In The Grinder, the script context includes a thread number, a process number, and a run number. I believe the thread number identifies a thread within a group of threads spawned by a worker process. The process number identifies a worker processes created by an agent. What is the run number? To put it another way, what actions result in a new run number?
to be more precise, this is the number of times that call method has been called by grinder agent.
For example, line 16: