16-bit CmdRN too small?

[Costa Sapuntzakis <csapuntz@cisco.com>]

Is 16-bit CmdRN too small?

A 16-bit CmdRN with a sliding window gives you the ability to issue
max 32768 commands simulatenously.

If each of these is an 8K write:

32768 * 8K = 256MB

Which, on a 10GE connection, is about 200ms. If the round-trip time
is greater than 200ms, then the initiator can't fill the pipe.

-Costa