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sephe
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V 27
2017-04-27T01:58:20.204425Z
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V 492
MFC 317353

    hyperv/hn: Use channel0, i.e. TX ring0, for TCP SYN/SYN|ACK.

    Hyper-V hot channel effect:
    Operation latency on hot channel is only _half_ of the operation
    latency on cold channels.

    This commit takes the advantage of the above Hyper-V host channel
    effect, and can reduce more than 75% latency and more than 50%
    latency stdev, i.e. lower and more stable/predictable latency,
    for various types of web server workloads.

    Sponsored by:   Microsoft

END