I see we are talking a lot about concurrency.

That's interesting to me, too.

I have some (simulated) highly concurrent numerical codes I am studying.

To see what is up, I need to make something like 'tallySends:', except 
it needs to
chase through the execution of all the processes forked from the initial 
block.

I tried the obvious, 'tallySends:' on a forked block, but it bumps into 
a simulation
error right away at the block fork.

Can anyone sketch out ways to run simulated across spawning processes and
keep on tallying?

    ...Tom M