RHEL7: tuned low latency setting affects iperf3 performance

Solution In Progress - Updated -

Issue

  • Even after upgrading to a kernel with these fixes: https://access.redhat.com/solutions/2918251 performance is very inconsistent and throughput degraded.
  • Specifically throughput is degraded when more than one TCP stream is operational.

Environment

  • Red Hat Enterprise 7
  • Ixgbe (other NICs may also be affected)

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