How to measure system jitter
I have to measure system jitter under heady load conditions.
Can somebody tell me any open source available for the same.
If I wish to make my own program then How should I take the time stamps so that I get the most accurate reading.
gettimeofday I guess will not give the correct jitter value because it will have its own jitter introduced.
What I mean is the following code will not give the correct jitter value.
usleep(10000) // 10 ms
(end... - start....) will have gettimeofday delay as well
The correct value of jitter has to be something like this:
<timestamp X: When process went to sleep for 10 ms>
<timestamp Y: When process rescheduled after (10+t) ms where t is jitter>
Can some body tell me how to make a program which can take these timestamps.
If someone can provide me some open source for the same then it would be even better.
Thanks in Advance
Last edited by nitinarora; 05-26-2009 at 01:02 AM.