Re: [virtio-dev] RE: [virtio-comment] Re: [PATCH v10] virtio-net: support inner header hash

[Heng Qi <hengqi@linux.alibaba.com>]

å 2023/3/17 äå3:55, Parav Pandit åé:
> > From: Heng Qi <hengqi@linux.alibaba.com>
> > Sent: Thursday, March 16, 2023 9:39 AM
> > A rough description of this scene is as follows:
> > Client1 sends packets to client2, and client2 sends packets to client1
> > respectively.
> > This is called two directions, and they are in the same flow.
> > The packets in the two directions may reach the processing host through
> > different tunnels. In this scenario, we need to hash these packets to the same
> > queue for the same cpu to process, so inner symmetric hashing is required.
> >
> >
> > client1                   client2
> >      |                         |
> >      |      __________         |
> >      +----->| tunnels |<-------+
> >             |---------|
> >                |  |
> >                |  |
> >                |  |
> >                v  v
> >          +-----------------+
> >          | processing host |
> >          +-----------------+
> I understood now. The key piece is the processing host is different from clients 1 and 2, I was missing that.
> The key is there are two tunnels and processing data on the inner header for the different tunnels is your primary requirement.
> Hence inner hashing helps to serialize them.

Yes, you are right.