After the sum is computed and printed the master task informs the PVM
daemon that it is withdrawing from the virtual machine.
This is done by calling the routine
As for the worker program, after enrolling in the virtual machine the
worker tasks wait to receive their portion of the array to be summed.
Using the `-1' values in the
pvmfrecv() call indicates that the
task does not care what task the message was sent from nor what label was
Since the size of the array being sent may not be known ahead of time,
the receiving array is declared with enough space to hold any
reasonable number of items.
Once unpacked, the array fragment is summed up and the total is sent
back to the parent.
The task id of the task that spawned the current task is returned by the
call pvmfparent(tid)Note that since the master program is expecting a
msgtagof `7' from the worker tasks, this value must be used in the
Helpful Hint: If the set of tasks spawned will need to communicate
amongst themselves, the spawning task
needs to send the task array
tids that is generated in the
pvmfspawn() routine to each.