mav f3e02a2349 Save one more register read per command by not reading rqstoutrp register
every time.  The purpose of that register is unlikely output queue overflow
detection, so read it only when its last known (and probably stale now)
value signals overflow.

This reduces CPU load and lock congestion and rises bottleneck in CTL
while doing target mode via two 8Gbps ports from 100K to 120K IOPS.
2013-11-10 13:37:44 +00:00
..
2013-11-08 16:56:13 +00:00
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