Re: How does the Kernel decide which Umem frame to choose for the next packet?

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On Mon, May 18, 2020 at 10:39 AM Gaul, Maximilian
<maximilian.gaul@xxxxxx> wrote:
> Hello,
> I read through the paper "The Path to DPDK Speeds for AF XDP" but I couldn't find information about how the Kernel choses the Umem frame for the next packet? Or in case of zero-copy, how the driver decides which Umem frame to chose.
> But maybe I just overlooked it.
> So how does this work?

User-space decides this by what frames it enters into the fill ring.
Kernel-space uses the frames in order from that ring.


> Best regards
> Max

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