At 20x market data rate, mean latency was 1.4 microseconds, and jitter was 150 nanoseconds.
Audited STAC-N Benchmark of Supermicro overclocked servers using RHEL 6.3 HPN Add-On and Red Hat Developer Toolset with Mellanox ConnectX-3 adapters and RoCE.
Presentation by Ion Stoica, UC Berkeley, at the kickoff meeting of the STAC Big Data SIG, 7 March 2013. Covers Spark and Mesos, among other things.