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/). This idea is simple, the backend pass the rxhash to the guest and guest would tell the backend the hash to queue mapping when necessary then backend can choose the queue based on the hash value of the packet. The table is just a page shared bettwen userspace and the backend. Patch 1 enable the ability to pass the rxhash through vnet_hdr to guest. Patch 2,3 implement a very simple flow director for tap and mavtap. tap part is based on the multiqueue tap patches posted by me (http://lwn.net/Articles/459270/). Patch 4 implement a method for virtio device to find the irq of a specific virtqueue, in order to do device specific interrupt optimization Patch 5 is the part of the guest driver that using accelerate rfs to program the flow director and with some optimizations on irq affinity and tx queue selection. This is just a prototype that demonstrates the idea, there are still things need to be discussed: - An alternative idea instead of shared page is ctrl vq, the reason that a shared table is preferable is the delay of ctrl vq itself. - Optimization on irq affinity and tx queue selection Comments are welcomed, thanks! --- Jason Wang (5): virtio_net: passing rxhash through vnet_hdr tuntap: simple flow director support macvtap: flow director support virtio: introduce a method to get the irq of a specific virtqueue virtio-net: flow director support drivers/lguest/lguest_device.c | 8 ++ drivers/net/macvlan.c | 4 + drivers/net/macvtap.c | 42 ++++++++- drivers/net/tun.c | 105 ++++++++++++++++------ drivers/net/virtio_net.c | 189 +++++++++++++++++++++++++++++++++++++++- drivers/s390/kvm/kvm_virtio.c | 6 + drivers/vhost/net.c | 10 +- drivers/vhost/vhost.h | 5 + drivers/virtio/virtio_mmio.c | 8 ++ drivers/virtio/virtio_pci.c | 12 +++ include/linux/if_macvlan.h | 1 include/linux/if_tun.h | 11 ++ include/linux/virtio_config.h | 4 + include/linux/virtio_net.h | 16 +++ 14 files changed, 377 insertions(+), 44 deletions(-) -- Signature _______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/virtualization
