Processes and Threads
Resource Management[1]
In computing, a process is the instance of a computer program that is being executed by one or many threads. It contains the program code and its activity. Depending on the operating system (OS), a process may be made up of multiple threads of execution that execute instructions concurrently[2]
Video[edit]
Hands on tools[edit]
In general, we use the top command to view summary information about the running processes and threads (and much more). To see actual thread activity (blech) on an OS X system, type the sudo dtruss -ap pid (where PID is the process you want to investigate).
There are GUI tools where you can view this information, but you should use command line interface.