why?
-Prakash
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