By the way, if you have multiple cores you may need to use mpstat to see it, and you may not see it at all with mpstat if the scheduler shifts the main loop iterations to different cores (but the busy iterations will still be happening).
Chris
By the way, if you have multiple cores you may need to use mpstat to see it, and you may not see it at all with mpstat if the scheduler shifts the main loop iterations to different cores (but the busy iterations will still be happening).
Chris