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You can find more details about this option here:  http://www.intel.com/content/dam/www/public/us/en/documents/white-papers/open-source-kernel-enhancements-paper.pdf Intel Whitepaper - Open Source Kernel Enhancements for Low-Latency Sockets using Busy Poll

Linux kernel support:

Kernel should be built with CONFIG_NET_RX_BUSY_POLL compilation option which is enabled by default in RHEL 7.x, no changes are needed for this OS.

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