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TIBCO Rendezvous® 8.8.0

# Automatic Mode—Binary Search

In automatic mode, `rvperfm` uses a binary search algorithm to adjust its batch size and interval parameters between runs. These rules control `rvperfm` as it empirically determines the maximum throughput:

| • | For the first run, `rvperfm` determines the batch size and interval from command parameters or default values.

| • | If `rvperfm` loses data, it aborts the run immediately, and adjusts parameters to decrease the send rate for the next run.

| • | If even one of the `rvperfs` processes lost data during the run, then the send rate exceeds the maximum network throughput. In this case, `rvperfm` aborts the run, records the upper bound on maximum throughput, and adjusts the parameters to decrease the send rate for the next run.

| • | If all active `rvperfs` processes keep pace without lagging behind, and receive all the messages without losing data—then the send rate is lower than the maximum throughput. In this case, `rvperfm` records the lower bound on maximum throughput, and adjusts the parameters to increase the send rate for the next run.

| • | After a finite number of runs, the upper and lower bounds converge at the maximum throughput. When `rvperfm` exits, the report of the last run indicates the batch size and interval parameters that yield the maximum network throughput.

If no `rvperfs` processes are active, the parameters of the last run yield the maximum send rate for `rvperfm` on its host computer (with the prevailing network conditions).

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