Why Does Flow Director Cause Packet Reordering?

Details Why Does Flow Director Cause Packet Reordering? Why Does Flow Director Cause Packet Reordering?

2011-06-02

arxiv.org/abs/1106.0443v1

IEEE Commun.Lett.15:253-255,2011

Computer Science

Networking and Internet Architecture

Scientific paper

10.1109/LCOMM.2011.122010.102022

Intel Ethernet Flow Director is an advanced network interface card (NIC) technology. It provides the benefits of parallel receive processing in multiprocessing environments and can automatically steer incoming network data to the same core on which its application process resides. However, our analysis and experiments show that Flow Director cannot guarantee in-order packet delivery in multiprocessing environments. Packet reordering causes various negative impacts. E.g., TCP performs poorly with severe packet reordering. In this paper, we use a simplified model to analyze why Flow Director can cause packet reordering. Our experiments verify our analysis.

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