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Before performance fix (1) (shown by old-unreliable+infud) latency for small
messages was worse than TCP through the Linux kernel. After fixes, however,
unreliable+infud is slightly faster for small messages than Infiniband's native
reliable transport (infrc) which is implemented in hardware. Because fast+infud
is so close to infrc in performance and is bounded by unreliable+infud, we believe
we may actually be able to beat the hardware-based transport protocol in software.
This means we'll continue on plan with our efforts to optimize the code for
small messages with focus focused optimizations using our metrics system.
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