Add RcuBenchmark as an (RcuTest, Perf) replacement
Add RcuBenchmark as an (RcuTest, Perf) replacement

Summary: Add RcuBenchmark as an (RcuTest, Perf) replacement

Reviewed By: djwatson

Differential Revision: D9443217

fbshipit-source-id: c751b98e0dd38128a157cfdfad6b21b87dbfb41c

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