"clebert.suconic(a)jboss.com" wrote : The minimal resolution I have found on Rhel is 1 millisecond. No matter what you do. (No wonder Java has decided to not implement System.sleep for micro and nanosleep yet). That's a mess when you consider multiple platform even among different kernel versions. Clebert, this does not make sense. Earlier in this thread you posted results that showed 1000000 nanosleeps taking in total 17, 3856 milliseconds, which is way less than 1 ms, so your statement is completely contradictory to your results. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4235570#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...