On 12/07/2011 03:30 PM, Rusty Russell wrote:
On Mon, 05 Dec 2011 16:58:37 +0800, Jason Wang<jasowang@xxxxxxxxxx> wrote:
multiple queue virtio-net: flow steering through host/guest cooperation
Hello all:
This is a rough series adds the guest/host cooperation of flow
steering support based on Krish Kumar's multiple queue virtio-net
driver patch 3/3 (http://lwn.net/Articles/467283/).
Is there a real (physical) device which does this kind of thing? How do
they do it? Can we copy them?
Cheers,
Rusty.
As far as I see, ixgbe and sfc have similar but much more sophisticated
mechanism.
The idea was originally suggested by Ben and it was just borrowed form
those real physical nic cards who can dispatch packets based on their
hash. All of theses cards can filter the flow based on the hash of
L2/L3/L4 header and the stack would tell the card which queue should
this flow goes.
So in host, a simple hash to queue table were introduced in tap/macvtap
and in guest, the guest driver would tell the desired queue of a flow
through changing this table.
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