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Implemented zero copy between vale ports#577

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suja-sasikumar wants to merge 1 commit intoluigirizzo:masterfrom
suja-sasikumar:vale-zero-copy
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Implemented zero copy between vale ports#577
suja-sasikumar wants to merge 1 commit intoluigirizzo:masterfrom
suja-sasikumar:vale-zero-copy

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Implemented zero copy between vale ports for better performance. Zero copy of packet will be done as long as :

  • it is not to a broadcast packet, and
  • the source and dest ports are in the same memory region.

Also, provided a compile time option to turn zero copy mode ON/OFF.

time option to turn zero copy mode ON/OFF.
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