In Linux, I can confirm the CPU rate of use of the thread level by a top -H -b command, but do not seem to support a -H -b option by the top command of Mac OSX.
How to examine the ID of a thread using a lot of CPU's for Mac OSX?
ps -aux at the command line will quickly get you the resource information fro all threads running. you could pipe it into a grep command for specifics.
ps -aux |grep myPID