EOT calculation

Irrespective of P's simulation or execution status, is equal to .

The computation of is significantly more complex. An LP may send an acknowledgement in two cases:

1. By posting a message request on communicator C at the current simulation time and waiting on it. The request might get immediately matched with an already arrived message lying in the LP's message queue. The lower bound on the send timestamp of such an acknowledgement would be .
2. Upon getting a message, which gets matched with a request in its request list on communicator C. Let the timestamp of the earliest pending request on communicator C be . The lower bound on the send timestamp of such an acknowledgement would be . L is the minimum message latency of the target machine.